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Cisco Systems 78-11741-02 manual IPC-274

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Configuring EIGRP

EIGRP Configuration Examples

instead, this traffic will be sent to the null 0 interface where it is dropped.

The recommended way to send only the default route out a given interface is to use a distribute-listcommand. You can configure this command to filter all outbound route advertisements sent out the interface with the exception of the default (0.0.0.0).

Cisco IOS IP Configuration Guide

IPC-274

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Cisco Systems 78-11741-02 manual IPC-274

Contents

Cisco IOS Configuration Guide Corporate HeadquartersCisco IOS IP Configuration Guide N T E N T S IiiIP Multicast IPC-4 Benefits IPC-35 Configuring the Default Router for the Client Vii Enabling the Cisco IOS Dhcp Client on Ethernet InterfacesEnabling Hsrp IPC-101 ViiiEnabling CEF IPC-116 Slow Start IPC-137 Registration IPC-162 Routing Enabling HA Redundancy for a Physical Network IPC-172 XiiConfiguring Interpacket Delay XiiiEnabling Ospf IPC-225 XivChanging Ospf Administrative Distance Example IPC-252 Configuring Integrated IS-IS XviBGP Multipath Support XviiIndicating Backdoor Routes XviiiBGP Path Filtering by Neighbor Examples IPC-340 XixFiltering Sources of Routing Information PIM XxiRestrictions IPC-412 XxiiXxiii IPC-430SSM Operations IPC-460 XxivBidirectional Group Tree Building IPC-474 XxvEnabling PGM Host IPC-495 XxviRgmp Overview XxviiXxviii About Cisco IOS Software Documentation Documentation ObjectivesAudience Documentation OrganizationShows the Cisco IOS software documentation modules XxxXxxi Module DC/DR Module TC/TRXxxii Master IndexesSupporting Documents and Resources New and Changed Information Document ConventionsConvention Description XxxiiiXxxiv Obtaining Documentation Documentation FeedbackWorld Wide Web Documentation CD-ROMContacting TAC by Using the Cisco TAC Website Obtaining Technical AssistanceCisco.com Technical Assistance CenterContacting TAC by Telephone XxxviiXxxviii Xxxix Using Cisco IOS SoftwareUnderstanding Command Modes Getting Help Mode Access Method Prompt Exit MethodCommand Purpose Xli Example How to Find Command OptionsCommand Comment Xlii Using the no and default Forms of Commands XliiiSaving Configuration Changes Filtering Output from the show and more CommandsBuilding configuration XlivUsing Feature Navigator Using Software Release NotesIdentifying Supported Platforms XlvXlvi IP Addressing and Services IP OverviewInterior and Exterior Gateway Protocols IP Routing ProtocolsDetermining a Routing Process Exterior Gateway Protocols Multiple Routing ProtocolsInterior Gateway Protocols IP Multicast IP Addressing and Services Page Assigning IP Addresses to Network Interfaces Configuring IP AddressingIP Addressing Task List Sets a primary IP address for an interface Routerconfig-if# ip address ip-address maskClass Address or Range Status Assigns multiple IP addresses to network interfaces Assigning Multiple IP Addresses to Network InterfacesEnabling Use of Subnet Zero Disabling Classless Routing Behavior IPC-10Enabling IP Processing on a Serial Interface IPC-11Configuring Address Resolution Methods Establishing Address ResolutionRouterconfig-if# ip unnumbered type number Assigning an explicit IP address to the interfaceDefining a Static ARP Cache Globally associates an IP address with a media hardwareAddress in the ARP cache Were the owner of the specified IP addressSetting ARP Encapsulations Enables proxy ARP on the interfaceEnabling Proxy ARP IPC-14IPC-15 Configuring Local-Area MobilityMapping Host Names to IP Addresses IPC-16 Assigning Host Names to IP AddressesSpecifying the Domain Name Using the DNS to Discover ISO Clns Addresses Specifying a Name ServerEnabling the DNS IPC-17Configuring HP Probe Proxy Name Requests Configuring the Next Hop Resolution ProtocolCisco Implementation of Nhrp IPC-18IPC-19 Destination hostIPC-20 Nhrp Configuration Task ListProtocol Operation IPC-21 Statically Configuring a Next Hop ServerEnabling Nhrp on an Interface IPC-22 Configuring Nhrp AuthenticationControlling the Triggering of Nhrp Routerconfig-if# ip nhrp use usage-count Triggering Nhrp Based on Traffic ThresholdsIs attempted IPC-23IPC-24 Controlling the Nhrp Packet Rate IPC-25IPC-26 Suppressing Forward and Reverse Record OptionsSpecifying the Nhrp Responder Address Configuring a GRE Tunnel for Multipoint Operation Configuring Nhrp Server-Only ModeEnabling IP Routing IPC-27Routing Assistance When IP Routing Is Disabled Default GatewayProxy ARP IPC-28Icmp Router Discovery Protocol IPC-29Configuring a Routing Process Enabling IP BridgingEnabling Integrated Routing and Bridging IPC-30Configuring Broadcast Packet Handling IPC-31Forwarding UDP broadcast packets, such as Bootp Routerconfig-if# ip helper-address addressForwarding UDP Broadcast Packets and Protocols On an interfaceEstablishing an IP