Understanding BFD, Configuring BFD, 19-1

C H A P T E R 19

Configuring Bidirectional Forwarding Detection

Bidirectional Forwarding Detection (BFD) provides a low-overhead, short-duration method of detecting failures in the forwarding path between two adjacent routers, including the interfaces, data links, and forwarding planes. BFD is a detection protocol that you enable at the interface and routing protocol levels.

•Understanding BFD, page 19-1

•Configuring BFD, page 19-1

•Configuration Examples for BFD, page 19-7

Understanding BFD

Cisco supports the BFD asynchronous mode, in which two routers exchange BFD control packets to activate and maintain BFD neighbor sessions. To create a BFD session, you must configure BFD on both systems (or BFD peers). After you enable BFD on the interface and the router level for the appropriate routing protocols, a BFD session is created, BFD timers are negotiated, and the BFD peers begin to send BFD control packets to each other at the negotiated interval.

Configuring BFD

This section contains the following topics:

•BFD Configuration Guidelines and Restrictions, page 19-2

•Configuring BFD for OSPF, page 19-2

•Configuring BFD for BGP, page 19-4

•Configuring BFD for IS-IS, page 19-4

•Configuring BFD for Static Routes, page 19-6

For more information about BFD, refer to the IP Routing: BFD Configuration Guide, Cisco IOS Release 15.1S.

	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide

OL-23826-09		19-1
OL-23826-09		19-1

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Cisco Systems A9014CFD manual Understanding BFD, Configuring BFD, 19-1

