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Cisco Systems 3750E manual Configuration Guidelines, Default Configuration, 21-5

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Chapter 21 Configuring Flex Links and the MAC Address-Table Move Update Feature

Configuring Flex Links and MAC Address-Table Move Update

These sections contain this information:

•Configuration Guidelines, page 21-5

•Default Configuration, page 21-5

Configuration Guidelines

Follow these guidelines to configure Flex Links:

•You can configure only one Flex Link backup link for any active link, and it must be a different interface from the active interface.

•An interface can belong to only one Flex Link pair. An interface can be a backup link for only one active link. An active link cannot belong to another Flex Link pair.

•Neither of the links can be a port that belongs to an EtherChannel. However, you can configure two port channels (EtherChannel logical interfaces) as Flex Links, and you can configure a port channel and a physical interface as Flex Links, with either the port channel or the physical interface as the active link.

•A backup link does not have to be the same type (Gigabit Ethernet or port channel) as the active link. However, you should configure both Flex Links with similar characteristics so that there are no loops or changes in behavior if the standby link begins to forward traffic.

•STP is disabled on Flex Link ports. A Flex Link port does not participate in STP, even if the VLANs present on the port are configured for STP. When STP is not enabled, be sure that there are no loops in the configured topology.

Follow this guideline to configure VLAN load balancing on the Flex Links feature:

For Flex Link VLAN load balancing, you must choose the preferred VLANs on the backup interface.

Follow these guidelines to configure MAC address-table move update feature:

•You can enable and configure this feature on the access switch to send the MAC address-table move updates.

•You can enable and configure this feature on the uplink switches to get the MAC address-table move updates.

Default Configuration

The Flex Links are not configured, and there are no backup interfaces defined.

The preemption mode is off.

The preemption delay is 35 seconds.

The MAC address-table move update feature is not configured on the switch.

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

	OL-9775-02	21-5

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Cisco Systems 3750E manual Configuration Guidelines, Default Configuration, 21-5