Broadcast Address Flooding IP BroadcastsEstablishes a different broadcast address other than Bit Address nethostSpeeding Up Flooding of UDP Datagrams IPC-34Configuring Network Address Translation NAT ApplicationsBenefits IPC-35IPC-36 NAT Configuration Task ListNAT Terminology Translating Inside Source Addresses IPC-37IPC-38 Configuring Static TranslationConfiguring Dynamic Translation with an Access List IPC-39 Configuring Dynamic Translation with a Route MapOverloading an Inside Global Address Defines a standard access list IPC-40Translating Overlapping Addresses IPC-41IPC-42 NAT Translating Overlapping AddressesIPC-43 Configuring Dynamic TranslationProviding TCP Load Distribution 1.127 IPC-44Changing Translation Timeouts Changes the timeout value for dynamic addressTranslations that do not use overloading IPC-45IPC-46 Monitoring and Maintaining NATDeploying NAT Between an IP Phone and Cisco CallManager Monitoring and Maintaining IP Addressing Clearing Caches, Tables, and DatabasesSpecifying the Format of Network Masks IPC-47Displaying System and Network Statistics IPC-48IPC-49 IP Addressing ExamplesMonitoring and Maintaining Nhrp Serial Interfaces Configuration Example Router B ConfigurationRouter C Configuration Creating a Network from Separated Subnets ExampleIP Domains Example Dynamic Lookup ExampleHP Hosts on a Network Segment Example Logical Nbma ExampleIPC-52 Two Logical Nbma Networks over One Physical Nbma NetworkNhrp over ATM Example IPC-53Router a Configuration IPC-54Changing the Rate for Triggering SVCs Example IPC-55Interface ATM0/0.1 multipoint IPC-56Interface Fddi1/0/0 Applying Nhrp Rates to Specific Destinations Example IPC-57Ip nhrp network-id Ip nhrp trigger-svc 100 Interface Fddi4/0/0Nhrp on a Multipoint Tunnel Example IPC-58Router D Configuration Broadcasting ExamplesFlooded Broadcast Example IPC-59Helper Addresses Example Flooding of IP Broadcasts ExampleIPC-60 Interface serialNAT Configuration Examples Following example shows the configurationFollowing sections show NAT configuration examples Dynamic Inside Source Translation ExampleIPC-62 Overloading Inside Global Addresses ExampleTranslating Overlapping Address Example IPC-63 Ping Command ExampleTCP Load Distribution Example IPC-64 IPC-65 Configuring DhcpDhcp Server Overview IPC-66 Dhcp Request for an IP Address from a Dhcp ServerIPC-67 Dhcp Client OverviewDhcp Relay Agent Overview Dhcp Configuration Task List Enabling the Cisco IOS Dhcp Server and Relay Agent FeaturesFeatures Routerconfig# service dhcpConfiguring a Dhcp Address Pool Excluding IP AddressesDatabase transfers Dhcp clientsIPC-70 Configuring the Dhcp Address Pool Subnet and MaskConfiguring the Domain Name for the Client Configuring Manual Bindings Configuring the NetBIOS Node Type for the ClientConfiguring the Default Router for the Client Configuring the Address Lease TimeCommand IPC-72Configuring a Dhcp Server Boot File Configuring the Number of Ping PacketsConfiguring the Timeout Value for Ping Packets Enabling the Cisco IOS Dhcp Client on Ethernet InterfacesEight IP addresses in one command line Exits Dhcp pool configuration modeImport Dhcp option parameters into the Dhcp server database IPC-74Configuring a Relay Agent Information Reforwarding Policy Enabling the Dhcp Smart-Relay FeatureMonitoring and Maintaining the Dhcp Server IPC-75Configuration Examples IPC-76Dhcp Database Agent Configuration Example Dhcp Address Pool Configuration ExampleDefault-router 172.16.1.100 172.16.1.101 lease Default-router 172.16.2.100 172.16.2.101 leaseManual Bindings Configuration Example On the Dhcp Server, the configuration is as followsCisco IOS Dhcp Client Example IPC-78Dhcp Server Options Import and Autoconfiguration Example Central RouterRemote Router IPC-79IPC-80 Configuring IP Services IP Services Task ListManaging IP Connections IPC-81Routerconfig-if# ip unreachables Enabling Icmp Protocol Unreachable MessagesEnabling Icmp Redirect Messages MessagesEnables the sending of Icmp mask reply messages Enabling Icmp Mask Reply MessagesUnderstanding Path MTU Discovery IPC-83Setting the MTU Packet Size Routerconfig-if# ip mtu bytesEnabling IP Source Routing Sets the IP MTU packet size for an interfaceConfiguring Simplex Ethernet Interfaces Configuring a DRP Server AgentAssigns a transmit interface to a receive-only interface IPC-85Configuring Authentication of DRP Queries and Responses Enabling the DRP Server AgentLimiting the Source of DRP Queries IPC-86Filtering IP Packets Using Access Lists IPC-87Creating Standard and Extended Access Lists Using Numbers IPC-88IPC-89 IPC-90 Creating Standard and Extended Access Lists Using Names IPC-91IPC-92 Specifying IP Extended Access Lists with Fragment Control IPC-93If the Access-List Entry has Then IPC-94Benefits of Fragment Control in an IP Extended Access List IPC-95IPC-96 Enabling Turbo Access Control ListsConfiguring Turbo ACLs IPC-97 Applying Time Ranges to Access ListsVerifying Turbo ACLs IPC-98 Including Comments