Contents

Text Part Number OL-23826-09 Americas Headquarters Copyright 2011-2013, Cisco Systems, Inc Iii N T E N T S Related Documents Standards MIBs Standards MIBs Searching and Filtering Output of show and more Commands Vii Split-Horizon8-6 Viii Restrictions Manually Configuring an IP SLA CFM Probe or Jitter Operation Restrictions Overview Xii Setting up Manual Preemption for Vlan Load Balancing Xiii Configuring Mpls VPNs 19-6 Xiv Verifying Local Switching Xvi Verifying the Synchronous Ethernet configuration Xvii Cisco IOS IP SLA Xviii Marking Xix Technical Assistance Xxi Configuring Hsrp Xxii Configuring Link Layer Discovery Protocol Xxiii How to Configure Bert 32-2 Xxiv Xxv Configuring IPv6 Duplicate Address Detection Troubleshooting Tips Xxvii BFD Xxviii Verifying Layer 2 Tunneling Xxix Configuring Unspecified Bit Rate Xxx Creating IPv6 VRFs on PE Routers Xxxi Technical Assistance Xxxii Finding Feature Information Xxxiii Igmp Xxxiv IPv6 Multicast Groups Xxxv Span Traffic Xxxvi Document Number Date Change Summary About This GuideDocument Revision History Xxxviii Xxxix OL-23826-09 Xli Xlii Xliii Xliv Xlv Xlvi Xlvii ObjectivesAudience Organization Xlviii Mpls OAM Xlix SLA Boldface font ConventionsChapter Description Convention Description Release Notes To access the related documentation on Cisco.com, go toRelated Documentation Lii Cisco ASR 901 Router Overview This section contains the following topics FeaturesPerformance Features Introduction Management Options Manageability Features Quality of Service and Class of Service Features Security Features Monitoring Features Layer 3 FeaturesLayer 3 VPN Services OL-23826-09 Licensing Finding Feature InformationContents License Sl.No Chassis PID License PID Description Feature OverviewLicenses Supported on Cisco ASR 901 Router Following licenses are supported Licensing Licenses Supported on Cisco ASR 901 Router License Types Feature Based LicenseFeatures Supported License Features Port Number Port Type Chassis PID License Required Port or Interface BehaviorPort Based/Mode License 1588BC License Router# show ip interface brief Example When Port Based License is not InstalledExample When Port Based License is Installed Port Based License Router# show interface Ten0/1 10gigUpgrade LicenseExample When 10gigUpgrade License is not Installed Routerconfig# interface gig 0/0 Flexi License Example When 10gigUpgrade License is InstalledExample When Flexi License is not Installed Following is a sample output from the show license command Following example shows how to install the 1588BC license Example When Flexi License is InstalledExample When 1588BC License is not Installed Example When 1588BC License is Installed Router# license clear 1588BC Use the license clear command to remove the 1588BC licenseRouterconfig-ptp-clk#no ptp clock boundary domain Removing the 1588BC License Generating the License Installing the LicenseEnable License install Copy tftp flash Show flash License install license-file-name Example Command PurposeChanging the License Router# copy tftp flash Return Materials Authorization License ProcessRouter# license install ? Example RMA Process To verify the new license, use the show license command Where to Go Next Standard StandardsMIBs RFCs Description Link Technical Assistance Feature Name Releases Feature Information Feature Information for Licensing OL-23826-09 Before Starting Your Router First-Time ConfigurationSetup Mode Configuring Global Parameters Using Setup Mode Enter a hostname for the router this example uses Completing the Configuration Verifying the Cisco IOS Software Version Configuring the Hostname and PasswordPassword prompt appears. Enter your password Router# show config Verifying the Hostname and PasswordExit back to global configuration mode Router# configure terminal Managing and Monitoring Network Management Features This section contains the following procedures Network Management Features for the ASR Enters global configuration mode Configuring Snmp SupportEnables privileged Exec mode Enter your password if prompted View view-name-Optional Previously defined view. The view Form of this command removes the specified community stringString-Community string is the password to access the Snmp Protocol Temperature CommandNotification-type -snmp authentication -Enables RFC Envmon voltage shutdown supply fan temperature -When Snmp-server host command Command Purpose Interface loopback number Configuring Remote Network ManagementExits global configuration mode Enable Configure terminal Command or Action Purpose Zero-Touch Deployment Zero-touch Deployment Image Download Ip dhcp Configuring a Dhcp ServerNetwork ip-address subnet-mask Specifies to exclude IP address of the Dhcp server Creating a Bootstrap Configuration Configuring a Tftp Server Enabling a Tftp Server on the Edge Router Configuring the Cisco Configuration Engine Example Configuring a Dhcp Server Configuration ExamplesExample Configuring Snmp Support Example Configuring Remote Network Management Related Topic Document Title Additional ReferencesExample Zero-touch Deployment Related Documents MIBs Network Management Features for the ASR Understanding Command Modes Using the Command-Line Interface Use the interface Entered. Use a passwordUser Exec Log Exit, or logout Help Understanding the Help SystemLine console Ctrl-Z or enter end Router# show conf Understanding Abbreviated CommandsUnderstanding no and default Forms of Commands Understanding CLI Error Messages Range is from 0 to Using Command HistoryChanging the Command History Buffer Size Error Message Meaning How to Get Help Enabling and Disabling Editing Features Using Editing FeaturesRecalling Commands Disabling the Command History Feature Backspace key Editing Commands through KeystrokesCapability Keystroke1 Purpose Press Ctrl-Y Press Ctrl-L or Ctrl-R Editing Command Lines that WrapPress Ctrl-V or Esc Q Return and Space bar Router# show interfaces include protocol Accessing the CLICommand begin include exclude regular-expression Saving Configuration Changes Upgrading the Cisco IOS image Software UpgradeSelecting a Cisco IOS Image Router# show file system Copy the IOS Image from the Tftp serverIf the right steps are not followed properly Router# verify flashasr901-universalk9-mz.151-2.SNG Save the configuration and reload the routerVerify the Cisco IOS upgrade Verify the Cisco IOS image in the file system Router# show version Auto Upgrading the MCU Manually Upgrading the Rommon Router# upgrade rom-monitor internal Auto Upgrade of RommonRommon AUTOUPGRADEROMMON=TRUE False Enters enable mode Configuring Gigabit Ethernet InterfacesConfiguring the Interface To configure the GE interface, complete the following steps Gigabitethernet 0/1 Setting the Speed and Duplex ModeCdp enable Mtu bytes Enabling the InterfaceModifying MTU Size on the Interface Verifying the MTU Size No mtu or default mtu command Restrictions and Limitations Configuring MAC FLap ControlComplete the following steps to configure MAC Flap control MAC Flap Control Time-interval Configuring a Combo PortRestrictions Mac-flap-ctrl on per-mac mac-movement Physical connection Configures the media typeExits interface configuration mode and enters Auto-select-Specifies dynamic selection Router# show interface gigabitethernet 0/7 Verifying the Media TypeRouter# show interface gigabitethernet 0/1 Configuring Ethernet Virtual Connections Supported EVC Features Ethernet Virtual Connections Understanding EVC FeaturesService Instances and EFPs Encapsulation To the appropriate EFP Configures default encapsulationBridge Domains Rewrite Operations Dhcp Client on Switch Virtual InterfaceSplit-Horizon Configuration Guidelines Configuring EFPsDefault EVC Configuration Creating Service Instances Copy running-config startup-config Service instance number ethernet nameDefault Show ethernet service instance Example Bridge Domains and Vlan Encapsulation Configuration Examples of Supported FeaturesExample Configuring a Service Instance Example Encapsulation Using a Vlan Range Example Split Horizon Router config-if-srv#rewrite ingress tag pop 1 symmetricRouter