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Cisco Systems OL-4580-01 Configuring the Address Resolution Protocol, Showing ARP Information

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Chapter 4 Configuring the Address Resolution Protocol

Showing ARP Information

To display the resolution for a host IP address, enter:

#show arp 192.50.1.6

To display the host IP addresses entered at initialization or boot time through

ARP, enter:

#show arp file

	Cisco Content Services Switch Routing and Bridging Configuration Guide

OL-4580-01		4-9
OL-4580-01		4-9

Page 135

Image 135

Cisco Systems OL-4580-01 manual Configuring the Address Resolution Protocol, Showing ARP Information, # show arp file

Contents

Corporate Headquarters Cisco Content Services Switch Routing and Bridging ConfigurationGuide Software Version JanuaryCopyright 2004, Cisco Systems, Inc. All rights reserved Preface C O N T E N T SShowing Interface Information Configuring CircuitsConfiguring Circuit-IP Unreachables Enabling BPDU GuardConfiguring Spanning -Tree Bridging for the CSS Configuring Router-Discovery Limited-BroadcastConfiguring Spanning-Tree Bridge Aging-Time Configuring Spanning-Tree Bridge PriorityOSPF Overview AreasStub Area OSPF Configuration in a Startup-Configuration File Setting the Retransmission IntervalShowing the Configured Advertised ASE Routes Showing Summary Route Configuration InformationConfiguring an IP Source Route Configuring Routing Information ProtocolConfiguring the Internet Protocol ContentsContents Setting the CDP Hold TimeConfiguring the Cisco Discovery Protocol Configuring the DHCP Relay AgentOL-4580-01 ContentsExample of SPAN Connectivity Interface Trunking Between VLANsF I G U R E S CSS Interfaces and CircuitsOL-4580-01 FiguresField Descriptions for the show circuits Command Field Description for the show bridge port-fast CommandGlobal OSPF Configuration Quick Start Interface and Circuit Configuration Quick StartRIP Configuration Quick Start IP Configuration Quick StartField Descriptions for the show ospf ase Command Field Descriptions for the show ospf redistribute CommandDocumentation Feedback Obtaining Technical Assistance PrefaceAudience How to Use This Guide Related Documentation Symbols and Conventions Obtaining DocumentationConfigure the CSS interface ports and circuits for How to Use This GuideAudience Chapter 1, ConfiguringChapter 8, Configuring Related DocumentationChapter 7, Configuring Configure Cisco Discovery Protocol CDPDocument Title Descriptionxviii Description Document TitleSymbols and Conventions Obtaining Documentation Cisco.comOrdering Documentation http//tools.cisco.com/RPF/register/register.do Documentation FeedbackObtaining Technical Assistance Cisco Technical Support WebsiteOpening a TAC Case TAC Case Priority Definitionsxxiii Obtaining Additional Publications and Information http//cisco.com/univercd/cc/td/doc/pcatxxiv Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL xxvi Preface Obtaining Additional Publications and InformationOL-4580-01 Configuring Circuits Configuring RIP for an IP Interface Interface and Circuit OverviewConfiguring Interfaces and Circuits Interface and Circuit Overview Configuring InterfacesFor an 802.1Q trunk, you can use the default-vlan command to Figure 1-1 CSS Interfaces and Circuits Figure 1-2 Interface Trunking Between VLANsTrunk Task and Command Example Interface and Circuit Configuration Quick Start8. Optional Display the interface configuration Task and Command ExampleSetting Interface Maximum Idle Time Bridging an Interface to a VLAN Configuring InterfacesConfiguring an Interface Entering a Description for the Interface Configuring Interface Duplex and SpeedEntering a Description for the Interface Configuring an InterfaceConfiguring Interface Duplex and Speed Use the phy command to configure the duplex, speed Fast Ethernet ports only, and flow control Gigabit Ethernet ports only for the interface ports, as follows 1-10 Setting Interface Maximum Idle TimeBridging an Interface to a VLAN Specifying VLAN Trunking for an Interface1-11 Chapter 1 Configuring Interfaces and Circuits Configuring Interfaces config-trunkif2/3# no trunk1-12 Selecting a Default VLAN in a Trunk config-if-vlan1/1-3# no default-vlan1-13 Configuring Spanning-Tree Bridge State Configuring Spanning-Tree Bridging for a VLAN