About Entries in Access ListsApplying Access Lists IPC-99 Controlling Access to a Line or InterfaceControlling Dialer Functions Configuring the Hot Standby Router Protocol IPC-100Enables the Hsrp Routerconfig-if# standby group-number ipEnabling Hsrp IPC-101IPC-102 Configuring Hsrp Group AttributesChanging the Hsrp MAC Refresh Interval IPC-103 Enabling Hsrp MIB TrapsEnabling Hsrp Support for Mpls VPNs IPC-104 Defining VPNsEnabling Hsrp Enabling Hsrp Support for Icmp Redirect Messages Verifying Hsrp Support for Mpls VPNsRedirects to Active Hsrp Routers IPC-105IPC-106 Redirects to Passive Hsrp Routers Redirects to Non-HSRP RoutersPassive Hsrp Router Advertisements Redirects Not SentIPC-108 Configuring IP AccountingConfiguring Hsrp Support for Icmp Redirect Messages Configuring IP MAC Accounting IPC-109Configuring TCP Performance Parameters Configuring IP Precedence AccountingConfigures IP accounting based on the precedence IPC-110Enables TCP header compression Routerconfig-if# ip tcpCompressing TCP Packet Headers Expressing TCP Header CompressionSetting the TCP Connection Attempt Time Enabling TCP Path MTU DiscoveryChanging the Number of TCP Header Compression Connections Can exist on an interfaceIPC-113 Enables Path MTU DiscoveryEnabling TCP Selective Acknowledgment Setting the TCP Maximum Read Size Setting the TCP Window SizeEnabling TCP Time Stamp IPC-114Configuring IP over WANs Setting the TCP Outgoing Queue SizeSets the TCP outgoing queue size IPC-115IPC-116 Mnlb Forwarding Agent Configuration Task ListEnabling CEF IPC-117 Enabling NetFlow SwitchingEnabling IP Multicast Routing IPC-118 Configuring the Router as a Forwarding AgentMonitoring and Maintaining the IP Network IPC-119 Clearing the Access List CountersMonitoring and Maintaining the DRP Server Agent IPC-120 IP Services Configuration ExamplesMonitoring the Mnlb Forwarding Agent Icmp Services Example Router 1 ConfigurationRouter 2 Configuration Simplex Ethernet Interfaces ExampleNumbered Access List Examples Ip access-group 2 outDRP Server Agent Example IPC-122IPC-123 Turbo Access Control List ExampleImplicit Masks in Access Lists Examples Named Access List Example Extended Access List ExamplesIPC-124 Interface Ethernet0/5IP Extended Access List with Fragment Control Example Time Range Applied to an IP Access List ExampleCommented IP Access List Entry Examples Interface ethernet Ip access-group strictIP Accounting Example Hsrp Load Sharing ExampleIPC-126 Deny tcp 171.69.0.0 0.0.255.255 any eq telnetNo Switch or Learning Bridge Present Example Switch or Learning Bridge Present ExampleHsrp MAC Refresh Interval Examples IPC-127Primary Router Configuration Backup Router ConfigurationHsrp MIB Trap Example Hsrp Support for Mpls VPNs ExampleRouter PE1 Configuration Router PE2 ConfigurationHsrp Support for Icmp Redirect Messages Example IPC-129IPC-130 Forwarding Agent Configuration for FA2 ExampleMnlb Forwarding Agent Examples Services Manager Configuration for SM Example IPC-131Failover ip address 0.0.0.0 failover Password cisco No snmp-server location Casa service-manager portIPC-132 Ip address 172.26.56.19Configuring Server Load Balancing IPC-133IOS SLB Functions and Capabilities IPC-134Weighted Round Robin Weighted Least ConnectionsAlgorithms for Server Load Balancing IPC-135Content Flow Monitor Support Port-Bound ServersClient-Assigned Load Balancing Sticky ConnectionsDelayed Removal of TCP Connection Context TCP Session ReassignmentAutomatic Server Failure Detection Automatic UnfailDynamic Feedback Protocol for IOS SLB Alternate IP AddressesTransparent Web Cache Balancing IPC-138IPC-139 Redundancy Enhancement-Stateless BackupRestrictions IOS SLB Configuration Task List IPC-140IPC-141 Specifying a Server FarmSpecifying a Load-Balancing Algorithm Configuring Real Server Attributes Specifying a Bind IDSpecifying a Real Server IPC-142Enabling the Real Server for Service Configuring Virtual Server AttributesSpecifying a Virtual Server Associating a Virtual Server with a Server FarmAdjusting Virtual Server Values Enabling the Virtual Server for ServicePreventing Advertisement of Virtual Server Address IPC-144Configuring IOS SLB Dynamic Feedback Protocol Configuring NATImplementing IOS SLB Stateless Backup How IOS SLB Stateless Backup WorksConfiguring IOS SLB Stateless Backup IPC-146IPC-147 Verifying the IOS SLB Stateless Backup ConfigurationCustomizing Group Attributes Verifying IOS SLB Installation Verifying IOS SLBIPC-148 10.10.10.1223IPC-149 Verifying Server Failure DetectionVerify that the the connection counts are increasing IPC-150 Troubleshooting IOS SLBQuestion Answer Monitoring and Maintaining IOS SLB IPC-151IOS SLB Network Configuration Example IPC-152NAT Configuration Example IPC-153IPC-154 Configuration statements for Switch B are as followsConfiguration statements for Switch C are as follows Hsrp Configuration Example IPC-155IPC-156 Configuration for Device a is as followsConfiguration for Device B is as follows