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Cisco Systems OL-4580-01 manual Configuring Open Shortest Path First OSPF, C H A P T E R

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C H A P T E R 3

Configuring Open Shortest Path First (OSPF)

This chapter provides configuration and viewing information for the Open Shortest Path First (OSPF) protocol. Information in this chapter applies to all CSS models, except where noted.

Note The CSS supports OSPF Version 2, as defined in RFC 2178. For detailed information about OSPF MIB objects, refer to RFC 1850.

This chapter contains the following major sections:

•OSPF Overview

•CSS OSPF Configuration Quick Start

•Configuring OSPF on the CSS

•Configuring OSPF on a CSS IP Interface

•Showing OSPF Information

•OSPF Configuration in a Startup-Configuration File

	Cisco Content Services Switch Routing and Bridging Configuration Guide

OL-4580-01		3-1
OL-4580-01		3-1

Page 83

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Cisco Systems OL-4580-01 manual Configuring Open Shortest Path First OSPF, C H A P T E R, Showing OSPF Information

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 PriorityStub Area OSPF OverviewAreas 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 CDPxviii Document TitleDescription Description Document TitleSymbols and Conventions Ordering Documentation Obtaining DocumentationCisco.com http//tools.cisco.com/RPF/register/register.do Documentation FeedbackObtaining Technical Assistance Cisco Technical Support Websitexxiii Opening a TAC CaseTAC Case Priority Definitions xxiv Obtaining Additional Publications and Informationhttp//cisco.com/univercd/cc/td/doc/pcat 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 OL-4580-01 xxviPreface Obtaining Additional Publications and Information 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 Trunk Figure 1-1 CSS Interfaces and CircuitsFigure 1-2 Interface Trunking Between VLANs 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 Time1-11 Bridging an Interface to a VLANSpecifying VLAN Trunking for an Interface 1-12 Chapter 1 Configuring Interfaces and Circuits Configuring Interfacesconfig-trunkif2/3# no trunk 1-13 Selecting a Default VLAN in a Trunkconfig-if-vlan1/1-3# no default-vlan 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 Priority1-15 Configuring Spanning-Tree Bridge PathcostConfiguring Spanning-Tree Bridge Port Priority 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 Description1-28 FieldDescription config-ife3# shut Shutting Down an InterfaceShutting Down All Interfaces config-ife3# admin-shutdown1-30 Restarting an InterfaceRestarting All Interfaces Entering Circuit Configuration Mode Configuring CircuitsEntering Circuit Configuration Mode Configuring a Circuit IP Interface1-32 Configuring a Circuit IP AddressConfiguring a Circuit-IP Broadcast Address config-circuit-ipVLAN7-172.16.6.58# no redirects Configuring Circuit-IP RedirectsConfiguring Circuit-IP Unreachables Configuring Router-Discovery Preference for a Circuit IP Interface1-34 Enabling and Disabling a Circuit IPConfiguring Router-Discovery Protocol Settings for a Circuit 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 Version1-41 Configuring RIP Packet LoggingShowing RIP Configurations for IP Addresses 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-TimeTable 2-1 Spanning-Tree Bridging Configuration Quick Start continued Configuring Spanning-Tree Bridge Aging-TimeTask and Command Example Configuring Spanning-Tree Bridge Forward-Time Configuring Spanning-Tree Bridge Hello-TimeConfiguring Spanning-Tree Bridge Max-Age Disabling Bridge Spanning-Tree Configuring Spanning-Tree Bridge PriorityField Showing Bridge ConfigurationsField DescriptionDescription FieldOL-4580-01 Chapter 2 Configuring Spanning-Tree Bridging for the CSSShowing Bridge Configurations 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 Backbone Area Autonomous SystemAreas Autonomous System Boundary Routers Area Border RoutersStub Area 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 Area3-13 Configuring an AreaEnabling OSPF 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 192.168.44.03-19 config# no ospf advertiseconfig# ospf advertise 193.23.44.0 255.255.255.0 metric 3 type1 3-20 Advertising a Default ASE Routeconfig# ospf default 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 Interval3-26 Setting the PasswordSetting the Poll Interval 3-27 Setting the Priority of the CSSSetting the Retransmission Interval 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 Description3-31 FieldDescription 3-32 FieldDescription 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 Address3-41 FieldDescription 3-42 FieldDescription 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 MappingTable 4-1 ARP Configuration Quick Start ARP Configuration Quick StartTask and Command Example 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 RoutesTable 5-1 RIP Configuration Quick Start RIP Configuration Quick StartTask and Command Example rip redistribute firewalllocalospfstatic metric Configuring RIP AdvertiseConfiguring RIP Redistribute 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 FieldDescription Table 5-4 Field Descriptions for the show rip statistics CommandField OL-4580-01 Chapter 5 Configuring Routing Information ProtocolShowing RIP Configurations 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 HopTable 6-1 IP Configuration Quick Start IP Configuration Quick StartTask and Command Example 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-routeip ecmp addressno-prefer-ingressroundrobin Configuring Box-to-Box RedundancyConfiguring IP Equal-Cost Multipath ip subnet-broadcast command Forwarding IP Subnet Broadcast Addressed Frames6-10 Configuring IP Unconditional BridgingConfiguring IP Opportunistic Layer 3 Forwarding 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 Informationcdp holdTime 255 cdp timer Setting the CDP Hold TimeEnabling CDP 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 ConfigurationTable 8-1 DHCP Relay Agent Configuration Quick Start DHCP Relay Agent Configuration Quick StartTask and Command Example 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 FieldOL-4580-01 Chapter 8 Configuring the DHCP Relay AgentDisplaying the DHCP Relay Configuration IN-1 I N D E3-12 IN-22-2, 4-2, 5-2, 6-2 IN-3 IN-4 IN-5 IN-6 IN-7 IN-8 OL-4580-01 IN-9Index OL-4580-01 IN-10Index