config-if-srv#rewrite ingress pop 1 symmetric Example Rewrite Example Overlapping Encapsulation Configuration Examples of Unsupported FeaturesExample Filtering Interface type number How to Configure EVC Default EncapsulationConfiguring EVC Default Encapsulation with Bridge-Domain An identifier Configuring EVC Default Encapsulation with XconnectConfigures the default service instance Verifying EVC Default Encapsulation with Bridge-Domain Example Configuring EVC Default Encapsulation with Xconnect Configuring Other Features on EFPsVerifying EVC Default Encapsulation with Xconnect Configuration Examples for EVC Default Encapsulation MAC Address Forwarding, Learning and Aging on EFPs EFPs and EtherChannels Interface type slot/port No mac-address-table learning vlan vlan-id Router# show mac-address-table End Return to privileged Exec modeRouterconfig# no mac-address-table learning vlan Addresses learned on a particular VLAN/BD Router# show mac-address-table interface port-channel Configuring Ieee 802.1Q Tunneling using EFPs802.1Q Tunneling QinQ Router# show mac-address-table interface 0/9 1shows the tag structures of the double-tagged packets You can use EFPs to configure 802.1Q tunneling in two ways Configuration Examples Routed QinQ Configuration ExampleCisco ASR 901 router supports pop 2 configuration Bridge Domain Routing Example Configuring Bridge-Domain Routing Interface type-number How to Configure Dhcp Client on SVIConfiguring Dhcp Client on SVI Configures the Vlan interface and enters interface Verifying Dhcp Client on SVI Configuration Example for Dhcp Client on SVI EFPs and Mstp EFPs and Switchport MAC Addresses Monitoring EVC Command Description Sample Configuration with Switchport to EVC Mapping Configuration Example Line vty 0 4 login Additional References Supported EVC Features OL-23826-09 Understanding How EtherChannels Work Configuring EtherChannelsEtherChannel Feature Overview Understanding Ieee 802.3ad Lacp EtherChannel Configuration Understanding How EtherChannels Are ConfiguredEtherChannel Configuration Overview Understanding Manual EtherChannel Configuration Router a Router B Result Passive modePassive mode Active mode Active mode Passive mode Understanding Load Balancing EtherChannel Configuration Guidelines and RestrictionsUnderstanding Port-Channel Interfaces Configuring Channel Groups Configuring Etherchannels Configuration examples for Lacp system priority Configuring the Lacp System Priority and System ID Lacp rate fast normal End Configuring the Lacp Transmit Rate Verifying the Lacp Transmit Rate Configuring EtherChannel Load BalancingConfiguration Examples Verifying the MTU Size on Port-Channel Enable Configure terminal Interface port-channel numberModifying MTU Size on Port-Channel Restrictions for EVC EtherChannel EVC On Port-Channel Router# show ethernet service instance interface Configuring EVC on Port-ChannelVerifying the Configuration Router# show ethernet service evc id evc-idinterface Problem Solution Troubleshooting Contents Configuring Ethernet OAM 10-2 Configuring Ethernet CFMUnderstanding Ethernet CFM IP SLA Support for CFM Configure terminal Enter global configuration mode Default Ethernet CFM ConfigurationEthernet CFM Configuration Restrictions and Guidelines Configuring the CFM Domain 10-4 Optional Configure the maximum number of MEPs Second, 10 seconds, 1 minute and 10 minutes. The defaultWe do not recommend configuring a large number Is 2 to 255 the default is 10-6 Example for Basic CFM configuration 10-7 Configuring Multi-UNI CFM MEPs in the Same VPNRestrictions Exit 10-8 Cfm mep domain domain-name mpid identifier 10-9 Alias alias-short-ma-name icc icc-code meg-idNumber ma-number vlan-id vlan-id vpn-id vpn-id 10-10 10-11 10-12 Configuring Ethernet CFM Crosscheck 10-13 Configuring Static Remote MEPContinuity-check static rmep Static 10-14 Configuring a Port MEPService ma-name ma-number vpn-id port 10-15 Configuring Snmp Traps 10-16 Configuring IP SLA CFM OperationEthernet echo mpid identifier domain domain-name Ethernet jitter mpid identifier domain domain-name Seconds. The default is 0 seconds Repeats. The range is from 1 to 604800 seconds the defaultAllowed by the protocol being used the default is 66 bytes Seconds to keep the operation in memory when it is not 10-18 10-19 Configuring CFM over EFP with Cross ConnectShow the configured IP SLA operation 10-20 Configuring CFM over EFP Interface with Cross Connect 10-21 Example for untagged Encapsulation 10-22 Example for single tag Encapsulation 10-23 10-24 Configuring CFM with EVC Default EncapsulationCfm mep domain domain-name mpid mpid-value 10-25 Verifying CFM with EVC Default Encapsulation 10-26 Configuring Y.1731 Fault ManagementExample Configuring CFM with EVC Default Encapsulation Default Y.1731 Configuration 10-27 Configuring ETH-AIS Ethernet cfm lck link-status global Configuring ETH-LCKShow ethernet cfm error Show ethernet cfm smep interface interface-id 10-29 Managing and Displaying Ethernet CFM Information 10-31 10-32 Understanding the Ethernet OAM Protocol 10-33 OAM FeaturesFollowing OAM features are defined by Ieee 802.3ah Benefits of Ethernet OAM 10-34 Link Monitoring 10-35 Setting Up and Configuring Ethernet OAMThis section includes the following topics Ethernet oam Default Ethernet OAM ConfigurationRestrictions and Guidelines Enabling Ethernet OAM on an Interface 10-37 Ms mode active passive timeout secondsEthernet oam max-rate oampdus min-rate seconds Show ethernet oam status interface interface-id 10-38 Configuring Ethernet OAM Link MonitoringEnabling Ethernet OAM Remote Loopback 10-39 10-40 Ethernet oam link-monitor frame-periodThreshold high high-frames none low Ethernet oam link-monitor frame-seconds 10-41 Configuring Ethernet OAM Remote Failure IndicationsEthernet oam link-monitor receive-crc threshold No ethernet link-monitor on Ethernet oam remote-failure critical-event Configuring Ethernet OAM TemplatesDying-gasp link-fault action Error-disable-interface 10-43 Source-template template-name Threshold high high-seconds none lowLow-seconds window milliseconds Ethernet oam link-monitor high threshold action Show ethernet oam summary Displaying Ethernet OAM Protocol InformationShow ethernet oam discovery interface interface-id Show ethernet oam statistics interface interface-id Verifying OAM Discovery Status Verifying Ethernet OAM ConfigurationVerifying Information Oampdu and Fault Statistics Verifying an OAM Session 10-47 Verifying Link Monitoring Configuration and Status Active Understanding E-LMIVerifying Status of the Remote OAM Client 10-48 10-49 Configuring E-LMIDefault E-LMI Configuration Restrictions 10-50 Enabling E-LMI 10-51 Configuring Ethernet LoopbackUnderstanding Ethernet Loopback Displaying E-LMI Information 10-52 Enabling Ethernet Loopback 10-53 10-54 10-55 10-56 Configuring Y.1564 to Generate Ethernet Traffic 10-57 Internal Mode 10-58 Configuring IP SLA for Traffic GenerationRouterconfig# ip sla Specify the SLA ID to start the IP SLA session 10-59 Measurement-type direction -Specifies the statistics 10-60 10-61 Example Two-Way Measurement 10-62 11-1 ITU-T Y.1731 Performance MonitoringPrerequisites for ITU-T Y.1731 Performance Monitoring 11-2 Restrictions for ITU-T Y.1731 Performance MonitoringInformation About ITU-T Y.1731 Performance Monitoring 11-3 Frame Delay and Frame-Delay VariationTwo-way Delay Measurement 11-4 Frame Loss RatioOn-Demand and Concurrent Operations Single-ended ETH-SLM 11-5 How to Configure ITU-T Y.1731 Performance MonitoringBenefits of ITU-T Y.1731 Performance Monitoring Supported interfaces 11-6 Configuring Two-Way Delay MeasurementMax-delaymilliseconds Owner owner-id 11-7 Mac-address target-address -SpecifiesMac-address source-address -Specifies 11-8 Boundary ,...,boundary -Lists upper 11-9 Configuring Single-Ended Synthetic Loss MeasurementEnable Configure terminal Asr901-platf-multi-nni-cfm 11-10 11-11 Mac-addresstarget-address-SpecifiesMac-addresssource-address-Specifies Owner-id-Specified the name of the Snmp Exits IP SLA Y.1731 loss configuration modeEnters IP SLA configuration mode Exits IP SLA configuration mode and enters global