Interface FastEthernet Ip address 2.0.0.1 IOS SLB Stateless Backup Configuration ExampleIPC-157 IPC-158 Configuring Mobile IP Why is Mobile IP Needed?Mobile IP Overview IPC-159Mobile IP Components IPC-160IPC-161 How Mobile IP WorksAgent Discovery IPC-162 RegistrationRouting Mobile IP Security IPC-163Storing Security Associations IPC-164Home Agent Redundancy Storing SAs on AAAHsrp Groups How HA Redundancy WorksPrerequisites IPC-166IPC-167 Mobile IP Configuration Task ListEnabling Home Agent Services IPC-168 Enabling Foreign Agent ServicesConfiguring AAA in the Mobile IP Environment Configuring Radius in the Mobile IP Environment Configuring TACACS+ in the Mobile IP EnvironmentVerifying Setup IPC-169Mobile IP HA Redundancy Configuration Task List Monitoring and Maintaining Mobile IPShutting Down Mobile IP IPC-170Enabling Mobile IP IPC-171Enabling HA Redundancy for a Physical Network IPC-172IPC-173 Defines the virtual networks. Repeat this step for Each virtual network. If the mobile node and homeAgent are on the same subnet, use the address Address optionVerifying HA Redundancy IPC-175Mobile IP Configuration Examples Home Agent Configuration ExampleMonitoring and Maintaining HA Redundancy IPC-176Home Agent Using AAA Server Example IPC-177Foreign Agent Configuration Example Mobile IP HA Redundancy Configuration ExamplesHome Agent Address Configuration Mobile Node Home Physical NetworkIPC-179 Repeat this command for each virtual HA Redundancy for Physical Networks ExampleNetworks IPC-180HA1 Configuration IPC-181HA2 Configuration IPC-182Mobile Node and Home Agent on Same Subnet IPC-183IPC-184 Interface loopback0 Ip address 10.0.0.10Ip mobile Ip mobile home-agent standby SanJoseHANet2 virtual-networkIPC-185 IPC-186 IPC-187 Interface ethernet0 Ip address 1.0.0.2IPC-188 Interface e0IPC-189 IPC-190 IPC-191 IPC-192 IP Routing Protocols Page Configuring On-Demand Routing IPC-195IPC-196 On-Demand Routing Configuration Task ListEnabling ODR Reconfiguring CDP or ODR Timers Filtering ODR InformationFilters ODR information on the hub RouterUsing ODR with Dialer Mappings IPC-198Configuring Routing Information Protocol IPC-199IPC-200 RIP Configuration Task ListEnabling RIP Allowing Unicast Updates for RIP Adjusting TimersApplying Offsets to Routing Metrics IPC-201Specifying a RIP Version IPC-202IPC-203 Enabling RIP AuthenticationRIP Route Summarization IPC-204 Configuring Route Summarization on an Interface Restrictions to RIP Route SummarizationVerifying IP Route Summarization IPC-205Disables automatic summarization Running Igrp and RIP ConcurrentlyDisabling Automatic Route Summarization IPC-206Command Purposes Disabling the Validation of Source IP AddressesEnabling or Disabling Split Horizon IPC-207IPC-208 Configuring Interpacket DelayConnecting RIP to a WAN RIP Configuration Examples Example 1 Correct ConfigurationRoute Summarization Examples IPC-209Example 2 Incorrect Configuration Two examples of configuring split horizon are providedSplit Horizon Examples ExampleConfiguration for Router a Configuration for Router BConfiguration for Router C IPC-211Address Family Timers Example IPC-212IPC-213 Configuring IgrpCisco Igrp Implementation IPC-214 Igrp Configuration Task ListIgrp Updates IPC-215 Allowing Unicast Updates for IgrpCreating the Igrp Routing Process Routerconfig-router# variance multiplier Defining Unequal-Cost Load BalancingControlling Traffic Distribution Defines the variance associated with a particular pathAdjusting the Igrp Metric Weights Adjusts the Igrp metricRouterconfig-router# traffic-share balanced Distribute traffic proportionately to the ratios of metricsDisabling Holddown Enforcing a Maximum Network DiameterValidating Source IP Addresses IPC-218Igrp Configuration Examples IPC-219Igrp Feasible Successor Relationship Example IPC-220Router Configuration a Router Configuration BRouter Configuration C IPC-221IPC-222 IPC-223 Configuring OspfCisco Ospf Implementation Ospf Configuration Task List IPC-224IPC-225 Configuring Ospf Interface ParametersEnabling Ospf Configuring Ospf over Different Physical Networks Configuring Your Ospf Network TypeSpecifies the authentication type for an interface Network segmentIPC-227 Configuring Point-to-Multipoint, Broadcast NetworksConfiguring Ospf for Nonbroadcast Networks IPC-228 Configuring Ospf Area ParametersNonbroadcast media Configuring Ospf Nssa IPC-229IPC-230 Configuring Route Summarization Between Ospf AreasImplementation Considerations IPC-231 Generating a Default RouteCreating Virtual Links Configuring Lookup of DNS Names Controlling Default MetricsForcing the Router ID Choice with a Loopback Interface IPC-232Changing the Ospf Administrative Distances Configuring Ospf on Simplex Ethernet InterfacesConfiguring Route Calculation Timers IPC-233Configuring Ospf over On-Demand Circuits Enables Ospf operationConfigures Ospf on an on-demand circuit Routerconfig# interface interface-typeSends syslog message when an Ospf neighbor goes up or down