or a Trunked InterfaceConfiguring Spanning-Tree Bridge Pathcost Configuring Spanning-Tree Bridge Port PriorityConfiguring Spanning-Tree Bridge Pathcost Configuring Spanning-Tree Bridge Port Priority1-15 1-16 Configuring Port Fast on an InterfaceConfiguring Spanning-Tree Bridge State Enabling Port Fast Enabling BPDU Guard Showing Port Fast Informationconfig-if2/1# bridge port-fast disable Enabling Port FastEnabling BPDU Guard config-if2/1# bridge port-fast enableDescription Showing Port Fast Informationdisabled command FieldShowing Interface Statistics Showing Ethernet Interface Errors Showing Interface ConfigurationsShowing Bridge Configurations Showing Bridge Configurations Showing Trunking ConfigurationsDescription FieldDescription Field1-21 Command continuedField DescriptionDescription Showing Trunking ConfigurationsShowing Interface Information FieldDescription Showing Interface Duplex and SpeedTable 1-6 Field Descriptions for the show interface Command FieldDescription Showing Interface StatisticsTable 1-7 Field Descriptions for the show phy Command Field1-25 Table 1-8 describes the fields in the show mibii command outputField Description1-26 Table 1-8 Field Descriptions for the show mibii Command continuedField Description1-27 Showing Ethernet Interface ErrorsField DescriptionField Description1-28 config-ife3# shut Shutting Down an InterfaceShutting Down All Interfaces config-ife3# admin-shutdownRestarting an Interface Restarting All Interfaces1-30 Entering Circuit Configuration Mode Configuring CircuitsEntering Circuit Configuration Mode Configuring a Circuit IP InterfaceConfiguring a Circuit IP Address Configuring a Circuit-IP Broadcast Address1-32 config-circuit-ipVLAN7-172.16.6.58# no redirects Configuring Circuit-IP RedirectsConfiguring Circuit-IP Unreachables Configuring Router-Discovery Preference for a Circuit IP InterfaceEnabling and Disabling a Circuit IP Configuring Router-Discovery Protocol Settings for a Circuit1-34 Configuring Router-Discovery Limited-Broadcast Configuring the Router-Discovery LifetimeConfiguring Router-Discovery Limited-Broadcast Configuring the Router-Discovery Lifetimeconfig-circuitVLAN7# router-discovery min-advertisement-interval 100 Configuring the Router-Discovery Max-Advertisement-IntervalConfiguring the Router-Discovery Min-Advertisement-Interval config-circuitVLAN7# router-discovery max-advertisement-interval 300Description Showing CircuitsTable 1-10 Field Descriptions for the show circuits Command FieldDescription Showing IP InterfacesTable 1-11 Field Descriptions for the show ip interfaces Command FieldConfiguring a RIP Receive Version Configuring RIP Send Version Configuring RIP for an IP InterfaceEnabling RIP on an IP Interface Enabling RIP on an IP Interface Configuring a RIP Default Routeconfig-circuit-ipVLAN7-192.168.1.58# rip default-route Configuring a RIP Default RouteConfiguring a RIP Receive Version Configuring RIP Send VersionConfiguring RIP Packet Logging Showing RIP Configurations for IP Addresses1-41 1-42 Table 1-12 Field Descriptions for the show rip CommandField DescriptionDescription FieldDescription Field1-44 Configuring the Switched Port Analyzer FeatureSSPAN Tx 1-45Figure 1-3 Example of SPAN Connectivity SSPAN Rx1-46 Configuring SPAN on a CSSConfiguring SPAN on a CSS Verifying the SPAN Configuration on a CSS setspan srcport number destport number copyBothcopyTxOnlycopyRxOnly1-47 Verifying the SPAN Configuration on a CSSField Description1-48 Table 1-15 Field Descriptions for the show setspan Command continuedField DescriptionC H A P T E R Configuring Spanning-Tree Bridging for the CSSConfiguring Spanning-Tree Bridge Hello-Time CSS Spanning-Tree Bridging Quick StartConfiguring Spanning-Tree Bridge Aging-Time Configuring Spanning-Tree Bridge Forward-TimeConfiguring Spanning-Tree Bridge Aging-Time Task and Command ExampleTable 2-1 Spanning-Tree Bridging Configuration Quick Start continued Configuring Spanning-Tree Bridge Hello-Time Configuring Spanning-Tree Bridge Max-AgeConfiguring Spanning-Tree Bridge Forward-Time Disabling Bridge Spanning-Tree Configuring Spanning-Tree Bridge PriorityField Showing Bridge ConfigurationsField DescriptionDescription FieldChapter 2 Configuring Spanning-Tree Bridging for the CSS Showing Bridge ConfigurationsOL-4580-01 OSPF Configuration in a Startup-Configuration File