Threshold-type consecutive Threshold-type averageNumber-of-measurements -Optional When Number-of-measurements argument. The range is Threshold-value upper-threshold Threshold-type immediate -Optional When aScheduling IP SLAs Operations Prerequisites Multi-operation scheduler Individual IP SLAs operationSpecifies an IP SLAs operation group number Range of operation numbers to be scheduled for a Router-1#show running interface gigabitethernet0/0 Router# show ip sla configuration11-16 Router# show ethernet cfm pm session detail Example Verifying Ethernet CFM Performance Monitoring11-17 Router# show ethernet cfm pm session summary Router# show ip sla history interval-statistics Example Verifying History for IP SLAs Operations11-18 11-19 Configuring Direct On-Demand Operation on a Sender MEP 11-20 Configuring Referenced On-Demand Operation on a Sender MEP 11-21 Example On-Demand Operation in Direct Mode Router# ip sla on-demand ethernet slm 2002 duration Example On-Demand Operation in Referenced Mode11-22 11-23 Releases, and feature sets, use Cisco MIB Locator found atIeee 802.1ag ITU-T Y.1731 MEF Following URL 11-24 11-25 Feature Name Releases Feature Information 11-26 12-1 Configuring Resilient Ethernet ProtocolUnderstanding Resilient Ethernet Protocol REP Overview REP Open Segments 12-2 No-neighbor Topology 12-3 12-4 Link IntegrityFast Convergence Vlan Load Balancing VLB Neighbor Offset Numbers in a Segment 12-5 12-6 REP Ports 12-7 Configuring Resilient Ethernet Protocol REPDefault REP Configuration REP Configuration Guidelines 12-8 12-9 Configuring the REP Administrative Vlan 12-10 Configuring REP Interfaces Port-channel range is 1 to Routerconfig# interface Gigabitethernet0/1Service instance instance-id Enter the physical Layer 2 interface or port channel ID. 12-12 12-13 12-14 Verifies the REP interface configurationFile 12-15 Configuring REP as Dual Edge No-Neighbor Port 12-16 12-17 Rep segment segment-id edge no-neighborPrimary preferred 12-18 Cisco ASR 901 Dual Rep Edge No-Neighbor Topology Example76001 12-19 76002 12-20 Setting up Manual Preemption for Vlan Load Balancing 12-21 Configuring Snmp Traps for REP 12-22 Trap-rate commandMonitoring REP 12-23 This section contains the following examples Configuration Examples for REPConfiguring the REP Administrative Vlan Example Configuring a REP Interface Example 12-25 Setting up the Preemption for Vlan Load Balancing ExampleConfiguring Snmp Traps for REP Example Monitoring the REP Configuration Example 12-26 Cisco ASR 901 Topology Example 12-27 ASR2 12-28 12-29 12-30 13-1 Configuring MST on EVC Bridge DomainOverview of MST and STP 13-2 Overview of MST on EVC Bridge DomainRestrictions and Guidelines MST0 13-3 13-4 Configuring MST on EVC Bridge Domain 13-5 Specifies the gigabit ethernet interface to configureSlot/port-Specifies the location of the interface 13-6 Configuration Example for MST on EVC Bridge DomainVerification Router# show spanning-tree vlan 13-7 Router# show spanning-tree mst This example shows MST on port channels13-8 13-9 Troubleshooting Tips 13-10 14-1 Configuring Multiprotocol Label Switching 14-2 15-1 Configuring EoMPLSUnderstanding EoMPLS 15-2 Configuring EoMPLS 15-3 EoMPLS Configuration Example Configures encapsulation type for the service instance Configuring Pseudowire RedundancyConfiguration Commands Specifies an interface to configure 15-5 Configure terminal Enters global configuration mode ExamplePort Based EoMPLS Show mpls l2t vc id 15-6 Routerconfig# xconnect Encapsulation mpls 16-1 Configuring Mpls VPNsUnderstanding Mpls VPNs 16-2 Configuring Mpls VPNsConfiguration Examples for Mpls VPN PE1 Configuration 16-3 Configuring Mpls VPNs Configuration Examples for Mpls VPN 16-4 16-5 Provider Configuration 16-6 PE2 ConfigurationInterface details 16-7 Ospf and BGP details 16-8 Loop Back details 16-9 16-10 17-1 Configuring Mpls OAMUnderstanding Mpls OAM LSP Ping 17-2 Configuring Mpls OAMLSP Ping over Pseudowire LSP Traceroute Ping mpls ipv4 Using LSP Ping for LDP IPv4 FECUsing LSP Traceroute for LDP IPv4 FEC Using LSP Ping for Pseudowire Vc-id-value Using LSP Traceroute over PseudowireDisplaying AToM Vccv capabilities Show mpls l2transport binding vcid 18-1 Configuring Routing ProtocolsChanging Default Hashing Algorithm for Ecmp Asr901-ecmp-hash-config global-type 18-2 19-1 Configuring BFDUnderstanding BFD Enables BFD for Ospf on the interface BFD Configuration Guidelines and RestrictionsConfiguring BFD for Ospf Configuring BFD for Ospf on One of More Interfaces Process Configuring BFD for Ospf on All InterfacesCreates a configuration for an Ospf process Specifies the BFD session parameters 19-4 Configuring BFD for BGPConfiguring BFD for IS-IS Configuring BFD for IS-IS on a Single Interface 19-5 Configuring BFD for IS-IS for All Interfaces 19-6 Configuring BFD for Static Routes 19-7 Configuration Examples for BFDBFD with Ospf on All Interfaces BFD with Ospf on Individual Interfaces 19-8 BFD with BGPBFD with IS-IS on All Interfaces BFD with IS-IS on Individual Interfaces 19-9 BFD with Static Routes 19-10 20-1 Configuring T1/E1 ControllersConfiguring the Card Type 20-2 Configuring E1 ControllersSubslot 20-3 Channel-group channel-no timeslots timeslot-list 64 command 20-4 Configuring T1 Controllers 20-5 Troubleshooting ControllersTroubleshooting E1 Controllers Incoming traffic Troubleshooting T1 ControllersPayload loopback mode of the framer. The framer re-clocks Receiver Local line Path to the receiver path20-7 20-8 21-1 Configuring Pseudowire 21-2 Understanding PseudowiresStructure-Agnostic TDM over Packet 21-3 Hot Standby Pseudowire Support for ATM/IMATransportation of Service Using Ethernet over Mpls Limitations Cem group-number Configuring PseudowireConfiguring Pseudowire Classes Xconnect ip pw-class pseudowire-class 21-5 Xconnect ip-addressencapsulation mpls Configuring CEM ClassesClass cem cem-class-name Cem group-number Cem class cem-class-name 21-7 Xconnect peer-loopback-ip-addressencapsulation mpls Configuring a Backup PeerEnable Configure terminal Interface cemslot/port Specifies the CEM class name 21-9 Configuring Structure-Agnostic TDM over PacketXconnect ip-addressencapsulation mpls Exit 21-10 30.30.30.2 255.255.255.255 Udp port local-udp-port remote remote-udp-port Configuring a SAToP Pseudowire with UDP EncapsulationPseudowire-classpseudowire-class-name Xconnect peer-router-id vcid pseudowire-class name 21-12 Exits the CEM interface Values for SAToP pseudowires using UDP are fromExits the configuration mode Remote peer Xconnect ip-addressencapsulation mpls Exit End Enable Configure terminal Controller e1 t1 slot/portCem-groupgroup-number timeslots timeslot Exit Interface CEMslot/port Recommend that you build a route from the xconnect address Configuring a CESoPSN Pseudowire with UDP EncapsulationExits configuration mode Defines a CEM channel 21-16 Exits pseudowire-class configuration modeUdp port local localudpport remote remoteudpport 21-17 21-18 QoS for CESoPSN over UDP and SAToP over UDP Xconnect ip-addressencapsulation Service instance instance-numberAlthough the symmetric keyword appears to be optional, you 21-19 21-20 Configuring L2VPN Pseudowire RedundancySelects an E1 or T1 controller Creates a CEM interface and assigns it a CEM group number 21-21 Interface interface-name Configuring ATM/IMA Pseudowire Redundancy in PVC ModeExample Pseudowire Redundancy Backup peer peer-router-ip-addr vcid 21-23 Multiplex on the permanent virtual path Configuring ATM/IMA Pseudowire Redundancy in PVP ModeOr more virtual circuits VCs Vpi-ATM network virtual path identifier VPI of the VC to 21-25 Configuring ATM/IMA Pseudowire Redundancy in Port ModeTransport over Mpls AToM static pseudowire Router# show mpls l2transport vc Verifying Hot Standby Pseudowire Support for ATM/IMAPeer-router-ip-addr-IP address of the remote peer router 21-26 21-27 TDM Local Switching 21-28 Configuring TDM Local Switching on a T1/E1 Mode 21-29 Configuration Example for Local SwitchingVerifying Local Switching 21-30 ATM/IMA 21-31 Configuration Examples for PseudowireExample TDM over Mpls Configuration-Example 21-32 21-33 Asrb 21-34 Following