Routerconfig-router# log-adjacency-changesLogging Neighbors Going Up or Down Changing the LSA Group PacingIPC-236 LSA Group Pacing With Multiple TimersOriginal LSA Behavior Routerconfig-router# timers lsa-group-pacing Blocking Ospf LSA FloodingChanges the group pacing of LSAs IPC-237Routerconfig-router# ignore lsa mospf Reducing LSA FloodingIgnoring Mospf LSA Packets Mospf LSA packetsDisplaying Ospf Update Packet Pacing IPC-239Monitoring and Maintaining Ospf IPC-240IPC-241 Ospf Configuration ExamplesOspf Point-to-Multipoint Example Mollie Configuration Neon ConfigurationPlatty Configuration IPC-242Jelly Configuration Route information in the first configuration is as followsOspf Point-to-Multipoint, Broadcast Example IPC-243IPC-244 Ospf Point-to-Multipoint, Nonbroadcast ExampleVariable-Length Subnet Masks Example IPC-245 Basic Ospf Configuration ExamplesOspf Routing and Route Redistribution Examples Complex Internal Router, ABR, and ASBRs Example IPC-246This configuration, five routers are configured with Ospf IPC-247IPC-248 Neighbor 11.0.0.6 remote-as Complex Ospf Configuration for ABR ExamplesIPC-249 Following configuration Ospf is on network Following configuration Igrp autonomous system 200 is onRoute Map Examples IPC-250IPC-251 Router rip Redistribute ospf 109 route-mapRouter bgp Redistribute ospf 109 route-map Router isisChanging Ospf Administrative Distance Example IPC-252Ospf over On-Demand Routing Example IPC-253IPC-254 Dialer-list 1 protocol ip permitLSA Group Pacing Example Block LSA Flooding ExampleIgnore Mospf LSA Packets Example IPC-255IPC-256 IPC-257 Configuring EigrpCisco Eigrp Implementation IPC-258 Eigrp Configuration Task List Enables an Eigrp routing process in globalEnabling Eigrp Associates networks with an Eigrp routing processConfiguring the Percentage of Link Bandwidth Used Adjusting the Eigrp Metric WeightsMaking the Transition from Igrp to Eigrp Logging Eigrp Neighbor Adjacency ChangesMismatched K Values IPC-261Disabling Route Summarization Goodbye MessageIPC-262 Value mismatchConfiguring Summary Aggregate Addresses Configuring Floating Summary RoutesConfigures a summary aggregate address IPC-263IPC-264 10.1.1.0/24 0.0/0 Router-A Router-B Router-CConfiguring Eigrp Route Authentication Configure an interface type and enter interfaceEnables MD5 authentication in Eigrp packets IPC-265Configuring Eigrp Protocol-Independent Parameters IPC-266Configures the hello interval for an Eigrp routing Configures the hold time for an Eigrp routing processDisabling Split Horizon ProcessConfiguring Eigrp Stub Routing IPC-268Dual-Homed Remote Topology IPC-269IPC-270 IPC-271 Eigrp Stub Routing Configuration Task List Configuring Eigrp Stub RoutingMonitoring and Maintaining Eigrp Verifying Eigrp Stub RoutingIPC-273 Eigrp Configuration ExamplesRoute Summarization Example IPC-274 Route Authentication Example IPC-275Infinite Exit Key Key-stringEigrp stub connected static Stub Routing ExampleIPC-276 Configuring Integrated IS-IS IS-IS Configuration Task ListEnabling IS-IS and Assigning Areas IPC-277Routerconfig# router isis area tag IPC-278IPC-279 IS-IS Interface Parameters Configuration Task ListEnabling IP Routing for an Area on an Interface Configuring IS-IS Link-State Metrics Setting the Advertised Hello IntervalSetting the Advertised Csnp Interval IPC-280Setting the Retransmission Interval Setting the LSP Transmissions IntervalSetting the Retransmission Throttle Interval IPC-281Setting the Hello Multiplier Assigning a Password for an InterfaceSpecifying Designated Router Election Specifying the Interface Circuit TypeConfiguring Mesh Groups Limiting LSP FloodingBlocking Flooding on Specific Interfaces IPC-283Miscellaneous IS-IS Parameters Configuration Task List Generating a Default RouteForces a default route into the IS-IS routing domain Specifying the System TypeConfiguring IS-IS Authentication Passwords Setting the Overload BitSummarizing Address Ranges IPC-285Tuning LSP Interval and Lifetime Routerconfig-router# set-overload-bitChanging the Routing Level for an Area Sets the overload bitRouter Config-router# max-lsp-lifetime Partial Route Computation PRCSets the LSP refresh interval Router’s database without being refreshedModifying the Output of show Commands IPC-288IS-IS Configuration Examples Enabling IS-IS Configuration ExampleMonitoring IS-IS IPC-289Multiarea IS-IS Configuration for Clns Network Example IPC-290Router isis BB IS-IS Throttle Timers ExampleIPC-291 IPC-292 IPC-293 Configuring BGPCisco BGP Implementation How BGP Selects Paths IPC-294IPC-295 Basic BGP Configuration Task ListBGP Multipath Support Advanced BGP Configuration Task List IPC-296Configuring Basic BGP Features Configuring BGP NeighborsEnabling BGP Routing IPC-297Type of Reset Advantages Disadvantages Capability Policy updates without modificationManaging Routing Policy Changes Is memory-intensiveIPC-299 Resetting a Router Using BGP Dynamic Inbound Soft ResetKeyword to specify that all connections be