Contents

Text Part Number OL-9775-02 Americas HeadquartersPage Iii N T E N T SAssigning the Switch IP Address and Default Gateway Understanding Cisco Configuration Engine Software Clustering Switches Vii Catalyst 1900 and Catalyst 2820 CLI ConsiderationsViii Creating a BannerChanging the Default Privilege Level for Lines Device Roles Bypass Xii Routed PortsXiii Monitoring and Maintaining the InterfacesXiv Encapsulation TypesDomain Names Xvi Private-VLAN Configuration GuidelinesXvii Disabled StateXviii Boundary Ports19-25 XixDhcp Server Xxi Configuring Dynamic ARP InspectionXxii Configuring MVRXxiii Understanding Storm ControlXxiv Understanding Udld Modes of OperationXxv Creating an Rspan Source SessionXxvi Snmp Agent FunctionsXxvii Creating a Numbered Extended ACLXxviii Interaction with Other Features and SwitchesXxix Xxx Port-Channel InterfacesXxxi Configuring IP AddressingXxxii Nonstop Forwarding AwarenessXxxiii IPv6 AddressesXxxiv Configuring Hsrp PriorityXxxv Configuring IP Multicast RoutingXxxvi Configuring Basic Dvmrp Interoperability FeaturesXxxvii Using a Filter45-14 XxxviiiXxxix Configuring Online DiagnosticsUnsupported Route-Map Configuration Commands C-1 Xli HsrpXlii VTPConventions PrefaceAudience PurposeXliv Related PublicationsXlv Xlvi Overview FeaturesAvailability and Redundancy Features, Vlan Features, Deployment FeaturesOverview Features Performance Features Management Options Manageability Features Availability and Redundancy Features Security Features Vlan FeaturesOverview Features QoS and CoS Features Layer 3 Features Power over Ethernet Features Monitoring Features Default Settings After Initial Switch ConfigurationVlan Overview Default Settings After Initial Switch Configuration Overview Default Settings After Initial Switch Configuration Design Concepts for Using the Switch Network Configuration ExamplesNetwork Demands Suggested Design Methods Cost-Effective Wiring Closet High-Performance Wiring Closet High-Performance Workgroup Gigabit-to-the-Desktop Redundant Gigabit Backbone Server Aggregation Linux Server Cluster Cisco SoftPhone Software Gigabit servers Internet Cisco 2600 or 3700 routers Catalyst 3560-E switches Large Network Using Catalyst 3750-E and 3560-E Switches Cisco 7x00 routers Catalyst Catalyst 3560-E Multidwelling Network Using Catalyst 3750-E Switches 11 Catalyst 3750-E Switches in a MAN Configuration Long-Distance, High-Bandwidth Transport ConfigurationAccess layer Aggregation layer Where to Go NextOL-9775-02 Understanding Command Modes Using the Command-Line InterfaceCtrl-Z Mode Access Method Prompt Exit Method About This ModeConfigure QuitLine vty or line Console commandCommand Purpose Understanding the Help SystemCommand keyword ? Understanding Abbreviated CommandsUnderstanding no and default Forms of Commands Command ?Using Configuration Logging Understanding CLI Error MessagesError Message Meaning How to Get Help Action1 Result Using Command HistoryChanging the Command History Buffer Size Recalling CommandsSwitch# terminal editing Using Editing FeaturesDisabling the Command History Feature Enabling and Disabling Editing FeaturesCapability Keystroke1 Purpose Editing Commands through KeystrokesReturn and Space bar Editing Command Lines that WrapPress Ctrl-L or Ctrl-R Command begin include exclude regular-expression Accessing the CLISwitch# show interfaces include protocol Using the Command-Line Interface Accessing the CLI OL-9775-02 Understanding the Boot Process Assigning the Switch IP Address and Default GatewayAssigning Switch Information Understanding DHCP-Based Autoconfiguration Default Switch InformationFeature Default Setting Dhcp Client and Server Message Exchange Dhcp Client Request ProcessDhcp Server Configuration Guidelines Configuring DHCP-Based AutoconfigurationConfiguring the DNS Configuring the Tftp ServerObtaining Configuration Files Configuring the Relay DeviceRouterconfig-if#ip helper-address Tftpserver Example ConfigurationDhcp Client Configuration Switch a Switch B Switch C Switch DDNS Server Configuration Tftp Server Configuration on UnixManually Assigning IP Information Switch# show running-config Checking and Saving the Running ConfigurationSwitch# copy running-config startup-config Default Boot Configuration Modifying the Startup ConfigurationAutomatically Downloading a Configuration File Configure terminal Enter global configuration mode Booting ManuallyBoot config-file flash/ file-url Show bootBoot system filesystem /file-url Booting a Specific Software ImageControlling Environment Variables Boot system switch number allSet Switchpriority Set Manualboot yes Boot manualSet Switchnumber Switch current-stack-member-number renumberReload in hhmm text Configuring a Scheduled ReloadScheduling a Reload of the Software Image Variable DescriptionSwitch# reload at 0200 jun Switch# reload atDisplaying Scheduled Reload Information Understanding Cisco Configuration Engine Software Configuring Cisco IOS CNS AgentsConfiguration Engine Architectural Overview Configuration ServiceNameSpace Mapper Event ServiceConfigID What You Should Know About the CNS IDs and Device HostnamesDeviceID Using Hostname, DeviceID, and ConfigIDHostname and DeviceID Understanding Cisco IOS Agents Initial ConfigurationEnabling Automated CNS Configuration Configuring Cisco IOS AgentsIncremental Partial Configuration Synchronized ConfigurationDevice Required Configuration Show cns event connections Backup init-retry retry-count keepalive secondsShow running-config Enabling the CNS Event AgentEnabling the Cisco IOS CNS Agent Enabling an Initial ConfigurationCns id hardware-serial hostname string string Cns config initial ip-address hostnameCns id interface num dns-reverse ipaddress Mac-address eventShow cns config stats Enabling a Partial ConfigurationShow running-config Verify your entries Cns config partial ip-address hostnameShow cns event subject Displaying CNS ConfigurationShow cns config connections Show cns event statsUnderstanding Switch Stacks Managing Switch StacksManaging Switch Stacks Understanding Switch Stacks Switch Stack Membership Creating a Switch Stack from Two Standalone Switches Stack Master Election and Re-Election Adding a Standalone Switch to a Switch StackStack Member Numbers Switch Stack Bridge ID and Router MAC AddressStack Member Priority Values Effects of Adding a Provisioned Switch to a Switch Stack Switch Stack Offline ConfigurationScenario Result Scenario Result Effects of Replacing a Provisioned Switch in a Switch Stack Switch Stack Software Compatibility RecommendationsMinor Version Number Incompatibility Among Switches Major Version Number Incompatibility Among SwitchesStack Protocol Version Compatibility Understanding Auto-Upgrade and Auto-Advise Switch Auto-Upgrade and Auto-Advise Example MessagesDirectory Mar 1 000422.537%IMAGEMGR-6-AUTOADVISESW Switch Stack Configuration Files Incompatible Software and Stack Member Image UpgradesSwitch Stack Management Connectivity Connectivity to the Switch Stack Through an SSH Session Connectivity to the Switch Stack Through an IP AddressConnectivity to Specific Stack Members Use the switch stack-member-number Switch Stack Configuration ScenariosPriority new-priority-number global Current-stack-member-number Renumber new-stack-member-number Default Switch Stack Configuration Configuring the Switch StackEnabling Persistent MAC Address Time-value Stack-mac persistent timerShow switch Switchconfig# stack-mac persistent timerAssigning Stack Member Information Setting the Stack Member Priority ValueAssigning a Stack Member Number Provisioning a New Member for a Switch Stack Show switch stack-member-number Accessing the CLI of a Specific Stack MemberDisplaying Switch Stack Information Command DescriptionShow switch stack-ring activity Show switch stack-portsDetail OL-9775-02 Understanding Switch Clusters Clustering SwitchesSwitch Cisco IOS Release Cluster Capability Standby Cluster Command Switch Characteristics Cluster Command Switch CharacteristicsCandidate Switch and Cluster Member Switch Characteristics Planning a Switch ClusterDiscovery Through CDP Hops Automatic Discovery of Cluster Candidates and MembersDiscovery Through CDP Hops Discovery Through Different VLANs Discovery Through Different VLANs Discovery Through Different Management VLANsDiscovery Through Routed Ports New out-of-box Discovery of Newly Installed SwitchesHsrp and Standby Cluster Command Switches Other Considerations for Cluster Standby Groups Virtual IP AddressesAutomatic Recovery of Cluster Configuration Hostnames IP AddressesSnmp Community Strings PasswordsSwitch Stack Switch Cluster Switch Clusters and Switch StacksMembers Other cluster member switches LRE Profiles TACACS+ and RadiusSwitch# rcommand Using the CLI to Manage Switch ClustersCatalyst 1900 and Catalyst 2820 CLI Considerations Snmp Management for a Cluster Using Snmp to Manage Switch ClustersOL-9775-02 Managing the System Time and Date Administering the SwitchUnderstanding the System Clock NTP Understanding Network Time ProtocolTypical NTP Network Configuration Configuring NTPConfiguring NTP Authentication Default NTP ConfigurationNtp authenticate Configuring NTP Associations Key keyid source interface prefer Configuring NTP Broadcast ServiceSwitchconfig# ntp server 172.16.22.44 version Ntp peer ip-address version numberNtp broadcast client Interface interface-idNtp broadcast version number key keyid Destination-addressServe-onl y serve peer Configuring NTP Access RestrictionsNtp broadcastdelay microseconds Ntp access-group query-onlyCommand Purpose Interface interface-id Configuring the Source IP Address for NTP PacketsFundamentals Command Reference, Release Configuring Time and Date ManuallyDisplaying the NTP Configuration Setting the System ClockMinutes-offset Displaying the Time and Date ConfigurationConfiguring the Time Zone Clock timezone zone hours-offsetHh mm offset Configuring Summer Time Daylight Saving TimeClock summer-time zone recurring Week day month hh mm week day monthClock summer-time zone date month Configuring a System Name and PromptClock summer-time zone date date Understanding DNS Default System Name and Prompt ConfigurationConfiguring a System Name Copy running-config startup-confi gIp name-server server-address1 Default DNS ConfigurationSetting Up DNS Ip domain-name nameDisplaying the DNS Configuration Default Banner ConfigurationCreating a Banner Banner motd c message c Configuring a Message-of-the-Day Login BannerUnix telnet Banner login c message c Configuring a Login BannerManaging the MAC Address Table MAC Addresses and VLANs Building the Address TableDefault MAC Address Table Configuration MAC Addresses and Switch StacksChanging the Address Aging Time Show mac address-table aging-time Configuring MAC Address Notification TrapsRemoving Dynamic Address Entries Mac address-table aging-timeMac address-table notification String by using the snmp-server communitySnmp-server enable traps mac-notification Snmp-server host host-addr traps informs versionAdding and Removing Static Address Entries Show mac address-table static Configuring Unicast MAC Address FilteringMac address-table static mac-addr Vlan vlan-id interface interface-idVlan vlan-id drop Displaying Address Table Entries Managing the ARP TableOL-9775-02 Understanding the SDM Templates Configuring SDM TemplatesDual IPv4 and IPv6 SDM Templates Resource Access Default