configuration uses CESoSPN with UDP encapsulationExample CESoPSN with UDP 21-35 Example Ethernet over Mpls 21-36 21-37 Feature Information for Configuring Pseudowire 21-38 22-1 Configuring ClockingRestrictions 22-2 Configuring Network Clock for Cisco ASR 901 Router 22-3 Configuring Network Clock in Global Configuration Mode 22-4 22-5 Example for GPS interface 22-6 Configuring Network Clock in Interface Configuration Mode Clock Selection Algorithm Understanding SSM and EsmcSynchronization Status Message Ethernet Synchronization Messaging Channel Esmc behavior for STP Blocked Ports Configuring Esmc in Global Configuration ModeQL-disabled mode Esmc behavior for Port Channels 22-9 Configuring Esmc in Interface Configuration Mode 22-10 Verifying Esmc ConfigurationShow esmc Router#show esmc interface gigabitEthernet 0/10 Managing SynchronizationShow network-clock synchronization 22-11 22-12 Synchronization Example Configures synchronous ethernet copper port as master Configuring Synchronous Ethernet for Copper PortsVerifying the Synchronous Ethernet configuration Configures synchronous ethernet copper port as slave 22-14 22-15 22-16 Troubleshooting TipsSynchronization detail RP command to confirm Shown in this example 22-17 Troubleshooting Esmc Configuration 22-18 Configuring PTP for the Cisco ASR 901 Router 22-19 Setting System Time to Current TimeConfiguring PTP Ordinary Clock Configuring Master Ordinary Clock 22-20 Priority1 priority-value Priority2 priority-value 22-21 Configuring Slave Ordinary Clock 22-22 Clock source source-address 22-23 22-24 Port Role Configuring PTP in Unicast ModeConfiguring PTP in Unicast Negotiation Mode Port Name Negotiation mode. The following options can be Configures Cisco ASR 901 router on unicastConfigured with this command PTP Boundary Clock 22-27 Configuring PTP Boundary ClockClock-port port-namemaster 22-28 22-29 Exits clock port configuration modeVerifying PTP modes Ordinary Clock Router# show ptp clock dataset time-properties domain Router# show ptp clock dataset defaultBoundary Clock 22-30 Router# show ptp clock runn dom Verifying PTP Configuration on the 1588V2 Slave22-31 Router# show ptp clock running domain Verifying PTP Configuration on the 1588V2 MasterTypical configuration on a 1588V2 master is 22-32 22-33 22-34 Configuring a Hybrid Ordinary ClockPTP Hybrid Clock Slaves Hybrid-Optional Enables the PTP boundary clockTo work in hybrid mode. Enables the hybrid clock such That the output of the clock is transmitted to the remote 22-36 22-37 Configuring a Hybrid Boundary Clock 22-38 Router# show running-config section ptpVerifying Hybrid modes Router#show platform ptp channelstatus SSM and PTP Interaction22-39 22-40 ClockClass MappingPTP Redundancy Telecom Profiles 22-41 Configuring Telecom Profile in Slave Ordinary ClockClock source source-address priority End 22-42 22-43 Configuring Telecom Profile in Master Ordinary Clock Router#show ptp port running detail Verifying Telecom profileTiming packets with a PTP slave devices 22-44 Router#show ptp clock running domain 22-45 22-46 Setting the TimePropertiesStatic Unicast Mode ASR901 Negotiation Mechanism 22-47 Configuring ToD on 1588V2 Slave 22-48 23-1 Configuring Ipsla Path DiscoveryCisco IOS IP SLA 23-2 Configuration Parameters 23-3 Example for Ipsla Path Discovery Router#show ip sla mpls-lsp-monitor neighbors This example shows the LPD parameter values configured23-4 23-5 Two-Way Active Measurement Protocol 23-6 Configuring Twamp 23-7 Configuring the Twamp ServerEnable Configure terminal Ip sla server twamp Port port-number 23-8 Configuring the Twamp ReflectorConfiguration Examples for Twamp Configures the switch as a Twamp responder, and enter Twamp Routerconfig# ip sla responder twamp Example Configuring the Router as an IP SLA Twamp serverExample Configuring the Router as an IP SLA Twamp Reflector Routerconfig# ip sla server twamp 23-10 24-1 Configuring QoS 24-2 Understanding QoS 24-3 Default QoS for Traffic from External Ethernet PortsDefault QoS for Traffic from Internal Ports 24-4 Modular QoS CLI 24-5 Input and Output PoliciesInput Policy Maps 24-6 Access Control ListsOutput Policy Maps 24-7 Classification 24-8 Match CommandClass Maps 24-9 Classification Based on Layer 2 CoSClassification Based on IP Precedence Classification Based on IP Dscp 24-10 Classification ComparisonsThis display shows the available classification options Per-hop Decimal Precedence CoS 24-11 Classification Based on QoS GroupsTraffic Type Per-hop Decimal Precedence CoS 24-12 Classification Based on Vlan IDs 24-13 Table Maps 24-14 Policing 24-15 Individual PolicingGigabitethernet port 24-16 Unconditional Priority Policing 24-17 Configuration ExampleRouterconfig# policy-map policy1 Egress Policing 24-18 Routerconfig# policy-map ExampleMarking 24-19 Congestion Management and SchedulingTraffic Shaping 24-20 Routerconfig# policy-map out-policyRouterconfig# policy-map out-policy-parent Routerconfig-pmap-c#service-policy out-policy 24-21 Class-Based Weighted Fair QueuingThis is an example of a parent-child configuration Routerconfig# policy-map parent 24-22 Routerconfig-pmap-c#bandwidth remaining percent 24-23 Priority Queuing 24-24 Routerconfig# policy-map pmapbckboneIngress and Egress QoS Functions Ingress QoS Functions 24-25 Configuring Quality of Service QoSQoS Limitations Egress QoS Functions 24-26 General QoS LimitationsStatistics Limitations Value Propagation LimitationsClassification Limitations GigabitEthernet 24-28 Marking Limitations Rate Limiting Limitations Congestion Management LimitationsPrecedence Prec-transmit Qos-group Queuing Limitations 24-30 ACL-based QoS RestrictionsPolicing with Shaping Limitations QoS for CPU Generated Traffic Improving Feature ScalabilityQoS for MPLS/IP over Mlppp Tcam with QoS 24-32 QoS Configuration Guidelines 24-33 Sample QoS Configuration 24-34 Configuring ClassificationEnter the password Creating a Class Map for Classifying Network Traffic 24-35 24-36 Attaching the Policy Map to an Interface 24-37 Attaching Policy Map to Cross Connect EVC 24-38 Configuring Marking 24-39 Creating a Class Map for Marking Network Traffic Set qos-group Traffic Attributes Network Layer ProtocolSet cos Set dscp 24-41 Configuring Mpls Exp Bit Marking using a PseudowireSpecify an EVC Specify an encapsulation type for the EVC 24-42 Configuring Congestion ManagementConfiguring Low Latency Queueing LLQ Use the policy-mapcommand to define a policy map 24-43 Configuring Multiple Priority QueueingPolicy-map interface commands to verify your configuration 24-44 24-45 Configuring Class-Based Weighted Fair Queuing CbfqUse the exit command to exit class map configuration Use the exit command to exit the policy map configuration 24-46 Weighted Random Early Detection WredAmount of bandwidth This step is optional 24-47 Configuring ShapingNo random-detect discard-class-based No random-detect discard-class value 24-48 Configuring the Secondary-Level Child Policy Map 24-49 Configuring Ethernet Trusted ModeCreating IP Extended ACLs 24-50 Using Class Maps to Define a Traffic ClassClass-map match-all match-any Class-map-name Show class-map Match cos cos-list ip dscp dscp-listIp precedence ip-precedence-list Qos-group value vlan vlan-list Class-mapclass-map-name Creating a Named Access ListMatch access-group name access-group-name Permit source source-wildcard any log 24-53 What to do Next Router# show run int gig 0/1 Router# show ip access-lists tcam1Tcam with ACL 24-54 Router# show policy-map interface gigabitethernet 0/0 Verifying Named Access ListRouter# show access-lists tes456 24-55 24-56 Configuration Example for Named Access ListRouter# show running-config Class-map match-any test 24-57 24-58 24-59 24-60 24-61 QoS Marking for CPU-Generated Traffic QoS Treatment for Performance-Monitoring ProtocolsCisco IP-SLAs QoS Treatment for IP-SLA Probes 24-63 QoS Queuing for CPU-Generated Traffic Class in the policy map Configuring Class-map for Matching Mpls EXP BitsTo enter QoS class-map configuration mode Extending QoS for Mlppp 24-65 Configuring Class-map for Matching IP Dscp ValueMatch ip dscp dscp-value...dscp-value Match ip dscp