reset Resetting a Router Using BGP Outbound Soft Reset IPC-300Verifying BGP Soft Reset IPC-301Configuring BGP Interactions with IGPs Disables synchronization between BGP and an IGPTimer Starts Wakeups IPC-302IPC-303 Configuring BGP WeightsDisabling Autonomous System Path Comparison IPC-304 Configuring BGP Route Filtering by NeighborConfiguring BGP Filtering Using Prefix Lists How the System Filters Traffic by Prefix List Creating a Prefix ListArgument Removes a prefix list with the name specified for list-nameConfiguring a Prefix List Entry To the entryIPC-306 Len ge-value = le-value =IPC-307 Deleting a Prefix List or Prefix List EntriesDisplaying Prefix Entries Configuring BGP Path Filtering by Neighbor Disabling Next Hop Processing on BGP UpdatesClearing the Hit Count Table of Prefix List Entries IPC-308Disabling Next Hop Processing Using a Specific Address Disabling Next Hop Processing Using a Route MapConfiguring BGP Next Hop Propagation IPC-309IPC-310 Configuring the BGP VersionConfiguring the MED Metric Configuring Advanced BGP Features Using Route Maps to Modify UpdatesResetting eBGP Connections Immediately upon Link Failure Configuring Aggregate AddressesIPC-312 Configuring BGP Community FilteringDisabling Automatic Summarization of Network Numbers IPC-313 IPC-314 Configuring BGP Conditional AdvertisementSpecifying the Format for the Community BGP Conditional Advertisement Configuration Task List Conditional Advertisement of a Set of RoutesVerifying BGP Conditional Advertisement IPC-315Configuring a Routing Domain Confederation BGP Conditional Advertisement Troubleshooting TipsConfigures a BGP confederation IPC-316Configuring a Route Reflector Specifies the autonomous systems that belong toConfederation IPC-317IPC-318 Simple BGP Model with a Route ReflectorConfigures the local router as a BGP route reflector Configures the cluster IDRouterconfig-router# bgp cluster-id cluster-id Specified neighbor as a clientConfiguring BGP Peer Groups Routerconfig-router# neighbor peer-group-nameCreating the Peer Group Creates a BGP peer groupAssigning Options to the Peer Group IPC-321IPC-322 Invokes MD5 authentication on a TCP connection to a BGPConfigures the software to start storing received updates Old Behavior New BehaviorIPC-323 000307 %TCP-6-BADAUTH No MD5 digest from 10.0.0.2179 toIPC-324 Disabling a Peer or Peer GroupMaking Neighbors Members of the Peer Group Setting Administrative Distance Adjusting BGP TimersIndicating Backdoor Routes Modifying Parameters While Updating the IP Routing TableIPC-326 Changing the Default Local Preference ValueRedistributing Network Selecting Path Based on MEDs from Other Autonomous Systems IPC-327IPC-328 Configuring Route DampeningMinimizing Flapping IPC-329 Understanding Route Dampening TermsEnabling Route Dampening Changes the default values of route dampening factors Routerconfig# bgp dampening half-life reuseMonitoring and Maintaining BGP Route Dampening IPC-330Monitoring and Maintaining BGP Clears route dampening information and unsuppressesSuppressed routes IPC-331IPC-332 BGP Configuration ExamplesLogging Changes in Neighbor Status BGP Route Map Examples IPC-333Router bgp Neighbor 1.1.1.1 route-map freddy out Router bgp Redistribute igrp 109 route-map igrp2bgpSet local-preference 25 set metric Set weight Set automatic-tag Ip as-path access-list 1 permitAccess-list 2 permit 0.0.0.0 IPC-334Router bgp Neighbor 1.1.1.1 remote-as IPC-335Router bgp Neighbor 1.1.1.2 remote-as BGP Neighbor Configuration Examples IPC-336BGP Prefix List Filtering Examples IPC-337Ip prefix-list abc deny 0.0.0.0/0 Ip prefix-list abc permit 35.0.0.0/8IPC-338 BGP Soft Reset Examples Dynamic Inbound Soft Reset ExampleInbound Soft Reset Using Stored Information Example Added or Deleted Prefix List Entries ExamplesIPC-340 BGP Synchronization ExamplesBGP Path Filtering by Neighbor Examples IPC-341 BGP Aggregate Route ExamplesBGP Community with Route Maps Examples Ip community-list 3 permit internet IPC-342Route-map bgp Route-map set-community permit 10 set community no-export BGP Conditional Advertisement Configuration ExamplesIPC-343 BGP Confederation Examples IPC-344BGP Peer Group Examples IBGP Peer Group ExampleEBGP Peer Group Example IPC-345IPC-346 TCP MD5 Authentication for BGP ExamplesRouter bgp Neighbor 10.108.1.1 password bla4u00=2nkq Configuring Multiprotocol BGP Extensions for IP Multicast IPC-347IPC-348 Incongruent Unicast and Multicast RoutesMultiprotocol BGP Configuration Task List IPC-349IPC-350 Configuring a Multiprotocol BGP PeerUnderstanding Nlri Keywords and Address Families Configuring a Multiprotocol BGP Peer Group IPC-351Advertising Routes into Multiprotocol BGP IPC-352IPC-353 Configuring Route Maps for Multiprotocol BGP PrefixesRedistributing Prefixes into Multiprotocol BGP IPC-354 Configuring Dvmrp Interoperability with Multiprotocol BGPRedistributing Multiprotocol BGP Routes into Dvmrp Redistributing Dvmrp Routes into Multiprotocol BGP Redistributes