Configuring Open Shortest Path First OSPFOSPF Overview CSS OSPF Configuration Quick Start Configuring OSPF on the CSS Configuring OSPF on a CSS IP InterfaceOSPF Routing Hierarchy Link-State Databases OSPF OverviewOSPF Routing Hierarchy Autonomous System AreasBackbone Area Area Border Routers Stub AreaAutonomous System Boundary Routers Link-State Databases OSPF IP Interface Configuration Quick Start CSS OSPF Configuration Quick StartGlobal OSPF Configuration Quick Start Global OSPF Configuration Quick Startconfig ospf area Task and Command ExampleTable 3-1 Global OSPF Configuration Quick Start config ospf router-idTask and Command Example OSPF IP Interface Configuration Quick Startconfig-circuit-ipVLAN6-3.1.2.2 ospf area Task and Command Exampleconfig-circuitVLAN6# ip address 3.1.2.2/24 config-circuit-ipVLAN6-3.1.2.2# ospf3-11 Verifying Your ConfigurationConfiguring Equal-Cost Routes Configuring Summarized Routes at an ABR Configuring OSPF on the CSSConfiguring the OSPF Router ID Configuring the OSPF Router ID Enabling OSPF Configuring an AreaConfiguring an Area Enabling OSPF3-13 3-14 Configuring Equal-Cost RoutesConfiguring Summarized Routes at an ABR Removing an Areaconfig# ospf range 0.1.0.1 192.168.0.0 255.255.0.0 block Configuring the CSS as an Autonomous System Boundary Routerconfig# no ospf enable config# ospf range 0.1.0.1 192.168.0.0 config# no ospf range 0.1.0.1 192.168.0.03-16 Advertising a Route as an OSPF ASE RouteAdvertising a Default ASE Route Advertising Other Routes Through OSPF Advertising a Route as an OSPF ASE RouteOL-4580-01 Chapter 3 Configuring Open Shortest Path First OSPFConfiguring OSPF on the CSS 3-173-18 Chapter 3 Configuring Open Shortest Path First OSPFConfiguring OSPF on the CSS config# ospf advertise 192.168.44.0config# no ospf advertise config# ospf advertise 193.23.44.0 255.255.255.0 metric 3 type13-19 Advertising a Default ASE Route config# ospf default3-20 config# ospf redistribute firewall Advertising Other Routes Through OSPFconfig# ospf default metric 10 type1 config# no ospf defaultAssigning an OSPF Area to the Interface Configuring OSPF on a CSS IP InterfaceConfiguring the CSS IP Interface as an OSPF Interface Enabling OSPF on the Interface Configuring the Interface Attributes3-23 Configuring the CSS IP Interface as an OSPF InterfaceSetting the Cost Setting the Dead Router Interval Configuring the Interface AttributesAssigning an OSPF Area to the Interface Enabling OSPF on the InterfaceSetting the Retransmission Interval Setting the Transit-Link Delay Setting the CostSetting the Dead Router Interval Setting the Hello Packet IntervalSetting the Password Setting the Poll Interval3-26 Setting the Priority of the CSS Setting the Retransmission Interval3-27 Showing Summary Route Configuration Information Setting the Transit-Link DelayShowing OSPF Information Showing ASE Entries Showing the Configured Advertised ASE RoutesDescription Showing OSPF Area InformationShowing Global Statistics FieldField Showing IP Interface InformationField DescriptionField Description3-31 Field Description3-32 3-33 Showing Link-State DatabasesField Description3-34 Table 3-6 Field Descriptions for the show ospf lsdb CommandField Description3-35 FieldDescription ADV RouterDescription Showing ASE Entriesshow ospf asegrep FieldDescription Showing the Configured Advertised ASE RoutesTable 3-8 Field Descriptions for the show ospf advertise Command Field3-38 Showing the Redistribution PolicyFirewall Field DescriptionDescription Showing Summary Route Configuration InformationShowing OSPF Neighbors Field3-40 FieldDescription AddressField Description3-41 Field Description3-42 GLOBAL ospf router-id 121.23.21.1 ospf enable OSPF Configuration in a Startup-Configuration FileChapter 3 Configuring Open Shortest Path First OSPF OSPF Configuration in a Startup-Configuration FileOL-4580-01 Chapter 3 Configuring Open Shortest Path First OSPFOSPF Configuration in a Startup-Configuration File 3-44Configuring ARP Timeout Configuring ARP Wait Updating ARP Parameters Configuring the Address ResolutionProtocol ARP Configuration Quick Start Configuring ARP MappingARP Configuration Quick Start Task and Command ExampleTable 4-1 ARP Configuration Quick Start arp iporhost macaddress interface vlan Configuring ARP MappingConfiguring ARP Wait Configuring ARP TimeoutClearing ARP