This configuration packets with IP Dscp of value af11 areDscp-value-The Dscp value used to identify a Dscp value 24-66 24-67 Configuring a Policy-map 24-68 Class class-defaultBandwidth percent bandwidth-percent Exit Exampleclass 24-69 Value in the type of service ToS byteBits defined by the policy map Dscp-value-The Dscp value used to identify a Dscp 24-70 Enable Configure terminal Interface multilink group-numberAttaching the Policy-map to Mlppp Interface Ip address address subnet mask 24-71 24-72 Re-marking IP Dscp Values of CPU Generated Traffic 24-73 Re-marking Mpls EXP Values of CPU Generated TrafficGenerated traffic Are 0 to Class-map-name-The name used for class map Configuring a Policy-map to Match on CS5 and EXP4Class and enters QoS class-map configuration mode Bandwidth percent bandwidth-percent Set ip dscp dscp-value Class-map-name-Name of the class for the class map Value in the type of service ToS byteAs a match criterion Cs-value-The Class SelectorCS value 24-76 Configuring Class-map for Matching Mpls EXP BitsExits QoS policy-map class configuration mode 24-77 Configuring Class-map for Matching IP Dscp ValueConfiguring a Policy-map Following example shows a configuration of a policy-map 24-78 Configuring a Policy-map to Match on CS5 and EXPAttaching the Policy-map to Mlppp Interface 24-79 Verifying Mpls over Mlppp Configuration 24-80 24-81 Troubleshooting Tips 24-82 24-83 Example Tcam troubleshooting related error Entries used 256/256 no free entries available Routerconfig-if-srv#service-policy input policy224-84 24-85 We now have enough free entries to configure policy2Routerconfig-if-srv#no service-policy input policy1 Entries used 195/256 after unconfiguring policy1 24-86 Entries used 220/256 after configuring policy2 24-87 Related Topic Document Title 24-88 Feature Information for Configuring QoS 25-1 Configuring Mlppp Mpls label protocol ldp Mlppp Optimization FeaturesPrerequisites Distributed Multilink Point-to-Point Protocol Offload 25-3 Multiclass MlpppMpls over Mlppp 25-4 Mpls Label imposition LER Mpls Label switching LSR 25-5 Mpls over Mlppp on Core LinksMpls over Mlppp on CE to PE Links Creating a Multilink Bundle Configuring Mlppp BackhaulConfiguring the Card Type, E1 and T1 Controllers Configuring a Multilink Backhaul Interface 25-7 Configuring MrruExample configures an IP address and subnet mask Example creates a multilink bundle 25-8 Configuring PFC and AcfcRemote apply, pfc local request, and pfc remote apply 25-9 25-10 Configuration requestsRequests. The syntax is as follows Acfc option are not accepted 25-11 Enabling Multilink and Identifying the Multilink InterfaceKeepalive period retries 25-12 Ppp multilink group group-number 25-13 Mlppp OffloadPpp multilink idle-link Ppp multilink queue depth 25-14 Configuring Mpls over the Mlppp on a Serial InterfaceConfiguring Additional Mlppp Settings Ppp multilink Ppp multilink group group-number Exit 25-15 Interface multilink group-number Configuring Mpls over Mlppp for OspfNumber, and enters the interface configuration mode 25-16 25-17 25-18 Configuration Examples for Mpls over Mlppp Router# show mpls ldp bindings 6.6.6.6 Verifying Mpls over Mlppp Configuration25-19 Router# ping mpls ipv4 6.6.6.6/32 25-20 25-21 25-22 Feature Information for Mlppp Recording Obfl Messages Onboard Failure LoggingUnderstanding Obfl Retrieval of the Obfl message 26-2 Configuring ObflVerifying Obfl Configuration Clilog summary 26-3 26-4 27-1 Preemption Text AuthenticationInformation About Hsrp and Vrrp Overview of Hsrp and Vrrp Standby group-numberauthentication text string How to Configure HsrpConfiguring Hsrp Complete the following steps to configure Hsrp 27-4 27-5 Configuration Examples for HsrpExample Configuring Hsrp Active Router Example Configuring Hsrp Backup Router Interface type number Ip ip-address mask How to Configure VrrpExample Hsrp Text Authentication Configuring Vrrp 27-7 Vrrp group-numberauthentication text stringVrrp group-numberpriority level 27-8 Configuration Examples for VrrpExample Configuring a Vrrp Master Router Example Configuring a Vrrp Backup Router 27-9 Example Vrrp Text Authentication 27-10 27-11 Feature Information for Hsrp and Vrrp 27-12 28-1 Configuring Link Layer Discovery Protocol Overview of Lldp How to Configure LldpConfiguring Lldp Restrictions for Lldp 28-3 Example Enabling Lldp Globally Configuration Example for LldpExample Configuring Hold Time Verifying Lldp 28-5 Example Configuring Delay TimeExample Configuring Intervals 28-6 28-7 28-8 Feature Information for Lldp 29-1 Configuring Multihop Bidirectional Forwarding Detection Information About Multihop BFD How to Configure Multihop BFDConfiguring Multihop BFD Template Restrictions for Multihop BFD 29-3 Configuration for Router a Configuration Examples for Multihop BFDConfiguring a Multihop BFD Map Example Configuring Multihop BFD Interface Fast Ethernet 6/0 Configuration for Router B29-5 Interface Fast Ethernet 0/1 29-6 29-7 Feature Information for Multihop BFD 29-8 30-1 Bit Error Rate TestingPrerequisites 30-2 How to Configure BertBert Pattern Description 30-3 Enable Configure terminal Controller t1 e1 slot/portPerforming Bert on a T1/E1 Line Terminating Bert on a T1/E1 Controller 30-4 Routerconfig-controller# no bert patternVerifying Bert on a T1/E1 Controller No bert pattern pattern interval time 30-5 Following is a sample configuration of the Bert feature 30-6 Feature Information for Bit Error Rate Testing 30-7 30-8 31-1 Microwave ACM Signaling and EEM Integration 31-2 Link Removal QoS Policy AdjustmentIGP Metric Adjustment Benefits 31-4 Configuring Connectivity Fault ManagementBridge-domainbridge-domain-id 31-5 31-6 31-7 Configuring EEP Applet Using CLIs 31-8 31-9 Configuring Event HandlerExits applet configuration mode An EEM applet is triggered 31-10 31-11 Example Configuring CFMExample Configuring EEP Applet Following is a sample configuration of CFM Action 104 set n $ringnodes 31-12 31-13 31-14 Action 442 cli command isis metric $dlc 31-15 Example Configuring Event HandlerFollowing is a sample configuration of Event Handler 31-16 Cisco ASR 901 Router CommandsCFM Support for Microwave Adaptive Bandwidth Transport Integration with Microwave ACM 31-17 31-18 32-1 IPv6 Support on the Cisco ASR 901 Router 32-2 Prerequisites for IPv6 Support on the Cisco ASR 901 Router 32-3 BenefitsOverview of IPv6 IPv6 Address Formats 32-4 Static ConfigurationIPv6 Addressing and Discovery IPv6 Address Type Preferred Format Compressed Format 32-5 Stateless AutoconfigurationICMPv6 32-6 IPv6 Duplicate Address DetectionIPv6 Neighbor Discovery IPv4 and IPv6 Dual-Stack on an Interface OSPFv3 for IPv6 Routing ProtocolsBidirectional Forwarding Detection for IPv6 IS-IS Enhancements for IPv6 32-8 Configuring IPv6 Addressing and Enabling IPv6 RoutingQoS for IPv6 32-9 Enables Cisco Express Forwarding CEF globally on Configuring a Static IPv6 RouteGlobal configuration mode Enables the forwarding of IPv6 unicast datagrams 32-11 Enabling Stateless Auto-ConfigurationAdministrative-multicast-distance -Optional Ipv6 address autoconfig 32-12 Ipv6 enable orImplementing IPv6 on Vlan Interfaces 32-13 Implementing IPv6 Addressing on Loopback Interfaces 32-14 Configuring ICMPv6 Rate LimitingEnable Configure terminal Ipv6 icmp error-interval interval 32-15 Configuring IPv6 Duplicate Address DetectionIpv6 nd dad attempts value 32-16 Configuring IPv6 Neighbor Discovery 32-17 Configuring IPv6 and IPv4 Dual-Stack on the Same Vlan Enables IPv6 address on the interface Configuring OSPFv3 for IPv6Configures an IPv4 address on the interface Configures IPv6 address on the interface Ipv6 router isis area-name Configuring IS-IS for IPv6Enable Configure terminal Router isis area-tag Net network-entity-tag 32-20 32-21 Configuring Multiprotocol-BGP for IPv6 32-22 Configuring BFD for IPv6Specifying a Static BFDv6 Neighbor 32-23 Associating an IPv6 Static Route with a BFDv6 NeighborInterface-number -SVI name 32-24 32-25 Configuring BFDv6 and OSPFv3 32-26 Configuring BFDv6 for BGP Verifying IPv6 Addressing Routing Exits global configuration mode and enters privilegedExec mode Implementing QoS for IPv6 