RoutingIPv4-and-IPv6 Resource Default Routing SDM Templates and Switch StacksDefault SDM Template Configuring the Switch SDM TemplateSDM Template Configuration Guidelines Vlan routing vlan Setting the SDM TemplateSdm prefer access default Dual-ipv4-and-ipv6 default routingSwitchconfig# sdm prefer dual-ipv4-and-ipv6 default Switchconfig# sdm prefer routingDisplaying the SDM Templates Policy based routing aces 25K OL-9775-02 Preventing Unauthorized Access to Your Switch Configuring Switch-Based AuthenticationDefault Password and Privilege Level Configuration Protecting Access to Privileged Exec CommandsEnable password password Setting or Changing a Static Enable PasswordSwitchconfig# enable password l1u2c3k4y5 Service password-encryption Enable password level level passwordEncryption-type encrypted-password Enable secret level level passwordNo service password-recovery Disabling Password RecoveryShow version Switchconfig-line#password let45me67in89 Setting a Telnet Password for a Terminal LineConfiguring Username and Password Pairs Password passwordUsername name privilege level Configuring Multiple Privilege LevelsUsername command Login localPrivilege mode level level command Setting the Privilege Level for a CommandShow privilege Command Changing the Default Privilege Level for LinesLogging into and Exiting a Privilege Level Understanding TACACS+ Controlling Switch Access with TACACS+Typical TACACS+ Network Configuration TACACS+ Operation Configuring TACACS+Aaa group server tacacs+ group-name Default TACACS+ ConfigurationTacacs-server host hostname port Aaa new-modelAaa new-model Enable AAA Configuring TACACS+ Login AuthenticationShow tacacs Verify your entries Line console tty vty line-number Aaa authentication login defaultLogin authentication default Authentication login commandShow running-config Verify your entries Displaying the TACACS+ Configuration Controlling Switch Access with RadiusStarting TACACS+ Accounting Understanding Radius Radius Operation Transitioning from Radius to TACACS+ ServicesDefault Radius Configuration Configuring RadiusIdentifying the Radius Server Host Page Seconds retransmit retries key Acct-port port-number timeoutRadius-server host hostname Ip-address auth-port port-numberSwitchconfig# radius-server host host1 Configuring Radius Login AuthenticationServer Host section on Defining AAA Server Groups Aaa group server radius group-name Radius Aaa authorization network radiusStarting Radius Accounting Radius-server retransmit retries Configuring Settings for All Radius ServersRadius-server timeout seconds Radius-server key stringCisco-avpair=ipoutacl#2=deny ip 10.10.10.10 0.0.255.255 any AuthenticationRadius-server vsa send accounting Cisco-avpair=shellpriv-lvl=15Displaying the Radius Configuration Controlling Switch Access with KerberosRadius-server host hostname ip-address non-standard Understanding Kerberos KDC Term DefinitionSrvtab Authenticating to a Boundary SwitchKerberos Operation KeytabAuthenticating to Network Services Configuring KerberosObtaining a TGT from a KDC Aaa authorization exec local Aaa authentication login default localAaa authorization network local Username command Configuring the Switch for Secure ShellUsername name privilege level SSH Servers, Integrated Clients, and Supported Versions Understanding SSHConfiguration Guidelines Configuring SSHLimitations Setting Up the Switch to Run SSH Authentication-retries number Displaying the SSH Configuration and StatusConfiguring the SSH Server Ip ssh timeout secondsUnderstanding Secure Http Servers and Clients Configuring the Switch for Secure Socket Layer HttpCertificate Authority Trustpoints Rsakeypair TP-self-signed-3080755072 Default SSL Configuration Configuring Secure Http Servers and ClientsCipherSuites Configuring a CA Trustpoint SSL Configuration GuidelinesConfiguring the Secure Http Server Ip http client secure-trustpoint name Configuring the Secure Http ClientIp http timeout-policy idle seconds life Show ip http server secure statusShow ip http client secure status Configuring the Switch for Secure Copy ProtocolDisplaying Secure Http Server and Client Status Ip http client secure-ciphersuiteHtml Information About Secure CopyOL-9775-02 Understanding Ieee 802.1x Port-Based Authentication Configuring Ieee 802.1x Port-Based Authentication10-1 10-2 Device Roles10-3 Authentication Process10-4 Authentication Flowchart10-5 Authentication Initiation and Message ExchangeEAPOL-Start 10-6Ports in Authorized and Unauthorized States Ieee 802.1x Authentication and Switch Stacks10-7 10-8 Ieee 802.1x Host Mode10-9 Ieee 802.1x AccountingIeee 802.1x Accounting Attribute-Value Pairs Attribute Number AV Pair Name10-10 Using Ieee 802.1x Authentication with Vlan Assignment10-11 Using Ieee 802.1x Authentication with Per-User ACLs10-12 Using Ieee 802.1x Authentication with Guest Vlan10-13 Using Ieee 802.1x Authentication with Restricted Vlan10-14 10-15 Using Ieee 802.1x Authentication with Voice Vlan Ports10-16 Using Ieee 802.1x Authentication with Port Security10-17 Using Ieee 802.1x Authentication with Wake-on-LAN10-18 Network Admission Control Layer 2 Ieee 802.1x Validation Using Multidomain Authentication10-19 For example Using Web Authentication10-20 10-21 Configuring Ieee 802.1x AuthenticationAAA Default Ieee 802.1x Authentication Configuration10-22 Ieee 802.1x Authentication Ieee 802.1x Authentication Configuration Guidelines10-23 10-24 MAC Authentication Bypass Configuring Ieee 802.1x Authentication10-25 10-26 Configuring the Switch-to-RADIUS-Server Communication10-27 Ip-address auth-port port-number keyShow dot1x interface interface-id Configuring the Host ModeDot1x host-mode multi-host Multi-domainManually Re-Authenticating a Client Connected to a Port Configuring Periodic Re-Authentication10-29 Show dot1x interface interface-id Verify your entries Changing the Switch-to-Client Retransmission TimeDot1x timeout tx-period seconds Changing the Quiet PeriodDot1x max-reauth-req count Setting the Switch-to-Client Frame-Retransmission NumberSwitchconfig-if#dot1x timeout tx-period Show dot1xinterface interface-id Verify your entries10-32 Setting the Re-Authentication NumberConfiguring Ieee 802.1x Accounting Switchconfig-if#dot1x max-reauth-req10-33 Configuring a Guest VlanDot1x guest-vlan vlan-id Configuring a Restricted VlanSwitchport mode private-vlan host Switchconfig# interface gigabitethernet2/0/210-35 Dot1x auth-fail vlan vlan-idDot1x auth-fail max-attempts max AttemptsTries tries Configuring the Inaccessible Authentication Bypass FeatureSwitchconfig-if#dot1x auth-fail max-attempts Radius-server dead-criteria time time10-37 Show dot1x interface interface-id Configuring Ieee 802.1x Authentication with WoLDot1x critical recovery action Reinitialize vlan vlan-idDot1x control-direction both Configuring MAC Authentication BypassSwitchconfig-if#dot1x control-direction both Switchconfig-if#dot1x mac-auth-bypass10-40 Configuring NAC Layer 2 Ieee 802.1x Validation10-41 Configuring Web Authentication10-42 10-43 Disabling Ieee 802.1x Authentication on the PortNo dot1x pae Disable Ieee 802.1x authentication on the port Dot1x fallback fallback-profile10-44 Displaying Ieee 802.1x Statistics and StatusUnderstanding Interface Types Configuring Interface Characteristics11-1 Port-Based VLANs Switch Ports11-2 Trunk Ports Access Ports11-3 Tunnel Ports Routed Ports11-4 EtherChannel Port Groups Switch Virtual Interfaces11-5 11-6 Power over Ethernet PortsGigabit Ethernet Interfaces Supported Protocols and StandardsClass Powered-Device Detection and Initial Power Allocation11-7 11-8 Power Management Modes11-9 Power Monitoring and Power Policing11-10 Maximum Power Allocation Cutoff Power on a PoE Port11-11 Connecting Interfaces11-12 Ethernet Management Port11-13 Connecting a Switch Stack to a PC11-14 TftpMgmtclr Using Interface Configuration ModeMgmtinit Mgmtshow11-16 Procedures for Configuring InterfacesShow interfaces interface-id Configuring a Range of InterfacesInterface range port-range macro Macroname11-18 Interface range macro macroname Configuring and Using Interface Range MacrosShow running-config include define Define interface-range macroname11-20 Configuring Ethernet InterfacesSwitch# show running-config include define Switch# show run include define11-21 Default Ethernet Interface ConfigurationSpeed and Duplex Configuration Guidelines Configuring Interface Speed and Duplex Mode11-22 Duplex auto full half Setting the Interface Speed and Duplex ParametersSpeed 10 100 1000 auto 10 NonegotiateFlowcontrol receive on off desired Configuring Ieee 802.3x Flow Control11-24 11-25 Configuring Auto-MDIX on an InterfaceLocal Side Auto-MDIX With Correct CablingInterface-id phy Configuring a Power Management Mode on a PoE Port11-26 Neve r static max max-wattage Budgeting Power for Devices Connected to a PoE PortPower inline auto max max-wattage Show power inline i nterface-id11-28 Wattage11-29 Configuring Power Policing11-30 Adding a Description for an Interface11-31 Configuring Layer 3 InterfacesConfiguring Ethernet Management Ports Switch# show interfaces gigabitethernet1/0/2 description11-32 No switchportInterface gigabitethernet interface-id vlan vlan-id No shutdown11-33 Configuring the System MTU11-34 Use the system mtu jumbo Use the system mtu routingSystem mtu jumbo bytes System mtu routing bytesShow system mtu Configuring the Cisco Redundant Power SystemSystem mtu bytes Reload11-36 Power rps switch-number name string serialnumberPower rps switch-number port rps-port-id mode active StandbyShow env rps Configuring the Power SuppliesPower supply switch-numberoff on Show env powerMonitoring Interface Status Monitoring and Maintaining the Interfaces11-38 11-39 Clearing and Resetting Interfaces and Counters11-40 Shutting Down and Restarting the InterfaceInterface vlan vlan-id gigabitethernet interface-id ShutdownUnderstanding Smartports Macros Configuring Smartports Macros12-1 12-2 Configuring Smartports MacrosDefault Smartports Macro Configuration Macro Name Description12-3 Smartports Macro Configuration GuidelinesShow parser macro name macro-name Creating Smartports MacrosMacro name macro-name Name Sample-Macro and macro name sample-macro will result12-5 Applying Smartports Macros12-6 Applying Cisco-Default Smartports MacrosShow parser macro Show parser macro macro-nameSwitchconfig-if#macro apply cisco-desktop $AVID Switch# show parser macro cisco-desktop12-7 12-8 Displaying Smartports MacrosShow parser macro brief Show parser macro description interfaceUnderstanding VLANs Configuring VLANs13-1 13-2 Vlan Port Membership Modes Supported VLANs13-3 13-4 Configuring Normal-Range VLANs13-5 Vlan IDToken Ring VLANs Normal-Range Vlan Configuration Guidelines13-6 Vlan Configuration in Vlan Database Configuration Mode Vlan Configuration Mode OptionsSaving Vlan Configuration Vlan Configuration in config-vlan Mode13-8 Default Ethernet Vlan ConfigurationParameter Default Range VLANxxxx, where13-9 Copy running-config startup configCreating or Modifying an Ethernet Vlan Remote-spanVlan database Deleting a Vlan13-10 Show vlan brief Assigning Static-Access Ports to a VlanSwitchport access vlan vlan-id No vlan vlan-idVlan fields of the display Configuring Extended-Range VLANsDefault Vlan Configuration Show interfaces interface-id switchport13-13 Extended-Range Vlan Configuration Guidelines13-14 Vtp mode transparentCreating an Extended-Range Vlan