multiprotocol BGP routes into Dvmrp with aRedistributed Redistributes Dvmrp routes into multiprotocol BGPIPC-356 Configuring a Multiprotocol BGP Route ReflectorConfiguring Aggregate Multiprotocol BGP Addresses Verifying Multiprotocol BGP Configuration and Operation Configures an aggregate address with variousOptions IPC-357IPC-358 Multiprotocol BGP Configuration ExamplesDatabase information Multiprotocol BGP Peer Examples Multiprotocol BGP Peer Group ExamplesIPC-359 Neighbor 10.1.1.1 activateMultiprotocol BGP Network Advertisement Examples Multiprotocol BGP Route Map ExamplesMultiprotocol BGP Route Redistribute Examples IPC-360Multiprotocol BGP Route Reflector Examples Aggregate Multiprotocol BGP Address ExamplesIPC-361 Aggregate-address 172.16.0.0 255.0.0.0 as-setIPC-362 IPC-363 Configuring IP Routing Protocol-Independent FeaturesProtocol-Independent Feature Task List Using Variable-Length Subnet Masks Configuring Static RoutesRoute Source Default Distance IPC-364IPC-365 Specifying Default RoutesSpecifying a Default Network Configuring Multi-Interface Load Splitting Changing the Maximum Number of PathsUnderstanding Gateway of Last Resort IPC-366Redistributing Routing Information IPC-367IPC-368 Understanding Supported Metric Translations IPC-369Preventing Routing Updates Through an Interface Suppresses the sending of routing updates throughFiltering Routing Information Specified interfaceConfiguring Default Passive Interfaces IPC-371Controlling the Advertising of Routes in Routing Updates Controlling the Processing of Routing UpdatesFiltering Sources of Routing Information IPC-372Defines a route map to control where packets are output Enabling Policy Routing PBRIdentifies the route map to use for policy routing IPC-373IPC-374 IPC-375 Preverifying Next-Hop AvailabilityNumber Name IPC-376 Enabling Fast-Switched Policy RoutingDisplaying Route-Map Policy Information IPC-377 Managing Authentication KeysEnabling Local Policy Routing Clearing Routes from the IP Routing Table IPC-378Displays authentication key information Displays all route maps configured or only the oneVariable-Length Subnet Mask Example SpecifiedAdministrative Distance Examples Overriding Static Routes with Dynamic Protocols ExampleIPC-380 Ip route 10.0.0.0 255.0.0.0 172.18.3.4Access-list 3 permit Static Routing Redistribution ExampleIgrp Redistribution Example IPC-381IPC-382 RIP and Igrp Redistribution ExampleEigrp Redistribution Examples Configuration for router R1 router bgp Network RIP and Eigrp Redistribution ExamplesSimple Redistribution Example Complex Redistribution ExampleIPC-384 Redistribute bgpInternal Router, ABR, and ASBRs Configuration Example IPC-385IPC-386 Example Ospf Autonomous System Network MapIPC-387 Neighbor 172.16.1.6 remote-as Complex Ospf Configuration ExampleIPC-388 Following configuration, Ospf is on network Following configuration Igrp autonomous system 1 is onIPC-389 Area 10.0.0.0 range 10.0.0.0IPC-390 Default Metric Values Redistribution ExamplePolicy Routing Route Map Examples IPC-391 Passive-interface ethernet 1 neighbor Passive Interface ExamplesIPC-392 Default Passive Interface Example Policy Routing ExampleIPC-393 No ip directed-broadcast Interface SerialFollowing example configures a key chain named trees Set default interface null0Ip rip authentication key-chain trees media-type 10BaseT Key Management ExamplesIPC-395 Ip rip receive version 1 no keepaliveIPC-396 IP Multicast Page Configuring IP Multicast Routing IPC-399Cisco IP Multicast Routing Implementation IPC-400IPC-401 Draft-ietf-pim-v2-dm-03.txt, PIM Version 2 Dense ModeIgmp Versions IPC-402 Basic IP Multicast Routing Configuration Task ListAdvanced IP Multicast Routing Configuration Task List Enabling Dense Mode Enabling IP Multicast RoutingEnabling PIM on an Interface IPC-403Enabling Sparse Mode Enabling Sparse-Dense ModeEnables PIM dense mode on the interface Enables PIM sparse mode on the interfaceConfiguring PIM Dense Mode State Refresh IPC-405Configuring Auto-RP Configuring a Rendezvous PointConfigures the address of a PIM RP IPC-406Setting Up Auto-RP in a New Internetwork Adding Auto-RP to an Existing Sparse Mode CloudChoosing a Default RP Announcing the RP and the Group Range It ServesFiltering Incoming RP Announcement Messages Verifying the Group-to-RP MappingStarting to Use IP Multicast Preventing Join Messages to False RPsIgmp Features Configuration Task List Configuring a Router to Be a Member of a GroupControlling Access to IP Multicast Groups IPC-409Changing the Igmp Version Routers That Run Igmp VersionSelects the Igmp version that the router uses Igmp host-query messagesIPC-411 Configuring Igmp VersionSets the Igmp query timeout Restrictions IPC-412Changing the Igmp Query Timeout Configuring the Router as a Statically Connected MemberRouterconfig-if# ip igmp Changing the Maximum Query Response TimeConfiguring Igmp Leave Latency Configures the interval at which the router sends IgmpConfigures the number of times