Router# show ipv6 route Verifying a Static IPv6 Route32-28 Router# show ipv6 interface loopback Verifying a Stateless Auto-ConfigurationVerifying IPv6 Implementation on Vlan Interfaces 32-29 Router# show ipv6 interface loopback0 Verifying ICMPv6 ConfigurationVerifying IPv6 Implementation on Loopback Interfaces 32-30 Router# show ipv6 traffic 32-31 32-32 Verifying IPv6 Duplicate Address Detection Configuration Router# show ipv6 neighbors detail Verifying IPv6 Neighbor Discovery ConfigurationVerifying IPv6 and IPv4 Dual-Stack Configuration 32-33 Router# show ipv6 ospf Verifying OSPFv3 for IPv6 ConfigurationAs shown in the example 32-34 Router# show isis ipv6 rib Verifying IS-IS for IPv6 ConfigurationVerifying Multiprotocol-BGP for IPv6 Configuration 32-35 BGP 32-36 Router# show bfd neighbors Verifying BFD for IPv6 Configuration32-37 32-38 Verifying BFDv6 and OSPFv3 Configuration 32-39 Verifying BFDv6 for BGP Configuration Example Customizing ICMPv6 Example Configuring IPv6 Duplicate Address DetectionExample IPv6 Addressing on Vlan Interfaces Example IPv6 Addressing on Loopback Interfaces Example Configuring IPv6 Static Routing Example Configuring IPv6 Neighborhood DiscoveryExample Enabling IPv6 Stateless Address Autoconfiguration Example Configuring the IPv4 and IPv6 Dual-Stack Following is a sample configuration of OSPFv3 for IPv6 Example Configuring BFD and Static Routing for IPv6Example Configuring OSPFv3 for IPv6 Example Configuring BFD and OSPFv3 for IPv6 32-43 Example Configuring IS-IS for IPv6Following is a sample configuration of IS-IS for IPv6 32-44 Example Configuring Multiprotocol-BGP for IPv6 32-45 Example Configuring BFD and Multiprotocol-BGP for IPv6 Valid prefix pool for IPv6 No ipv6 nd suppress-ra command to enableDebug Commands Show Commands Platform Hardware Commands Route advertisement messages. Also, define a 32-47 32-48 32-49 32-50 Chapter of the IPv6 Configuration Guide provide 32-51 BGP for IPv6 chapter of the IPv6 Configuration GuideAggregation Services Router Software Configuration Guide 32-52 33-1 Labeled BGP Support 33-2 How to Configure Labeled BGP SupportOverview of Labeled BGP Support VPN/VRF over RFC 33-3 Configuration Example for Labeled SupportSend-label option Labels Verifying Labeled BGP Support33-4 Router# show bgp ipv4 unicast labels Router# show ip cef vrf LTE12 113.22.12.0 internal 33-5Vpnv4 all label Vpnv4 vrf LTE12 label 33-6 33-7 RFC-3107Carrying Label Information in BGP-4 33-8 Feature Information for Labeled BGP Support 34-1 Mpls Traffic Engineering Fast Reroute Link Protection 34-2 34-3 BFD-triggered Fast RerouteR2 R3 34-4 Fast RerouteLink Protection Mpls traffic-eng tunnels Enables Mpls TE tunnel signaling on the specified interfaceEnabling Mpls TE-FRR on an SVI Interface Enabling Mpls TE-FRR for EoMPLS on a Global Interface 34-6 Pseudowire-class pw-class-name 34-7 Enabling Mpls TE-FRR for EoMPLS on an InterfaceXconnect peer-ip-address vc-id pw-classpw-class-name 34-8 34-9 Enabling Mpls TE-FRR for IS-IS 34-10 34-11 Configuring Primary One-hop Auto-Tunnels 34-12 34-13 Configuring Backup Auto-Tunnels 34-14 Mpls ldp discovery targeted-hello accept command 34-15 Ip rsvp signalling hello bfdEnabling BFD Triggered FRR on an SVI Interface Messages from all neighbors 34-16 Configuration modeEnable Configure terminal Ip rsvp signalling hello bfd Enabling BFD Triggered FRR on a Router Router# show mpls traffic-eng tunnels brief Verifying Mpls TE-FRR ConfigurationVerification Examples 34-17 Router# show mpls traffic-eng fast-reroute database Use the following command to verify the reservation detailRouter# show mpls traffic-eng tunnels backup 34-18 Router# show ip rsvp fast-reroute Verifying Backup Auto-TunnelsVerifying Primary One-hop Auto-Tunnels 34-19 34-20 Verifying BFD Triggered FRR Configuration Database 34-21 Router# show ip rsvp hello 34-22 Router# show ip rsvp hello bfd nbr detail 34-23Router# show ip rsvp interface detail Router# show ip rsvp hello bfd nbr Example Configuring BFD Triggered FRR Example Configuring Mpls TE-FRRExample Configuring Primary One-hop Auto-Tunnels Example Configuring Backup Auto-Tunnels 34-25 Mpls TE FRR 34-26 34-27 34-28 35-1 Layer 2 Control Protocol Peering, Forwarding, and Tunneling 35-2 Layer 2 Control Protocol ForwardingLayer 2 Control Protocol Tunneling 35-3 35-4 Configuring Layer 2 PeeringDefault Action Configuration Option L2protocol peer protocol 35-5 Configuring Layer 2 Forwarding 35-6 Routerconfig-if# l2proto-forward tagged CdpRouterconfig-if# service instance Ethernet Protocol-Specifies the protocol to be forwarded 35-7 Configuring Layer 2 Tunneling 35-8 L2protocol tunnel protocol Bridge-domain bridge-id 35-9 Verifying Layer 2 PeeringVerifying Layer 2 Forwarding Verifying Layer 2 Tunneling 35-10 Example Configuring Layer 2 PeeringExample Configuring Layer 2 Forwarding Following is a sample configuration of layer 2 peering 35-11 Example Configuring Layer 2 Tunneling 35-12 Router 35-13 35-14 Commands Cisco IOS LAN Switching Commands 35-15 Following command was introduced l2proto-forward 35-16 36-1 Configuring Inverse Muliplexing over ATM 36-2 How to Configure IMA No ip address Atm bandwidth dynamic No atm ilmi-keepalive Configuring ATM IMA on T1/E1 InterfaceIma-groupima-group-number Interface ATMslot-number/IMAima-group-number 36-4 Configuring ATM IMA over MplsConfiguring the T1/E1 Controller 36-5 Configuring an ATM IMA InterfaceClock source internal Ima-groupgroup-number 36-6 Configuring ATM over Mpls Pseudowire InterfaceDisables the Ilmi keepalive parameters You can configure ATM over Mpls in the following modes 36-7 Configuring a Port Mode PseudowireConfiguring an N-to-1 VCC Cell Mode Configures the ATM interface 36-8 Configuring an N-to-1 vPC Cell ModeEnable Configure terminal Interface ATMslot/IMAgroup-number Xconnect ip-addressport-numberencapsulation mpls one-to-one 36-9 ATM AAL5 SDU VCC Transport 36-10 Verifying IMA ConfigurationsSets the encapsulation type to AAL5. AAL5 is the default L2transport encapsulation for the VCC mode 36-11 How to Configure ATM Class of ServiceConfiguring Constant Bit Rate Enters the global configuration mode 36-12 Configuring Unspecified Bit RateMode Ubr+ pcr-rate mcr-rate Configuring Unspecified Bit Rate PlusATM class of service with the rate equal to the bandwidth IMA links and the bandwidth of each link Mcr-rate-Peak cell rate in Mbps Configures the UBR+ QoS class for an ATM permanent virtualCircuit and specifies the bandwidth Pcr-rate-Peak cell rate in Kbps 36-15 Configuration ExamplesExample Configuring a Port Mode Pseudowire Example Creating an IMA Interface Example Configuring UBR Example Configuring an N-to-1 VCC Cell ModeExample Configuring an N-to-1 VPC Cell Mode Example Configuring CBR Example Configuring VBR for Non-Real Time Traffic Configuring Marking Mpls Experimental BitsExample Configuring UBR Plus Example Configuring VBR for Real Time Traffic 36-18 Applying the Policy-mapApplying a Policy map on PVC and PVP 36-19 Disables the Ilmi trap parametersSets the PVC encapsulation type to AAL0 Attaches a policy map to the input interface 36-20 Applying a Policy map on ATM IMA Interface Interface ATM slot/IMA group-number Creating a Table-mapTable-maptable-map-name 36-21 36-22 Default copyCreating a Policy-map for SVI Interface Map from from-value to to-value 36-23 Applying a Service Policy on SVI InterfaceMpls ip Service-policy output policy-map-name 36-24 36-25 36-26 Feature Information for Inverse Multiplexing over ATM 37-1 IPv6 over Mpls 6PE and 6VPE 37-2 37-3 Benefits of 6PE and 6VPEIPv6 on Provider Edge Routers PE equipment, connected to CEs and entry IPv6 on VPN Provider Edge RoutersComponents of MPLS-based 6VPE Network IPv6 router on the customer 37-5 Supported Features Interface Numbers How to Configure IPv6 over Mpls 6PE and 6VPEConfiguring 6PE Scalability Numbers 37-7 Address-family ipv6Exit-address-family 37-8 37-9 Configuring 6VPESetting up IPv6 Connectivity from PE to CE Routers 37-10 Setting up MP-BGP Peering to the Neighboring PEVRF table for an IPv6 address Vrf-name-Optional a specific VRF table for an IPv6 Extended-Specifies that only extended