Show vlan id vlan-idShow vlan internal usage Switchconfig# vtp mode transparentSwitch# copy running-config startup config Creating an Extended-Range Vlan with an Internal Vlan IDTrunking Overview Configuring Vlan TrunksCommand Command Mode Purpose Displaying VLANs13-17 Switches in an ISL Trunking Environment13-18 Mode FunctionEncapsulation Types Encapsulation Function13-19 Default Layer 2 Ethernet Interface Vlan ConfigurationConfiguring an Ethernet Interface as a Trunk Port Ieee 802.1Q Configuration Considerations13-20 Interaction with Other FeaturesConfiguring a Trunk Port Dot1q negotiate13-21 Defining the Allowed VLANs on a Trunk13-22 Switchport trunk allowed vlan addChanging the Pruning-Eligible List All except remove vlan-listVlan ,vlan Configuring the Native Vlan for Untagged TrafficSwitchport trunk pruning vlan add Except none remove vlan-list13-24 Configuring Trunk Ports for Load SharingLoad Sharing Using STP Port Priorities Switchport trunk native vlan vlan-id13-25 Exit Return to global configuration mode Load Sharing Using STP Path CostOr switch stack Connect to the trunk ports configured on Switch aSpanning-tree vlan 2-4 cost Switchport trunk encapsulationInterface gigabitethernet1/0/1 Isl dot1q negotiateUnderstanding Vmps Configuring Vmps13-28 13-29 Default Vmps Client ConfigurationVmps Configuration Guidelines Dynamic-Access Port Vlan MembershipEntering the IP Address of the Vmps Configuring the Vmps Client13-30 Vmps reconfirm Configuring Dynamic-Access Ports on Vmps ClientsSwitchport access vlan dynamic Reconfirming Vlan Memberships13-32 Changing the Reconfirmation IntervalChanging the Retry Count Vmps reconfirm minutesMonitoring the Vmps Troubleshooting Dynamic-Access Port Vlan MembershipVmps Configuration Example Switch# show vmps13-34 Dynamic Port Vlan Membership ConfigurationUnderstanding VTP Configuring VTP14-1 14-2 VTP Domain14-3 VTP Mode DescriptionVTP Modes VTP AdvertisementsVTP Pruning VTP Version14-4 Vlan 14-5VTP and Switch Stacks Configuring VTP14-6 14-7 Default VTP ConfigurationVTP Configuration Options VTP Configuration in Global Configuration ModeDomain Names VTP Configuration GuidelinesVTP Configuration in Vlan Database Configuration Mode Passwords14-9 Configuring a VTP ServerConfiguration Requirements VTP VersionVtp server Vtp password passwordVtp password password Show vtp status14-11 Configuring a VTP ClientVtp mode client Switch# vlan database14-12 Disabling VTP VTP Transparent ModeVtp version Enabling VTP Version14-13 14-14 Adding a VTP Client Switch to a VTP DomainEnabling VTP Pruning Vtp pruning14-15 14-16 Monitoring VTPUnderstanding Voice Vlan Configuring Voice Vlan15-1 Cisco IP Phone Data Traffic Cisco IP Phone Voice Traffic15-2 15-3 Configuring Voice VlanDefault Voice Vlan Configuration Voice Vlan Configuration Guidelines15-4 Configuring a Port Connected to a Cisco 7960 IP Phone15-5 Configuring Cisco IP Phone Voice Traffic15-6 Configuring the Priority of Incoming Data Frames15-7 Displaying Voice Vlan15-8 Understanding Private VLANs Configuring Private VLANs16-1 Private-VLAN Domain 16-216-3 IP Addressing Scheme with Private VLANsPrivate-VLAN Interaction with Other Features Private VLANs across Multiple Switches16-4 Private VLANs and SVIs Private VLANs and Unicast, Broadcast, and Multicast Traffic16-5 16-6 Configuring Private VLANsTasks for Configuring Private VLANs Private VLANs and Switch Stacks16-7 Default Private-VLAN ConfigurationPrivate-VLAN Configuration Guidelines Secondary and Primary Vlan Configuration16-8 Private-VLAN Port Configuration16-9 Limitations with Other Features16-10 Configuring and Associating VLANs in a Private VlanShow interfaces status Show vlan private-vlan type16-11 Primaryvlanid secondaryvlanid Configuring a Layer 2 Interface as a Private-VLAN Host PortSwitchport private-vlan host-association Switch# show interfaces gigabitethernet1/0/22 switchport16-13 Switchport mode private-vlan promiscuousSwitchport private-vlan mapping primaryvlanid Add remove secondaryvlanlistShow interface private-vlan mapping Switch# show interfaces private-vlan mappingInterface vlan primaryvlanid Private-vlan mapping add remove16-15 Monitoring Private VLANs16-16 Understanding Ieee 802.1Q Tunneling Configuring Ieee 802.1Q and Layer 2 Protocol Tunneling17-1 17-2 Ieee 802.1Q Tunnel Ports in a Service-Provider Network17-3 Native VLANs Configuring Ieee 802.1Q TunnelingDefault Ieee 802.1Q Tunneling Configuration Ieee 802.1Q Tunneling Configuration Guidelines17-5 System MTU17-6 Ieee 802.1Q Tunneling and Other FeaturesShow vlan dot1q tag native Configuring an Ieee 802.1Q Tunneling PortVlan dot1q tag native Show dot1q-tunnel17-8 Understanding Layer 2 Protocol TunnelingLayer 2 Protocol Tunneling 17-917-10 Configuring Layer 2 Protocol Tunneling17-11 Default Layer 2 Protocol Tunneling Configuration17-12 Layer 2 Protocol Tunneling Configuration Guidelines17-13 Configuring Layer 2 Protocol TunnelingPagp lacp udld Configuring Layer 2 Tunneling for EtherChannelsConfiguring the SP Edge Switch L2protocol-tunnel point-to-point17-15 17-16 Configuring the Customer SwitchSwitchconfig# interface port-channel Switchconfig-if#channel-group 1 mode desirable17-17 17-18 Monitoring and Maintaining Tunneling StatusUnderstanding Spanning-Tree Features Configuring STP18-1 18-2 STP Overview18-3 Spanning-Tree Topology and BPDUs18-4 Bridge ID, Switch Priority, and Extended System ID32768 16384 8192 4096 2048 1024 512 256 128 Switch Priority ValueSpanning-Tree Interface States Bit18-6 2illustrates how an interface moves through the statesForwarding State Blocking StateListening State Learning StateDisabled State How a Switch or Port Becomes the Root Switch or Root Port18-8 18-9 Spanning Tree and Redundant ConnectivitySpanning-Tree Address Management Accelerated Aging to Retain ConnectivitySupported Spanning-Tree Instances Spanning-Tree Modes and Protocols18-10 Rapid PVST+ Spanning-Tree Interoperability and Backward CompatibilitySTP and Ieee 802.1Q Trunks VLAN-Bridge Spanning TreeSpanning Tree and Switch Stacks Configuring Spanning-Tree Features18-12 Spanning-Tree Configuration Guidelines Default Spanning-Tree Configuration18-13 18-14 18-15 Changing the Spanning-Tree Mode18-16 Configuring the Root SwitchDisabling Spanning Tree Show spanning-tree vlan vlan-id Verify your entries18-17 Spanning-tree vlan vlan-id root primaryDiameter net-diameter hello-time seconds Show spanning-tree detailDiameter net-diameter hello-time Configuring a Secondary Root SwitchConfiguring Port Priority Spanning-tree vlan vlan-id root secondaryShow spanning-tree vlan vlan-id Spanning-tree port-priority prioritySpanning-tree vlan vlan-id port-priority priority Show spanning-tree interface interface-idSpanning-tree vlan vlan-id cost cost Configuring Path CostPort-channel-number Spanning-tree cost costSpanning-tree vlan vlan-id priority priority Configuring the Switch Priority of a Vlan18-21 18-22 Configuring Spanning-Tree TimersConfiguring the Hello Time Spanning-tree vlan vlan-id hello-time secondsSpanning-tree vlan vlan-idmax-age seconds Configuring the Forwarding-Delay Time for a VlanConfiguring the Maximum-Aging Time for a Vlan Spanning-tree vlan vlan-id forward-time18-24 Configuring the Transmit Hold-CountDisplaying the Spanning-Tree Status Show spanning-tree detail Verify your entries19-1 Configuring MstpMultiple Spanning-Tree Regions Understanding Mstp19-2 Operations Within an MST Region IST, CIST, and CST19-3 19-4 Operations Between MST Regions19-5 Hop CountIeee 802.1s Terminology Cisco Prestandard Cisco StandardIeee 802.1s Implementation Boundary Ports19-6 Port Role Naming Change Interoperation Between Legacy and Standard Switches19-7 Detecting Unidirectional Link Failure Mstp and Switch Stacks19-8 19-9 Understanding RstpInteroperability with Ieee 802.1D STP Port Roles and the Active Topology19-10 Rapid Convergence19-11 Synchronization of Port RolesBit Function Bridge Protocol Data Unit Format and Processing19-12 19-13 Topology ChangesProcessing Superior Bpdu Information Processing Inferior Bpdu Information19-14 Configuring Mstp FeaturesMstp Configuration Guidelines Default Mstp Configuration19-15 Name name Specifying the MST Region Configuration and Enabling MstpSpanning-tree mst configuration Instance instance-id vlan vlan-rangeExit Spanning-tree mode mstRevision version Show pending19-18 Spanning-tree mst instance-id root primary19-19 Show spanning-tree mst interface interface-id Spanning-tree mst instance-id port-priority priority19-20 19-21 Spanning-tree mst instance-id cost cost19-22 Configuring the Switch PriorityConfiguring the Hello Time Spanning-tree mst instance-id priority priorityShow spanning-tree mst Configuring the Forwarding-Delay TimeShow spanning-tree mst Verify your entries Spanning-tree mst forward-time secondsSpanning-tree mst max-age seconds Configuring the Maximum-Aging TimeConfiguring the Maximum-Hop Count Specifying the Link Type to Ensure Rapid Transitions19-25 Designating the Neighbor TypeRestarting the Protocol Migration Process Displaying the MST Configuration and Status19-26 Understanding Optional Spanning-Tree Features Configuring Optional Spanning-Tree Features20-1 Understanding Bpdu Guard Understanding Port Fast20-2 Understanding UplinkFast Understanding Bpdu Filtering20-3 20-4 Switches in a Hierarchical Network20-5 Understanding Cross-Stack UplinkFast20-6 How Csuf WorksEvents that Cause Fast Convergence Understanding BackboneFast20-7 BackboneFast Example Before Indirect Link Failure 20-820-9 Adding a Switch in a Shared-Medium TopologyUnderstanding Root Guard Understanding EtherChannel Guard20-10 20-11 Understanding Loop Guard20-12 Default Optional Spanning-Tree ConfigurationOptional Spanning-Tree Configuration Guidelines Enabling Port FastPortfast Spanning-tree portfast trunk interface configurationEnabling Bpdu Guard Spanning-tree portfast trunkEnabling Bpdu Filtering Spanning-tree portfast Enable the Port Fast feature20-14 20-15 Enabling UplinkFast for Use with Redundant LinksEnabling BackboneFast Spanning-tree uplinkfast max-update-rateUplinkfast command Enabling Cross-Stack UplinkFast20-17 Spanning-tree backbonefast Enable BackboneFastEnabling EtherChannel Guard Show spanning-tree summary Verify your entriesEnabling Loop Guard Enabling Root Guard20-18 20-19 20-20 21-1 Flex LinksVlan Flex Link Load Balancing and Support Switchport backup interface preemption delay commands21-2 21-3 MAC Address-Table Move Update21-4 MAC Address-Table Move Update ExampleDefault Configuration Configuration Guidelines21-5 Switch# show interface switchport backup Configuring Flex LinksSwitchport backup interface interface-id Show interface interface-id switchport backup21-7 Switchport backup interface interface-id preemptionMode forced bandwidth off Delay delay-timeSwitch#show interfaces switchport backup Configuring Vlan Load Balancing on Flex LinksSwitchport backup interface interface-id prefer vlan Show interfaces interface-id switchport backup21-9 Configuring the MAC Address-Table Move Update FeatureSwitchport backup interface interface-idmmu Primary vlan vlan-id21-10 End Return to global configuration modeSwitchconf# mac address-table move update transmit Switch# show mac-address-table move update21-11 Monitoring Flex Links and the MAC Address-Table Move Update21-12 Understanding Dhcp Features Configuring Dhcp Features and IP Source Guard22-1 22-2 Dhcp ServerDhcp Relay Agent Dhcp