Parameters Updating ARP Parametersshow arp configfilemanagement-portsummaryiporhost Showing ARP InformationDescription Table 4-2 Field Descriptions for the show arp CommandTable 4-3 Field Descriptions for the show arp summary Command FieldField Table 4-4 Field Descriptions for the show arp config CommandTable 4-5 Field Descriptions for the show arp management-port Command # show arp config# show arp file Chapter 4 Configuring the Address Resolution ProtocolShowing ARP Information # show arpOL-4580-01 Chapter 4 Configuring the Address Resolution Protocol4-10 Showing ARP InformationShowing RIP Configurations Configuring Routing Information ProtocolRIP Configuration Quick Start Configuring RIP Advertise Configuring RIP Redistribute Configuring Equal-Cost RIP RoutesRIP Configuration Quick Start Task and Command ExampleTable 5-1 RIP Configuration Quick Start Configuring RIP Advertise Configuring RIP Redistributerip redistribute firewalllocalospfstatic metric Configuring Equal-Cost RIP Routes Description Showing RIP ConfigurationsTable 5-2 Field Descriptions for the show rip Command FieldDescription Table 5-2 Field Descriptions for the show rip Command continuedTable 5-3 Field Descriptions for the show rip globals Command FieldTable 5-4 Field Descriptions for the show rip statistics Command FieldDescription Chapter 5 Configuring Routing Information Protocol Showing RIP ConfigurationsOL-4580-01 Configuring an IP Source Route Configuring the IP Record Route Configuring the Internet ProtocolIP Configuration Quick Start Configuring an IP Route Disabling an Implicit Service for the Static Route Next HopIP Configuration Quick Start Task and Command ExampleTable 6-1 IP Configuration Quick Start ip no-implicit-service ip redundancy Configuring an IP RoutePage 0.0.0.0 /0 and a next hop address of 192.167.1.1, enter Disabling an Implicit Service for the Static Route Next Hop config# no ip source-route Configuring an IP Source RouteConfiguring the IP Record Route config# ip source-routeConfiguring Box-to-Box Redundancy Configuring IP Equal-Cost Multipathip ecmp addressno-prefer-ingressroundrobin ip subnet-broadcast command Forwarding IP Subnet Broadcast Addressed FramesConfiguring IP Unconditional Bridging Configuring IP Opportunistic Layer 3 Forwarding6-10 VLAN1 End Station A Internet Router1 default Subnet CSS6-11 Figure 6-1 Example of Opportunistic Layer 3 ForwardingShowing IP Statistics Showing a Summary of IP Global Statistics Showing IP Configuration InformationShowing IP Global Configuration Parameters Showing IP Interface Information Showing IP Routing InformationDescription Showing IP Global Configuration ParametersTable 6-2 Field Descriptions for the show ip config Command FieldDescription Table 6-3 Field Descriptions for the show ip interfaces CommandShowing IP Interface Information Field6-15 Showing IP Routing InformationField DescriptionField Showing IP StatisticsField DescriptionTCP Statistics FieldDescription 6-17ICMP Statistics FieldDescription 6-18ARP Statistics FieldDescription 6-19Description Resetting IP StatisticsShowing a Summary of IP Global Statistics Field6-21 FieldDescription Total HostsOL-4580-01 Chapter 6 Configuring the Internet ProtocolShowing IP Configuration Information 6-22C H A P T E R Configuring the Cisco Discovery ProtocolTask and Command Example CDP Configuration Quick StartCDP Configuration Quick Start Enabling CDP Setting the CDP Hold Time Setting the CDP Transmission Rate Showing CDP InformationSetting the CDP Hold Time Enabling CDPcdp holdTime 255 cdp timer Sending CDP packets every 60 seconds Setting the CDP Transmission RateShowing CDP Information config# show cdp Global CDP informationC H A P T E R Configuring the DHCP Relay AgentDHCP Relay Agent Configuration Quick Start Displaying the DHCP Relay ConfigurationDHCP Relay Agent Configuration Quick Start Task and Command ExampleTable 8-1 DHCP Relay Agent Configuration Quick Start Enabling and Disabling DHCP on the Circuit Adding a DHCP Destination on a CircuitDescription Displaying the DHCP Relay ConfigurationDefining the Hops Field Value for Forwarding DHCP Messages FieldDescription FieldChapter 8 Configuring the DHCP Relay Agent Displaying the DHCP Relay ConfigurationOL-4580-01 IN-1 I N D EIN-2 2-2, 4-2, 5-2, 6-23-12 IN-3 IN-4 IN-5 IN-6 IN-7 IN-8 IN-9 IndexOL-4580-01 IN-10 IndexOL-4580-01