communities will be Places the router in address family configuration mode forEnable the exchange of information with a BGP neighbor Address prefixes 37-12 Setting up MPLS/IPv4 Connectivity with LDP 37-13 Creating IPv6 VRFs on PE Routers Address-family ipv4 To configure dual-stack VRF, complete the following stepsSessions that use standard IPv4 address prefixes 37-14 Router# show ipv6 protocols vrf vpe1 Verifying IPv6 over Mpls 6PE and 6VPE Configuration37-15 Router# show bgp vpnv6 unicast all Router# show ipv6 cef vrf cisco1 37-16 Router# show mpls forwarding-table vrf vpe1 37-17Router# show ipv6 route vrf Router# show bgp ipv6 200133/64 Example Configuring 6PEFollowing is a sample configuration of 6PE 37-18 37-19 Example Configuring 6VPEFollowing is a sample configuration of 6VPE 37-20 37-21 Feature Information for IPv6 over Mpls 6PE and 6VPE 37-22 38-1 Storm Control 38-2 Configuring Storm Control 38-3 38-4 Verifying Storm Control Storm-control Configuring Error Disable RecoveryErrdisable recovery cause 38-5 Cause Monitoring Error Disable RecoverySeconds-Specifies the time to recover from a specified Error-disable cause Router# debug platform hardware ether SC Configuration Example for Storm Control38-7 38-8 38-9 Feature Information for Storm Control 38-10 39-1 Remote Loop-Free Alternate Fast Reroute 39-2 Remote LFA-FRR Link Protection 39-3 39-4 Pseudowire Redundancy over FRRBenefits of Remote LFA-FRR Avoiding Traffic Drops 39-5 Conditions for SwitchoverCESoPSN, SAToP, and ATM/IMA 39-6 Configuring Remote LFA-FRR for IS-IS Ip router isis Switch Virtual Interface SVISpecifies an IP address for the specified interface 39-7 39-8 39-9 Configuring Remote LFA-FRR for Ospf Router ospf Enables the Ospf routing protocol and enters the router39-10 39-11 Configuring Remote LFA-FRR for Ethernet and TDM PseudowiresEnables Mpls LDP synchronization on interfaces for an Ospf 39-12 Configuring Remote LFA-FRR on a Global InterfaceAccept-Configures the router to respond to requests for Targeted hello messages from all neighbors 39-13 Configuring Remote LFA-FRR on a GigabitEthernet Interface 39-14 Configuring Remote LFA-FRR on an SVI Interface 39-15 Configuring Remote LFA-FRR on IS-IS 39-16 Passive-interfaceinterface-type interface-number 39-17 39-18 39-19 Configuring LFA-FRR for EoMPLSDisables sending routing updates on an interface Backup peer peer-ip-address vc-id Negotiation auto Removes an IP address or disables IP processingEnables automatic negotiation 39-20 39-21 Configuring LFA-FRR for ATM/IMA 39-22 39-23 Configuring LFA-FRR for CESoPSNBackup peer peer-ip-address Exit Interface CEM slot/port No ip address 39-24 39-25 Configuring LFA-FRR for SAToPExit Interface CEM slot/port 39-26 39-27 Verification Examples for Remote LFA-FRR Router# show ip cef 171.1.1.0 internal Verifying Remote LFA-FRR Configuration39-28 Router# show ip ospf fast-reroute remote-lfa tunnels Router# show isis fast-reroute remote-lfa tunnels 39-29Router# show ip ospf rib Router# show mpls l2transport vc 1 detail 39-30Router# show isis rib 39-31 Router# show mpls l2transport vc 3001 detail 39-32 Router# show mpls l2 vc 90 detail Verifying Remote LFA-FRR Configuration on IS-ISVerifying Remote LFA-FRR Configuration on ATM/IMA 39-33 Router# show mpls l2 vc 111 detail Verifying Remote LFA-FRR Configuration on CESoPSN39-34 39-35 Configuration Examples for Remote LFA-FRRVerifying Remote LFA-FRR Configuration on SAToP 39-36 Example Configuring Remote LFA-FRR for IS-ISExample Configuring Remote LFA-FRR for Ospf Example Configuring Remote LFA-FRR Globally 39-37 Example Configuring Remote LFA-FRR on an SVI InterfaceExample Configuring EoMPLS Pseudowire Redundancy over FRR Example Configuring LFA-FRR on ATM/IMA 39-38 Example Configuring LFA-FRR on CESoPSNExample Configuring LFA-FRR on SAToP 39-39 39-40 Reroute, 40-1 Digital Optical Monitoring 40-2 How to Enable Transceiver MonitoringEnters transceiver type configuration mode Routerconfig# transceiver type all 40-3 Show interfaces transceiver commandExamples Example Displaying Transceiver Information Router# show interfaces transceiver detail Example Displaying Detailed Transceiver Information40-4 40-5 Example Displaying List of Supported Transceivers 40-6 Example Displaying Threshold Tables 40-7 40-8 Router# show interfaces transceiver threshold violations Example When Transceiver Monitoring is DisabledExample Displaying Threshold Violations 40-9 40-10 Example Displaying SPF Details SCP6G44-C1-BMH 40-11 40-12 SFF-8472 40-13 Feature Information for Digital Optical Monitoring 40-14 41-1 IPv4 Multicast 41-2 Protocol Independent Multicast Supported ProtocolsPIM SSM for IPv4 Source Specific Multicast 41-4 IGMPv1IGMPv2 IGMPv3 Static SSM Mapping Ip igmp static ssm-map commandPIM SSM Mapping Reverse Path Forwarding Ip pim sparse-mode Asr901-multicast source Configuring IPv4 MulticastEnables multicast routing Enabling IPv4 Multicast Routing 41-7 Configuring PIM SSMEnable Configure terminal Ip pim ssm default Ip pim sparse-mode Ip igmp version 41-8 Configuring PIM SSM MappingIp igmp ssm-map static access-list source-address 41-9 Verifying IPv4 Multicast RoutingVerifying PIM SSM Router# show ip igmp ssm-mapping Verifying PIM SSM Mapping41-10 Router# show ip mroute Show ip igmp groups interface-type detail Configuration Examples for IPv4 MulticastShow ip igmp groups group-address Show ip igmp groups interface-type interface-number 41-12 Example Configuring PIM SSMExample Configuring PIM SSM Mapping Example IPv4 Multicast Routing Router# debug ip igmp Example Configuring Rendezvous Point41-13 41-14 41-15 41-16 Feature Information for IPv4 Multicast 41-17 IGMPv2, 41-18 42-1 IPv6 Multicast 42-2 42-3 IPv6 Multicast GroupsIPv6 Multicast Routing Implementation Multicast Listener Discovery Protocol for IPv6 42-4 Protocol Independent Multicast 42-5 PIM-Sparse ModePIM Source Specific Multicast Source Specific Multicast Mapping for IPv6 42-6 Configuring IPv6 MulticastEnabling IPv6 Multicast Routing Rendezvous Point 42-7 Enable Configure terminal No ipv6 mfibDisabling IPv6 Multicast Forwarding 42-8 Disables IPv6 multicast forwarding on the routerDisabling MLD Device-Side Processing No ipv6 mld router No ipv6 mld router Configuring MLD Protocol on an Interface42-9 42-10 Configuring a Rendezvous Point 42-11 Configuring PIM SSM OptionsEnable Configure terminal Ipv6 pim No ipv6 pim Configuring IPv6 SSM MappingDisables PIM on the specified interface Disabling PIM SSM Multicast on an Interface 42-13 Configure terminal Ipv6 mld vrf vrf-namessm-map enableVerifying IPv6 Multicast No ipv6 mld vrf vrf-namessm-map query dns Router# show ipv6 pim interface 42-14Router# show ipv6 mld interface gigabitethernet 0/1 Router# show ipv6 mld traffic Router# show ipv6 pim neighbor count 42-15Router# show ipv6 mld groups summary Router# show ipv6 pim topology 42-16Router# show ipv6 pim neighbor Router# show ipv6 mroute Router# show ipv6 pim range-list 42-17Router# show ipv6 pim topology route-count Router# show ipv6 pim group-map FF0EE0111 Router# show ipv6 pim join-prune statistic 42-18Router# show ipv6 pim traffic 42-19 Following example Router# show ipv6 mfib interface 42-20Router# show ipv6 mfib status Router# show ipv6 mfib summary 42-21 Configuration Examples for IPv6 MulticastExample Configuring IPv6 SSM Mapping Example Enabling IPv6 Multicast Routing 42-22 Command Name Description 42-23 42-24 Feature Information for IPv6 MulticastChapter of the IP Multicast PIM Configuration Guide 42-25 Chapter of the IP Multicast LSM Configuration Guide 42-26 43-1 Configuring Switched Port AnalyzerSpan Limitations and Configuration Guidelines 43-2 Understanding SpanFollowing sections describe Span 43-3 Span SessionSource Interface Span Traffic Configuring SpanDestination Interface Traffic Types 43-5 Removing Sources or Destination from a Span Session Verifying Local Span Configuration Examples for SpanEnable Configure terminal No monitor session sessionnumber Clears existing Span configuration for a session Rspan Vlan 43-7 43-8 43-9 Feature Information for Switched Port Analyzer 43-10 IN-1 See BSC IN-2 IN-3 IN-4 IN-5 IN-6 See MSC IN-7 IN-8 IN-9 IN-10