Snooping22-3 Option-82 Data InsertionDhcp Relay Agent in a Metropolitan Ethernet Network 22-422-5 Remote ID Suboption Frame Format22-6 Cisco IOS Dhcp Server DatabaseDhcp Snooping Binding Database Release22-7 22-8 Configuring Dhcp FeaturesDhcp Snooping and Switch Stacks Default Dhcp Configuration22-9 Dhcp Snooping Configuration GuidelinesDhcp Server and Switch Stacks Configuring the Dhcp Server22-10 22-11 Configuring the Dhcp Relay AgentSpecifying the Packet Forwarding Address Ip helper-address addressInterface range port-range Switchport mode accessSwitchport access vlan vlan-id Enabling Dhcp Snooping and Option22-13 Ip dhcp snooping database Enabling Dhcp Snooping on Private VLANsEnabling the Cisco IOS Dhcp Server Database Enabling the Dhcp Snooping Binding Database Agent22-15 Displaying Dhcp Snooping InformationSource IP Address Filtering Understanding IP Source Guard22-16 Source IP and MAC Address Filtering Configuring IP Source GuardDefault IP Source Guard Configuration IP Source Guard Configuration Guidelines22-18 Enabling IP Source Guard22-19 Displaying IP Source Guard Information22-20 Understanding Dynamic ARP Inspection Configuring Dynamic ARP Inspection23-1 ARP Cache Poisoning 23-223-3 Interface Trust States and Network SecurityRelative Priority of ARP ACLs and Dhcp Snooping Entries Rate Limiting of ARP Packets23-4 23-5 Configuring Dynamic ARP InspectionDefault Dynamic ARP Inspection Configuration Logging of Dropped Packets23-6 Dynamic ARP Inspection Configuration Guidelines23-7 Configuring Dynamic ARP Inspection in Dhcp EnvironmentsShow cdp neighbors Ip arp inspection vlan vlan-range23-8 Configuring ARP ACLs for Non-DHCP Environments23-9 Specified with the ip arp inspection vlan logging Show arp access-list acl-nameLimiting the Rate of Incoming ARP Packets No ip arp inspection trust23-11 Performing Validation ChecksShow ip arp inspection vlan Configuring the Log BufferIp arp inspection validate Src-mac dst-mac ipNumber logs number interval Ip arp inspection log-buffer entries23-13 23-14 Displaying Dynamic ARP Inspection InformationShow ip arp inspection log Clear ip arp inspection statisticsShow ip arp inspection statistics vlan Clear ip arp inspection log23-16 24-1 Configuring Igmp Snooping and MVR24-2 Understanding Igmp SnoopingJoining a Multicast Group Igmp Versions24-3 24-4 224.1.2.324-5 Leaving a Multicast Group24-6 Igmp Configurable-Leave TimerImmediate Leave Igmp Report SuppressionPIM-DVMRP Configuring Igmp SnoopingIgmp Snooping and Switch Stacks Default Igmp Snooping ConfigurationIp igmp snooping vlan vlan-id Enabling or Disabling Igmp Snooping24-8 Show ip igmp snooping Setting the Snooping MethodIp igmp snooping vlan vlan-id mrouter Learn cgmp pim-dvmrpShow ip igmp snooping mrouter vlan vlan-id Configuring a Multicast Router Port24-10 Show ip igmp snooping groups Configuring a Host Statically to Join a GroupEnabling Igmp Immediate Leave Ip igmp snooping vlan vlan-id static ipaddress24-12 Configuring the Igmp Leave TimerCount Configuring TCN-Related CommandsRecovering from Flood Mode Controlling the Multicast Flooding Time After a TCN EventNo ip igmp snooping tcn flood Disabling Multicast Flooding During a TCN Event24-14 24-15 Configuring the Igmp Snooping QuerierNo ip igmp snooping report-suppression Disabling Igmp Report Suppression24-16 24-17 Displaying Igmp Snooping Information24-18 Understanding Multicast Vlan Registration24-19 Using MVR in a Multicast Television Application24-20 Configuring MVRDefault MVR Configuration MVR24-21 MVR Configuration Guidelines and LimitationsConfiguring MVR Global Parameters Mvr Enable MVR on the switch24-22 Configuring MVR InterfacesShow mvr interface Show mvr members Mvr type source receiverMvr immediate Show mvrDisplaying MVR Information Configuring Igmp Filtering and Throttling24-24 Configuring Igmp Profiles Default Igmp Filtering and Throttling Configuration24-25 Show ip igmp profile profile number Ip igmp profile profile numberPermit deny Range ip multicast addressIp igmp filter profile number Setting the Maximum Number of Igmp GroupsSwitch# show ip igmp profile Applying Igmp ProfilesInterface-id Configuring the Igmp Throttling ActionShow running-config interface Verify the configuration EtherChannel group or a EtherChannel interfaceShow ip igmp profile profile Displaying Igmp Filtering and Throttling ConfigurationIp igmp max-groups action deny Replace24-30 Understanding MLD Snooping Configuring IPv6 MLD Snooping25-1 25-2 25-3 MLD MessagesMLD Queries Multicast Client Aging Robustness25-4 Multicast Router DiscoveryMLD Reports MLD Done Messages and Immediate-Leave25-5 Configuring IPv6 MLD SnoopingMLD Snooping in Switch Stacks Topology Change Notification ProcessingMLD Snooping Configuration Guidelines Default MLD Snooping Configuration25-6 25-7 Enabling or Disabling MLD SnoopingIpv6 mld snooping Ipv6 mld snooping vlan vlan-idShow ipv6 mld snooping multicast-address vlan Configuring a Static Multicast GroupIpv6 mld snooping vlan vlan-id static Show ipv6 mld snooping multicast-address user25-9 Enabling MLD Immediate LeaveIpv6 mld snooping vlan vlan-id mrouter Show ipv6 mld snooping mrouter vlan vlan-id25-10 Configuring MLD Snooping QueriesDisabling MLD Listener Message Suppression Displaying MLD Snooping Information25-11 25-12 Show ipv6 mld snooping querier vlan vlan-idVlan-id count dynamic user Vlan-id ipv6-multicast-address26-1 Configuring Port-Based Traffic ControlConfiguring Storm Control Understanding Storm ControlBroadcast Storm Control Example 26-2Configuring Storm Control and Threshold Levels Default Storm Control Configuration26-3 Storm-control action shutdown trap Storm-control broadcast multicastUnicast level level level-low bps bps Bps-low pps pps pps-lowMulticast unicast Configuring Protected PortsDefault Protected Port Configuration Show storm-control interface-id broadcast26-6 Configuring Port BlockingProtected Port Configuration Guidelines Configuring a Protected Port26-7 Configuring Port SecurityDefault Port Blocking Configuration Blocking Flooded Traffic on an InterfaceSecure MAC Addresses Understanding Port Security26-8 26-9 Security Violations26-10 Default Port Security ConfigurationPort Security Configuration Guidelines Forwarded1 Trap Message Message2 Increments26-11 26-12 Enabling and Configuring Port Security26-13 Switchport port-security violationProtect restrict shutdown Shutdown vlan26-14 Switchconfig-if#switchport port-security violation restrict Switchconfig-if#switchport port-securitySwitchconfig-if#switchport port-security maximum Switchconfig-if#switchport port-security mac-address sticky26-16 Enabling and Configuring Port Security Aging26-17 Port Security and Switch StacksSwitchconfig# interface GigabitEthernet 1/0/8 Port Security and Private VLANs26-18 Displaying Port-Based Traffic Control SettingsShow port-security interface interface-idaddress Show port-security interface interface-idvlanUnderstanding CDP Configuring CDP27-1 Configuring the CDP Characteristics Configuring CDPCDP and Switch Stacks Default CDP ConfigurationShow cdp Disabling and Enabling CDPCdp holdtime seconds Cdp advertise-v227-4 No cdp enable Disable CDP on the interfaceCdp enable Enable CDP on the interface after disabling it Disabling and Enabling CDP on an Interface27-5 Monitoring and Maintaining CDP27-6 28-1 Configuring Lldp and LLDP-MEDUnderstanding Lldp and LLDP-MED Understanding Lldp28-2 Understanding LLDP-MED28-3 Configuring Lldp and LLDP-MEDDefault Lldp Configuration Configuring Lldp Characteristics28-4 Disabling and Enabling Lldp Globally28-5 Disabling and Enabling Lldp on an InterfaceLldp med-tlv-select tlv Specify the TLV to enable Configuring LLDP-MED TLVsTLV, and enter interface configuration mode No lldp med-tlv-select tlv Specify the TLV to disable28-7 Monitoring and Maintaining Lldp and LLDP-MED28-8 29-1 Configuring UdldUnderstanding Udld Modes of Operation29-2 Methods to Detect Unidirectional Links29-3 Configuring Udld29-4 Default Udld ConfigurationShow udld Udld aggressive enable message timeMessage-timer-interval Enabling Udld GloballyUdld port aggressive Resetting an Interface Disabled by UdldUdld reset Show udld Enabling Udld on an Interface29-7 Displaying Udld Status29-8 Understanding Span and Rspan Configuring Span and Rspan30-1 30-2 Local Span30-3 Remote SpanSpan Sessions Span and Rspan Concepts and Terminology30-4 30-5 Monitored Traffic30-6 Source PortsVlan Filtering Source VLANs30-7 30-8 Destination PortRspan Vlan Span and Rspan Interaction with Other Features30-9 Span and Rspan and Switch Stacks Configuring Span and Rspan30-10 30-11 Default Span and Rspan ConfigurationConfiguring Local Span Span Configuration Guidelines30-12 Creating a Local Span SessionShow monitor session sessionnumber Monitor session sessionnumberDestination interface interface-id Encapsulation replicate30-14 Monitor session sessionnumber filter vlan Specifying VLANs to Filter30-15 30-16 Configuring RspanRspan Configuration Guidelines Be a Vlan30-17 Configuring a Vlan as an Rspan Vlan30-18 Creating an Rspan Source SessionInterfaces port-channelport-channel-number. Valid Destination remote vlan vlan-idRemote vlan vlan-id Creating an Rspan Destination Session30-19 30-20 Untagged vlan vlan-id or vlan vlan-id- Forward incoming Ingress dot1q vlan vlan-id isl untagged30-21 30-22 Show monitor session sessionnumber30-23 Displaying Span and Rspan Status30-24 Understanding Rmon Configuring Rmon31-1 31-2 Configuring RmonConfiguring Rmon Alarms and Events Default Rmon Configuration31-3 Add an event in the Rmon event table that is Rmon event number description string log owner string31-4 Show rmon history Collecting Group History Statistics on an InterfaceCollecting Group Ethernet Statistics on an Interface Rmon collection history index31-6 Displaying Rmon StatusRmon collection stats index owner ownername Show rmon statisticsUnderstanding System Message Logging Configuring System Message Logging32-1 System Log Message Format Configuring System Message Logging32-2 Text string that uniquely describes the message Hhmmss short uptime32-3 Disabling Message Logging Default System Message Logging ConfigurationNo logging console Disable message logging Show running-config Verify your entries Show logging32-5 Setting the Message Display Destination DeviceLogging buffered size Logging hostSession to see the debugging messages Synchronizing Log MessagesLogging file flash filename Terminal monitorAll limit number-of-buffers Line console vty line-numberLine vty Logging synchronous level severity-levelEnabling and Disabling Sequence Numbers in Log Messages Enabling and Disabling Time Stamps on Log Messages32-8 Logging trap level Defining the Message Severity LevelLogging console level Logging monitor level32-10 Level Description Syslog Definition32-11 Enabling the Configuration-Change LoggerLogging history level Logging history size numberLogging Messages to a Unix Syslog Daemon Configuring Unix Syslog Servers32-12 32-13 Configuring the Unix System Logging FacilityLogging facility facility-type Facility-type keywordsFacility Type Keyword Description Displaying the Logging Configuration32-14 Understanding Snmp Configuring Snmp33-1 33-2 Snmp VersionsOperation Description Model Level Authentication Encryption ResultSnmp Manager Functions DESSnmp Agent Functions Using Snmp to Access MIB Variables33-4 33-5 Snmp NotificationsSVI Configuring SnmpSnmp ifIndex MIB Object Values IfIndex RangeSnmp Configuration Guidelines Default Snmp Configuration33-7 33-8 Configuring Community StringsNo snmp-server Disable the Snmp agent operation Disabling the Snmp AgentPermit source source-wildcard View-name ro rw access-list-numberAccess-list access-list-number deny Snmp-server community string view33-10 Configuring Snmp Groups and UsersSnmp-server engineID local engineid-string Snmp-server engineID local33-11 Write writeview notify notifyview accessSnmp-server group groupname v1 v2c Auth noauth priv read readviewNotification Type Keyword Description Configuring Snmp NotificationsRemote host udp-port port v1 access Encrypted access access-list auth md533-13 33-14 Notification-types Setting the Agent Contact and Location Information33-12 , or enter snmp-server enable traps ? Enable traps command for each trap typeSnmp-server tftp-server-list Switchconfig# snmp-server community publicLimiting Tftp Servers Used Through Snmp Snmp Examples33-17 Displaying Snmp Status33-18 Understanding ACLs Configuring Network Security with ACLs34-1 34-2 Supported ACLs34-3 Port ACLs34-4 Router ACLsVlan Maps Handling Fragmented and Unfragmented Traffic34-5 34-6 ACLs and Switch Stacks34-7 Configuring IPv4 ACLs34-8 Access List NumbersAccess List Number Type Supported Creating Standard and Extended IPv4 ACLs34-9 ACL LoggingSource source-wildcard log Access-list access-list-number deny permitShow access-lists number name Creating a Numbered Standard ACL34-11 Creating a Numbered Extended ACL34-12 34-13 34-14 Creating Named Standard and Extended ACLs Resequencing ACEs in an ACL34-15 Tos tos established log time-range Ip access-list standard nameIp access-list extended name Any log34-17 Using Time Ranges with ACLs34-18 Absolute start time datePeriodic weekdays weekend daily Show time-range34-19 Switch# show ip access-listsApplying an IPv4 ACL to a Terminal Line Including Comments in ACLs34-20 Access-class access-list-numberApplying an IPv4 ACL to an Interface Out34-21 Ip access-group access-list-numberHardware and Software Treatment of IP ACLs IPv4 ACL Configuration Examples34-22 Switchconfig# access-list 106 permit ip any 172.20.128.64 Switchconfig# access-list 6 permit 172.20.128.6434-23 Extended ACLs Numbered ACLs34-24 34-25 Named ACLsTime Range Applied to an IP ACL Commented IP ACL EntriesSwitchconfig-if#ip access-group ext1 Switch# show logging34-26 34-27 Creating Named MAC Extended ACLs34-28 Applying a MAC ACL to a Layer 2 InterfaceACL Configuring Vlan MapsMac access-group name Show mac access-group interface interface-id34-30 Vlan Map Configuration GuidelinesMatch ip mac address name Vlan access-map name numberCreating a Vlan Map Action drop forward34-32 Examples of ACLs and Vlan Maps34-33 Vlan filter mapname vlan-list list Using Vlan Maps in Your NetworkWiring Closet Configuration Applying a Vlan Map to a VlanSwitchconfig# vlan filter map2 vlan Denying Access to a Server on Anothera VlanSwitchconfig# vlan access-map map2 Switchconfig# ip access-list extended matchall34-36 Using Vlan Maps with Router ACLs34-37 Vlan Maps and Router ACL Configuration Guidelines34-38 ACLs and Switched PacketsExamples of Router ACLs and Vlan Maps Applied to VLANs ACLs and Bridged Packets34-39 ACLs and Routed Packets34-40 Displaying IPv4 ACL ConfigurationShow ip access-lists number name ACLs and Multicast Packets34-41 Show running-config interface interface-idShow mac access-group interface interface-id Show ip interface interface-id34-42 35-1 Configuring IPv6 ACLs35-2 Understanding IPv6 ACLs35-3 Supported ACL FeaturesIPv6 ACLs and Switch Stacks IPv6 ACL Limitations35-4 Configuring IPv6 ACLsDefault IPv6 ACL Configuration Interaction with Other Features and SwitchesCreating IPv6 ACLs Ipv6 access-list access-list-name35-5 35-6 Dscp value fragments logLog-input routing sequence Value time-range name35-7 35-8 Ipv6 traffic-filter access-list-nameApplying an IPv6 ACL to an Interface Ipv6 address ipv6-address35-9 Show access-listsShow ipv6 access-list access-list-name Displaying IPv6 ACLs35-10 36-1 Configuring QoS36-2 Understanding QoS36-3 Basic QoS ModelBasic QoS Model 36-436-5 ClassificationCheck if packet came with CoS label tag Yes 36-6Classification Based on Class Maps and Policy Maps Classification Based on QoS ACLs36-7 36-8 Policing and Marking36-9 Policing on Physical Ports36-10 Policing on SVIs36-11 Policing and Marking Flowchart on SVIs36-12 Mapping Tables36-13 Queueing and Scheduling OverviewSRR Shaping and Sharing Weighted Tail Drop36-14 36-15 Queueing and Scheduling on Ingress Queues36-16 Queue Type Function36-17 WTD Thresholds36-18 Queueing and Scheduling on Egress Queues36-19 36-20 Buffer and Memory Allocation36-21 Packet Modification36-22 Configuring Auto-QoS36-23 Generated Auto-QoS Configuration36-24 Description Automatically Generated Command36-25 Or shared on the egress queues mapped to the port Switch automatically configures the egress queue bufferSizes. It configures the bandwidth and the SRR mode shaped If you entered the auto qos voip trust command, the switchAuto-QoS Configuration Guidelines Effects of Auto-QoS on the Configuration36-27 Show auto qos interface interface-id Enabling Auto-QoS for VoIPAuto qos voip cisco-phone Cisco-softphone trust36-29 36-30 Auto-QoS Configuration ExampleShow auto qos Cdp enableDebug auto qos Auto qos voip trustDisplaying Auto-QoS Information Configuring Standard QoS36-32 Default Ingress Queue Configuration Default Standard QoS Configuration36-33 Dscp Value Queue ID -Threshold ID Default Egress Queue Configuration36-34 Applying QoS on Interfaces Standard QoS Configuration GuidelinesDefault Mapping Table Configuration QoS ACL GuidelinesGeneral QoS Guidelines Policing Guidelines36-36 Enabling VLAN-Based QoS on Physical Ports Enabling QoS Globally36-37 Configuring the Trust State on Ports within the QoS Domain Configuring Classification Using Port Trust States36-38 15 Port Trusted States within the QoS Domain 36-3936-40 Configuring the CoS Value for an InterfaceMls qos trust cos dscp ip-precedence Show mls qos interfaceMls qos cos default-cos override Configuring a Trusted Boundary to Ensure Port Security36-41 36-42 Enabling Dscp Transparency ModeMls qos trust dscp Mls qos trust device cisco-phone36-43 No mls qos rewrite ip dscp36-44 Mls qos map dscp-mutationMls qos dscp-mutation Show mls qos maps dscp-mutationSwitchconfig-if#mls qos dscp-mutation gi1/0/2-mutation Configuring a QoS Policy36-45 36-46 Classifying Traffic by Using ACLsSource-wildcard Switchconfig# access-list 100 permit ip any any dscpSwitchconfig# access-list 102 permit pim any 224.0.0.2 dscp Permit protocol source source-wildcard36-48 Mac access-list extended nameMatch-any keywords Classifying Traffic by Using Class MapsClass-map match-all match-any Is match-allShow class-map Match access-group acl-index-or-nameIp dscp dscp-list ip precedence Ip-precedence-list36-51 Class class-map-name Policy-map policy-map-name36-52 36-53 Show policy-map policy-map-nameclass Service-policy input policy-map-name36-54 36-55 Switchconfig# policy-map macpolicy1Switchconfig-pmap#class macclass2 maclist2 Switchconfig-if#service-policy input macpolicy136-56 Traffic by Using Class Maps section on36-57 36-58 Police rate-bps burst-byte exceed-actionDrop policed-dscp-transmit Exceed-action policed-dscp-transmit keywords to mark down36-59 Service-policy policy-map-nameShow policy-map policy-map-nameclass Service-policy input policy-map-nameShow mls qos vlan-based Policed-dscp-transmit Mls qos aggregate-policerAggregate-policer-name rate-bps burst-byte Exceed-action dropShow mls qos aggregate-policer Only one policy map per ingress port is supportedAggregate-policer-name CoS Value Dscp Value Configuring Dscp MapsConfiguring the CoS-to-DSCP Map Switchconfig-pmap-c#police aggregate transmit136-64 Configuring the IP-Precedence-to-DSCP MapMls qos map cos-dscp dscp1...dscp8 IP Precedence Value Dscp Value36-65 Configuring the Policed-DSCP MapShow Configuring the DSCP-to-CoS MapDscp Value CoS Value 36-6636-67 Configuring the DSCP-to-DSCP-Mutation MapMls qos map dscp-cos dscp-list to cos Show mls qos maps dscp-to-cosSwitch# show mls qos maps dscp-mutation mutation1 Switchconfig-if#mls qos dscp-mutation mutation136-68 36-69 Configuring Ingress Queue CharacteristicsShow mls qos maps Mls qos srr-queue input dscp-mapMls qos srr-queue input cos-map Mls qos srr-queue input thresholdShow mls qos interface buffer Allocating Buffer Space Between the Ingress QueuesAllocating Bandwidth Between the Ingress Queues Mls qos srr-queue input buffersShow mls qos interface queueing Configuring the Ingress Priority QueueWeight1 weight2 Mls qos srr-queue input bandwidthPriority-queue queue-id bandwidth Configuring Egress Queue CharacteristicsWeight Mls qos srr-queue input36-74 Queue-set qset-id Mls qos queue-set output qset-id36-75 36-76 Mls qos srr-queue output cos-map Mls qos srr-queue output dscp-map36-77 Queueing Configuring SRR Shaped Weights on Egress QueuesSrr-queue bandwidth shape weight1 Weight2 weight3 weight436-79 Configuring SRR Shared Weights on Egress QueuesConfiguring the Egress Expedite Queue Srr-queue bandwidth share weight136-80 Mls qos Enable QoS on a switchSrr-queue bandwidth limit weight1 Limiting the Bandwidth on an Egress Interface36-81 Displaying Standard QoS Information36-82 Show running-config include rewriteUnderstanding EtherChannels Configuring EtherChannels and Link-State Tracking37-1 37-2 EtherChannel Overview37-3 Single-Switch EtherChannel37-4 Port-Channel Interfaces37-5 Port Aggregation ProtocolAuto PAgP Interaction with Other FeaturesMode Description PAgP Modes37-7 Lacp Interaction with Other FeaturesLink Aggregation Control Protocol Lacp ModesLoad-Balancing and Forwarding Methods EtherChannel On Mode37-8 37-9 37-10 EtherChannel and Switch StacksDefault EtherChannel Configuration Configuring EtherChannels37-11 37-12 EtherChannel Configuration Guidelines37-13 Configuring Layer 2 EtherChannelsActive passive Auto non-silent desirable non-silent on37-14 37-15 Configuring Layer 3 EtherChannelsSwitchconfig-if-range#channel-group 5 mode active Creating Port-Channel Logical InterfacesNo ip address Configuring the Physical InterfacesInterface port-channel port-channel-number Show etherchannel channel-group-number detail37-17 Partner that is PAgP capable, configure the switch port forFor channel-group-number, the range is 1 to 48. This number Must be the same as the port-channel-number logical port37-18 Configuring EtherChannel Load-BalancingPort-channel load-balance dst-ip dst-mac Src-dst-ip src-dst-mac src-ip src-macShow etherchannel load-balance Verify your entries Configuring the PAgP Learn Method and Priority37-19 Show pagp channel-group-number internal Configuring Lacp Hot-Standby PortsPagp learn-method physical-port Pagp port-priority priorityShow running-config Verify your entries Show lacp sys-id Configuring the Lacp System Priority37-21 Internal Configuring the Lacp Port PriorityLacp port-priority priority Show lacp channel-group-numberUnderstanding Link-State Tracking Displaying EtherChannel, PAgP, and Lacp Status37-23 37-24 37-25 Configuring Link-State Tracking37-26 Default Link-State Tracking ConfigurationLink-State Tracking Configuration Guidelines Configuring Link-State Tracking37-27 Switch show link state groupSwitch show link state group detail Displaying Link-State Tracking Status37-28 38-1 Configuring IP Unicast RoutingTypes of Routing Understanding IP Routing38-2 38-3 IP Routing and Switch Stacks38-4 Configuring IP Addressing Steps for Configuring Routing38-5 38-6 Default Addressing ConfigurationARP Irdp38-7 Show running-config Verify your entryAssigning IP Addresses to Network Interfaces Use of Subnet Zero38-8 Classless RoutingNo ip classless Disable classless routing behavior Configuring Address Resolution Methods38-9 Arp ip-address hardware-address type Define a Static ARP Cache38-10 38-11 Set ARP EncapsulationProxy ARP Routing Assistance When IP Routing is DisabledEnable Proxy ARP Default Gateway38-13 Icmp Router Discovery Protocol Irdp38-14 Configuring Broadcast Packet HandlingIp forward-protocol udp port nd sdns Ip directed-broadcast access-list-number38-15 38-16 Forwarding UDP Broadcast Packets and Protocols38-17 Establishing an IP Broadcast AddressFlooding IP Broadcasts Ip broadcast-address ip-addressClear ip route network mask Monitoring and Maintaining IP AddressingClear arp-cache Clear host name38-19 Enabling IP Unicast Routing38-20 Configuring RIPNetwork network number Default RIP ConfigurationConfiguring Basic RIP Parameters Router rip38-22 Ip rip authentication mode text md5 Configuring RIP AuthenticationConfiguring Summary Addresses and Split Horizon Ip rip authentication key-chain name-of-chainNo ip split horizon Configuring Split HorizonSwitchconfig-router#neighbor 2.2.2.2 peer-group mygroup Ip summary-address rip ip address ip-network maskNo ip split-horizon Configuring Ospf38-25 38-26 Default Ospf Configuration38-27 Ospf Nonstop Forwarding38-28 Ospf NSF AwarenessConfiguring Ospf Interfaces Configuring Basic Ospf Parameters38-29 38-30 38-31 Configuring Ospf Area Parameters38-32 Configuring Other Ospf Parameters38-33 38-34 Configuring a Loopback InterfaceChanging LSA Group Pacing Ip address address maskMonitoring Ospf Configuring Eigrp38-35 38-36 38-37 Default Eigrp Configuration38-38 Eigrp Nonstop ForwardingEigrp log-neighbor-changes Configuring Basic Eigrp ParametersRouter eigrp autonomous-system Network network-number38-40 Configuring Eigrp InterfacesNo auto-summary Ip summary-address eigrpShow ip eigrp interface Configuring Eigrp Route AuthenticationIp hello-interval eigrp autonomous-system-number No ip split-horizon eigrp autonomous-system-number38-42 Eigrp Stub RoutingMonitoring and Maintaining Eigrp Configuring BGP38-43 EBGP, IBGP, and Multiple Autonomous Systems 38-4438-45 Default BGP Configuration38-46 38-47 Nonstop Forwarding AwarenessRoute-map route-map-name Enabling BGP RoutingRouter bgp autonomous-system Network network-number mask network-mask38-49 38-50 Switchconfig-router#neighbor 192.208.10.2 remote-asSwitch# show ip bgp neighbors Managing Routing Policy ChangesShow ip bgp Type of Reset Advantages DisadvantagesShow ip bgp neighbors Clear ip bgp * address38-52 Configuring BGP Decision Attributes38-53 Configuring BGP Filtering by Neighbor Configuring BGP Filtering with Route Maps38-54 Show ip bgp neighbors paths Ip as-path access-list access-list-numberOut weight weight Route-map map-tag in out38-56 Configuring Prefix Lists for BGP FilteringSend-community Configuring BGP Community FilteringIp community-listcommunity-list-number Permit deny community-numberShow ip bgp community Configuring BGP Neighbors and Peer GroupsSet comm-list list-num delete Ip bgp-community new-format38-59 38-60 Configuring Aggregate AddressesConfiguring BGP Route Reflectors Configuring Routing Domain Confederations38-61 No bgp client-to-client reflection Configuring Route DampeningRoute-reflector-client Bgp cluster-id cluster-id38-63 Monitoring and Maintaining BGP38-64 Configuring Multi-VRF CE38-65 Understanding Multi-VRF CE38-66 38-67 Default Multi-VRF CE ConfigurationMulti-VRF CE Configuration Guidelines VRFIp vrf forwarding vrf-name Configuring VRFsRoute-target export import both Import map route-mapRedistribute bgp Configuring a VPN Routing SessionShow ip vrf brief detail interfaces Log-adjacency-changesMulti-VRF CE Configuration Example Configuring BGP PE to CE Routing Sessions38-70 VPN2 CE1 38-7138-72 Configuring Switch a38-73 Switchconfig-router-af#network 8.8.2.0 maskSwitchconfig-router-af#network 8.8.1.0 mask Switchconfig-if#ip address 208.0.0.2038-74 Router# configure terminalDisplaying Multi-VRF CE Status Configuring Unicast Reverse Path Forwarding38-75 Configuring Distributed Cisco Express Forwarding Configuring Protocol-Independent Features38-76 38-77 Configuring the Number of Equal-Cost Routing PathsShow ip route Configuring Static Unicast RoutesRouter bgp rip ospf eigrp Maximum-paths maximum38-79 Specifying Default Routes and NetworksRoute Source Default Distance Ip default-network network number Specify a default network38-80 Using Route Maps to Redistribute Routing Information38-81 38-82 38-83 Configuring Policy-Based Routing38-84 PBR Configuration Guidelines38-85 Enabling PBR38-86 Ip policy route-map map-tagIp route-cache policy Ip local policy route-map map-tagFiltering Routing Information Setting Passive Interfaces38-87 38-88 Controlling Advertising and Processing in Routing UpdatesFiltering Sources of Routing Information Router bgp rip eigrp38-89 Managing Authentication KeysDistance weight ip-address ip-address mask Ip access list38-90 Monitoring and Maintaining the IP Network38-91 38-92 Understanding IPv6 Configuring IPv6 Unicast Routing39-1 39-2 IPv6 AddressesBit Wide Unicast Addresses Supported IPv6 Unicast Routing Features39-3 Neighbor Discovery DNS for IPv6Path MTU Discovery for IPv6 Unicast ICMPv639-5 IPv6 ApplicationsDual IPv4 and IPv6 Protocol Stacks Unsupported IPv6 Unicast Routing Features39-6 Limitations IPv6 and Switch Stacks39-7 39-8 Dual IPv4-and IPv6 SDM Templates SDM Templates39-9 39-10 Configuring IPv6Configuring IPv6 Addressing and Enabling IPv6 Routing Default IPv6 Configuration39-11 39-12 39-13 Configuring IPv4 and IPv6 Protocol StacksIp routing Enable routing on the switch Switchconfig-if#ipv6 address 20010DB8c181/64 eui39-14 Show ipv6 interface interface-id Configuring IPv6 Icmp Rate LimitingConfiguring CEF and dCEF for IPv6 Ipv6 icmp error-interval interval bucketsize39-16 Configuring Static Routing for IPv639-17 Administrative distanceIpv6 route ipv6-prefix/prefix length Ipv6-address interface-id ipv6-addressInterface-id recursive detail Configuring RIP for IPv6Show ipv6 route static updated Show ipv6 static ipv6-address39-19 39-20 Configuring Ospf for IPv639-21 Displaying IPv6 Switch# show ipv6 interface39-22 39-23 Switch# show ipv6 cef /0Switch# show ipv6 protocols Switch# show ipv6 ripSwitch# show ipv6 traffic Switch# show ipv6 neighborsSwitch# show ipv6 static Switch# show ipv6 route39-25 39-26 Understanding Hsrp Configuring Hsrp and Enhanced Object Tracking40-1 40-2 40-3 Multiple HsrpHsrp and Switch Stacks Configuring Hsrp40-4 40-5 Default Hsrp ConfigurationHsrp Configuration Guidelines Enabling HsrpShow standby interface-id group Switch# show standbyStandby group-number ip ip-address Secondary40-7 Configuring Hsrp Priority40-8 Priority preempt delay delayStandby group-number priority Standby group-number track40-9 Configuring MhsrpConfiguring Hsrp Authentication and Timers Switchconfig-if#standby 2 ipHoldtime Standby group-number authentication stringStandby group-number timers hellotime Switchconfig-if#standby 1 authentication wordShow standby interface-idgroup brief detail Displaying Hsrp ConfigurationsConfiguring Hsrp Groups and Clustering Enabling Hsrp Support for Icmp Redirect MessagesUnderstanding Enhanced Object Tracking Configuring Enhanced Object Tracking40-12 40-13 Configuring Enhanced Object Tracking FeaturesTracking Interface Line-Protocol or IP Routing State Track object-number interfaceObject object-number not Configuring a Tracked ListSwitch# show track 33 Track Track track-numberlist boolean40-15 WeightThreshold weight up number Track track-numberlist thresholdThreshold percentage up number Track track-number list thresholdPercentage Object object-number40-17 Configuring Hsrp Object TrackingShow standby Configuring Other Tracking Characteristics40-18 Understanding Wccp Configuring Web Cache Services By Using41-1 41-2 Wccp Message Exchange41-3 Packet Redirection and Service GroupsWccp Negotiation MD5 Security41-4 Wccp and Switch StacksWccp Configuration Guidelines Configuring WccpUnsupported Wccp Features Default Wccp Configuration41-6 Enabling the Web Cache Service41-7 41-8 41-9 Switchconfig# interface range gigabitethernet1/0/3Switchconfig-if-range#switchport access vlan Monitoring and Maintaining Wccp41-10 Enabled / disabled42-1 Configuring IP Multicast RoutingIP Multicast Routing Protocols 42-2Igmp Version Understanding Igmp42-3 42-4 Understanding PIMPIM Versions PIM Modes42-5 PIM Stub Routing42-6 Auto-RPMulticast Forwarding and Reverse Path Check Bootstrap Router42-7 Network Port Understanding Dvmrp42-8 Understanding Cgmp Multicast Routing and Switch Stacks42-9 42-10 Configuring IP Multicast RoutingDefault Multicast Routing Configuration Multicast Routing Configuration GuidelinesPIMv1 and PIMv2 Interoperability Auto-RP and BSR Configuration Guidelines42-11 Ip multicast-routing distributed Configuring Basic Multicast Routing42-12 Sparse-dense-mode Configuring PIM Stub RoutingIp pim version 1 Ip pim dense-mode sparse-mode42-14 Configuring a Rendezvous PointManually Assigning an RP to Multicast Groups Ip pim passiveIp pim rp-address ip-address Access-list-number override42-15 42-16 Configuring Auto-RP42-17 Scope ttl group-list access-list-numberIp pim send-rp-announce interface-id Interval seconds42-18 Ip pim send-rp-discovery scope ttlShow ip pim rp mapping Show ip pim rpIp pim rp-announce-filter rp-list Access-list-number group-list42-19 Ip pim bsr-border Configuring PIMv2 BSR42-20 42-21 Ip multicast boundaryHash-mask-length priority Ip pim bsr-candidate interface-id42-22 Ip pim rp-candidate interface-id Group-list access-list-number42-23 Show ip pim rp-hash group Using Auto-RP and a BSRShow ip pim rp group-name Group-address mappingUnderstanding PIM Shared Tree and Source Tree Configuring Advanced PIM FeaturesTroubleshooting PIMv1 and PIMv2 Interoperability Problems Monitoring the RP Mapping InformationShared Tree and Source Tree Shortest-Path Tree 42-26Ip pim spt-threshold kbps infinity Delaying the Use of PIM Shortest-Path Tree42-27 Show ip igmp interface interface-id Configuring Optional Igmp FeaturesModifying the PIM Router-Query Message Interval Ip pim query-interval seconds42-29 Default Igmp ConfigurationConfiguring the Switch as a Member of a Group Ip igmp join-group group-address42-30 Controlling Access to IP Multicast GroupsIp igmp access-group access-list-number Show ip igmp interface interface-id Verify your entriesQuery-interval or the ip igmp query-max-response-time Changing the Igmp VersionModifying the Igmp Host-Query Message Interval Ip igmp version 142-32 Changing the Igmp Query Timeout for IGMPv2Ip igmp querier-timeout seconds Ip igmp query-interval seconds42-33 Configuring the Switch as a Statically Connected MemberChanging the Maximum Query Response Time for IGMPv2 Ip igmp query-max-response-time42-34 Configuring Optional Multicast Routing FeaturesEnabling Cgmp Server Support Ip igmp static-group group-addressIp cgmp proxy Configuring sdr Listener Support42-35 42-36 Ip sdr listen Enable sdr listener supportEnabling sdr Listener Support Limiting How Long an sdr Cache Entry Exists42-37 Configuring an IP Multicast Boundary42-38 Configuring Basic Dvmrp Interoperability Features42-39 Configuring Dvmrp Interoperability42-40 Ip dvmrp metric metric list42-41 Configuring a Dvmrp TunnelIp dvmrp accept-filter Access-list-number distanceNeighbor-list access-list-number Advertising Network 0.0.0.0 to Dvmrp NeighborsOriginate only Configuring Advanced Dvmrp Interoperability FeaturesIp dvmrp default-information Responding to mrinfo Requests42-44 Enabling Dvmrp Unicast Routing42-45 Rejecting a Dvmrp Nonpruning Neighbor42-46 Enter interface configuration modeChanging the Dvmrp Route Threshold By default, 7000 routes are advertised. The range is 0 toControlling Route Exchanges Limiting the Number of Dvmrp Routes Advertised42-48 Configuring a Dvmrp Summary AddressDefault is 10,000 routes. The range is 1 to Route-count42-49 No ip dvmrp auto-summary Disabling Dvmrp AutosummarizationIp dvmrp summary-address address Mask metric value42-51 Adding a Metric Offset to the Dvmrp RouteIp dvmrp metric-offset in out Increment42-52 Monitoring and Maintaining IP Multicast RoutingClearing Caches, Tables, and Databases Displaying System and Network Statistics42-53 Monitoring IP Multicast Routing42-54 Understanding Msdp Configuring Msdp43-1 43-2 Msdp Operation43-3 Msdp Benefits43-4 Configuring MsdpDefault Msdp Configuration Configuring a Default Msdp PeerPrefix-list list Ip msdp default-peer ip-address name43-5 Ip msdp description peer-name Caching Source-Active StateIp prefix-list name description string Seq number permit deny network43-7 Ip msdp cache-sa-state list43-8 Switchconfig# ip msdp sa-requestRequesting Source Information from an Msdp Peer Ip msdp sa-request ip-address name43-9 Controlling Source Information that Your Switch OriginatesRedistributing Sources Ip msdp redistribute list43-10 43-11 Name list access-list-numberFiltering Source-Active Request Messages Ip msdp filter-sa-request ip-addressRoute-map map-tag Controlling Source Information that Your Switch ForwardsUsing a Filter Ip msdp sa-filter out ip-address name43-13 Ttl Controlling Source Information that Your Switch ReceivesUsing TTL to Limit the Multicast Data Sent in SA Messages Ip msdp ttl-threshold ip-address nameIp msdp sa-filter in ip-address name Switchconfig# ip msdp sa-filter in switch.cisco.com43-15 43-16 Configuring an Msdp Mesh GroupShutting Down an Msdp Peer Ip msdp mesh-group name ip-address43-17 Including a Bordering PIM Dense-Mode Region in MsdpIp msdp shutdown peer-name peer Ip msdp border sa-address interface-id43-18 Configuring an Originating Address other than the RP AddressClear ip msdp sa-cache group-addressname Monitoring and Maintaining MsdpClear ip msdp peer peer-addressname Clear ip msdp statistics peer-addressname43-20 44-1 Configuring Fallback BridgingUnderstanding Fallback Bridging Fallback Bridging Overview44-2 Fallback Bridging and Switch Stacks Configuring Fallback Bridging44-3 44-4 Default Fallback Bridging ConfigurationFallback Bridging Configuration Guidelines Creating a Bridge Group44-5 Bridge bridge-group protocolVlan-bridge Bridge-group bridge-groupSwitchconfig# bridge 10 protocol vlan-bridge Adjusting Spanning-Tree Parameters44-6 Bridge-group bridge-grouppriority Changing the VLAN-Bridge Spanning-Tree PriorityChanging the Interface Priority Bridge bridge-group priority number44-8 Assigning a Path CostBridge-group bridge-group path-cost Cost44-9 Adjusting Bpdu IntervalsSwitchconfig# bridge 10 hello-time Bridge bridge-group hello-time secondsBridge bridge-group max-age seconds Switchconfig# bridge 10 forward-timeSwitchconfig# bridge 10 max-age Bridge bridge-group forward-timeShow bridge bridge-group group Monitoring and Maintaining Fallback BridgingDisabling the Spanning Tree on an Interface Clear bridge bridge-group44-12 45-1 Troubleshooting45-2 Recovering from a Software FailureSwitch copy xmodem flashimagefilename.bin Recovering from a Lost or Forgotten PasswordSwitch flashinit Switch loadhelper45-4 45-5 Procedure with Password Recovery Enabled45-6 Copy the configuration file into memorySwitch dir flash Procedure with Password Recovery Disabled45-7 45-8 Preventing Switch Stack Problems45-9 Recovering from a Command Switch FailureSwitchconfig# no cluster commander-address Replacing a Failed Command Switch with a Cluster Member45-10 45-11 Replacing a Failed Command Switch with Another Switch45-12 45-13 Recovering from Lost Cluster Member ConnectivityTroubleshooting Power over Ethernet Switch Ports Preventing Autonegotiation MismatchesSFP Module Security and Identification Disabled Port Caused by Power LossDisabled Port Caused by False Link Up Show controllers power inline privileged Exec commandUnderstanding Ping Monitoring TemperatureUsing Ping Monitoring SFP Module Status45-16 Switch# pingExecuting Ping Character Description45-17 Using Layer 2 TracerouteUnderstanding Layer 2 Traceroute Usage Guidelines45-18 Using IP TracerouteDisplaying the Physical Path Understanding IP TracerouteTrace the path that packets take through the network Switch# traceroute ipExecuting IP Traceroute Traceroute ip hostUnderstanding TDR Using TDR45-20 45-21 Using Debug CommandsEnabling Debugging on a Specific Feature Running TDR and Displaying the ResultsRedirecting Debug and Error Message Output Enabling All-System Diagnostics45-22 45-23 Using the show platform forward CommandUdp 10 45-24 Basic crashinfo Files Using the crashinfo Files45-25 45-26 Using On-Board Failure LoggingExtended crashinfo Files Understanding Obfl45-27 Configuring ObflShow logging onboard module Displaying Obfl Information45-28 Understanding Online Diagnostics Configuring Online Diagnostics46-1 Non-disruptive daily hhmm Configuring Online DiagnosticsScheduling Online Diagnostics Diagnostic schedule switchDiagnostic monitor syslog Configuring Health-Monitoring DiagnosticsDiagnostic monitor interval switch Diagnostic content command outputSchedule status switch Diagnostic monitor threshold switchDiagnostic monitor switch number test Show diagnostic content post resultAll basic non-disruptive Running Online Diagnostic TestsStarting Online Diagnostic Tests Diagnostic start switch number46-6 Displaying Online Diagnostic Tests and Test ResultsMIB List Supported MIBsCISCO-FTP-CLIENT-MIB CISCO-HSRP-MIB IGMP-MIB INET-ADDRESS-MIB IPMROUTE-MIB CISCO-IGMP-FILTER-MIBCISCO-RTTMON-MIB CISCO-SMI-MIB ETHERLIKE-MIB IEEE8021-PAE-MIB IEEE8023-LAG-MIBTCP-MIB UDP-MIB Using FTP to Access the MIB Files Working with the Flash File System Displaying Available File Systems Switch# show file systemsField Value Setting the Default File SystemPwd Cd newconfigsDisplaying Information about Files on a File System Changing Directories and Displaying the Working DirectoryCreating and Removing Directories Mkdir oldconfigsCopying Files Deleting Files Switch# delete myconfigCreating, Displaying, and Extracting Files Flash Archive /create destination-urlArchive /table source-url More /ascii /binary /ebcdic Archive /xtract source-urlExtract a file into a directory on the flash file system Directories are extractedWorking with Configuration Files Configuration File Types and Location Guidelines for Creating and Using Configuration FilesCopying Configuration Files By Using Tftp Creating a Configuration File By Using a Text EditorUploading the Configuration File By Using Tftp Downloading the Configuration File By Using TftpCopying Configuration Files By Using FTP Ip ftp password password Downloading a Configuration File By Using FTPIp ftp username username Filename nvramstartup-config Uploading a Configuration File By Using FTPFtp // username password @ location /directory Filename systemrunning-configFtp // username password @ location /directory Filename Copying Configuration Files By Using RCPCopy systemrunning-config Copy nvramstartup-configHostname Switch1 Ip rcmd remote-username User0 Ip rcmd remote-username username Downloading a Configuration File By Using RCPSystemrunning-config Nvramstartup-configUploading a Configuration File By Using RCP Clearing Configuration InformationSwitch# copy nvramstartup-config rcp Deleting a Stored Configuration File Clearing the Startup Configuration FileWorking with Software Images File Format of Images on a Server or Cisco.com Image Location on the SwitchField Description Copying Image Files By Using TftpDownloading an Image File By Using Tftp Preparing to Download or Upload an Image File By Using TftpArchive download-sw /directory Allow-feature-upgrade /directoryArchive download-sw Overwrite /reloadArchive upload-sw Uploading an Image File By Using TftpTftp //location /directory /image-name .tar Preparing to Download or Upload an Image File By Using FTP Copying Image Files By Using FTPDownloading an Image File By Using FTP Directory /image-name2 .tar image-name3 .tar Archive download-sw /allow-feature-upgradeDirectory /overwrite /reload For /directory /image-name1 .tarUploading an Image File By Using FTP Copying Image Files By Using RCP Preparing to Download or Upload an Image File By Using RCP File By Using RCP section on page B-31 Downloading an Image File By Using RCPOr Upload an Image File By Using RCP section on Uploading an Image File By Using RCP Rcp // username @ location /directory /image-na Copying an Image File from One Stack Member to AnotherMe.tar For /destination-system destination-stack-member-number Archive copy-sw /destination-systemDestination-stack-member-number /force-reload Source-stack-member-numberUnsupported Global Configuration Commands Unsupported Commands Cisco IOS Release 12.237SEAccess Control Lists Unsupported Privileged Exec CommandsDebug Commands Archive CommandsARP Commands Boot Loader CommandsBridge bridge-group domain domain-name bridge irb Fallback BridgingBridge bridge-groupacquire Bridge crbX25 map bridge x.121-address broadcast options-keywords HsrpInterface Commands Igmp Snooping CommandsIP Multicast Routing Ip multicast-routing vrf vrf-name Ip pim accept-rpaddress auto-rpgroup-access-list-numberShow ip pim vc group-address name type number Show ip rtp header-compression type number detailIP Unicast Routing Unsupported Privileged Exec or User Exec CommandsUnsupported VPN Configuration Commands Unsupported BGP Router Configuration CommandsUnsupported Route Map Commands Set tag tag-value MAC Address CommandsShow cable-diagnostics prbs Test cable-diagnostics prbs MiscellaneousMsdp NetFlow CommandsQoS Network Address Translation NAT CommandsUnsupported Global Configuration Command Unsupported Policy-Map Configuration CommandSpanning Tree Unsupported Interface Configuration CommandUnsupported User Exec Commands Unsupported Privileged Exec CommandIN-1 NumericsIN-2 ACLsTACACS+ CDP Lldp RIPEigrp HsrpCidr BGPIN-4 IN-5 BpduCLI CDPCEF CgmpIN-7 CNSIN-8 DNS DhcpIN-9 Wccp SnmpTACACS+ Udld VmpsIN-11 Dhcp optionIN-12 DTPIN-13 DvmrpIN-14 Dynamic ARP inspectionIN-15 LacpFIB STPIN-16 FTP Mstp STPIN-17 Icmp HttpsIN-18 IN-19 IgmpIN-20 IN-21 IP addressesIN-22 MboneIN-23 IGPIN-24 IP unicast routingIN-25 ISLIN-26 LLDP-MEDIN-27 Mhsrp MDAIN-28 IN-29 MsdpIN-30 CSTIST MTUIN-31 NACIN-32 NSSA, OspfPBR ObflIN-33 IN-34 PIMIN-35 Port-based authenticationVvid PvidIN-36 IN-37 Private VLANsIN-38 QoSIN-39 IN-40 RCPIN-41 Radius TACACS+RFC RmonIN-42 RPSRspan RstpIN-43 SDMIN-44 SnmpSRR SpanIN-45 VTP SSLIN-46 IN-47 Stacks, switchIN-48 LLDP-MED OspfIN-49 STPIN-50 IN-51 System message loggingIN-52 IN-53 IN-54 IN-55 VLANsVQP VPNIN-56 IN-57 WTDIN-58