that the router sends Igmp Group-specific or group-source-specific with IGMPv3 queryConfiguring the TTL Threshold Disabling Fast Switching of IP MulticastSAP Listener Support Configuration Task List Enabling SAP Listener SupportRouterconfig-if# ip sap listen Limiting How Long a SAP Cache Entry ExistsAnnouncements IPC-416IPC-417 Configuring PIM VersionFunctional address IPC-418 PIM Version 2 Configuration Task ListPrerequisites Configuring PIM Version 2 Only Configuring PIM Sparse-Dense ModeDefining a PIM Sparse Mode Domain Border Interface Specifying the PIM VersionIPC-420 Configuring Candidate BSRsConfiguring Candidate RPs Deciding When to Configure a BSR Configures the router to be a candidate RPMaking the Transition to PIM Version IPC-421Advanced PIM Features Configuration Task List Dense ModeSparse Mode Monitoring the RP Mapping InformationIPC-423 Shared Tree and Source Tree Shortest-Path TreeDelaying the Use of PIM Shortest-Path Tree Understanding Reverse Path ForwardingShortest-path tree IPC-424Assigning an RP to Multicast Groups Increasing Control over RPsModifying the PIM Router Query Message Interval IPC-425IPC-426 Understanding the PIM Registering ProcessPIM Version 1 Compatibility Configuring the IP Source Address of Register Messages Limiting the Rate of PIM Register MessagesEnabling Proxy Registering IPC-427Enabling PIM Nonbroadcast Multiaccess Mode Enables PIM Nbma modeRouterconfig-if# ip pim nbma-mode IPC-428Configuring an IP Multicast Static Route IPC-429Configuring RTP Header Compression Configures an IP multicast static routeControlling the Transmission Rate to a Multicast Group Controls transmission rate to a multicast groupIPC-431 RTP Header CompressionIPC-432 Enabling RTP Header Compression on a Serial InterfaceChanging the Number of Header Compression Connections Enabling Express RTP Header Compression IPC-433IPC-434 IPC-435 IPC-436 Enabling IP Multicast over ATM Point-to-Multipoint VCsLimiting the Number of VCs Idling Policy How the Idling Policy WorksKeeping VCs from Idling IdledIPC-438 Configuring an IP Multicast BoundaryConfiguring an Intermediate IP Multicast Helper Storing IP Multicast Headers IPC-439Configuring Stub IP Multicast Routing Use the show ip mpacket Exec command to display the bufferEnables Cgmp Enabling CgmpIPC-441 Specified access listMessages to the specified IP address on a central router Enabling Native Load Splitting Enabling Load Splitting Across TunnelsEqual-cost paths IPC-442IPC-443 Configuring the Access RouterConfiguring the Router at the Opposite End of the Tunnel Configuring Both Routers to RPF IPC-444Verifying the Load Splitting IPC-445Tunnel0 Serial1IPC-446 Using IP Multicast Heartbeat IPC-447IP Multicast Configuration Examples PIM Dense Mode ExamplePIM Sparse Mode Example IPC-448PIM Dense Mode State Refresh Example BSR Configuration ExamplePIM Version 2 Examples This section provides examples in the following sectionsBorder Router Configuration Example RFC 2362 Interoperable Candidate RP ExampleIPC-450 Ip pim sparse-dense-mode Router ospfRTP Header Compression Examples IPC-451IPC-452 No keepalive ClockrateNo ip route-cache Interface Ethernet2/1 Interface Serial4/0Password lab login No scheduler max-task-time end IPC-453Version Ip route-cacheIP Multicast over ATM Point-to-Multipoint VC Example IPC-454Administratively Scoped Boundary Example IP Multicast Helper ExampleIPC-455 Atm pvc 2 0 16 ilmiRouter A-First Hop Router Configuration Router C-Last Hop Router ConfigurationStub IP Multicast Example IPC-456IPC-457 IP Multicast Load Splitting Across Equal-Cost PathsIP Multicast Heartbeat Example IPC-458Ip address 100.1.3.3 255.255.255.0 bandwidth Clock rate Ip multicast heartbeat ethernet0 224.1.1.1 1 1IPC-459 Configuring Source Specific MulticastSSM Components Overview How SSM Differs from Internet Standard Multicast SSM IP Address RangeSSM Operations IPC-460IPC-461 IGMPv3 Host SignallingIgmp v3lite Host Signalling URD Host Signalling IPC-462Body Retrieved URL string successfully /body Html IPC-463HTTP/1.1 200 OK Denial of Service Attacks from Unwanted Sources Inhibited Easy to Install and ManageBenefits IP Multicast Address Management Not RequiredIdeal for Internet Broadcast Applications Legacy Applications Within the SSM Range RestrictionsIgmp v3lite and URD Require a Cisco IOS Last Hop Router Address Management RestrictionsState Maintenance Limitations Igmp Snooping and Cgmp LimitationsURD Intercept URL Limitations Hsil LimitationsSSM Configuration Task List Configuring SSMMonitoring SSM IPC-467SSM Configuration Examples SSM with IGMPv3 ExampleSSM with Igmp v3lite and URD Example SSM Filtering ExampleIPC-469 IPC-470 IPC-471 Configuring Bidirectional PIMBidir-PIM Overview IPC-472 Unidirectional Shared Tree and Source TreeDF Election IPC-473Bidir-PIM Configuration Task List Bidirectional Group Tree BuildingPacket Forwarding IPC-474IPC-475 Configuring Bidir-PIMVerifying Bidirectional Groups IPC-476 Bidir-PIM Configuration ExampleMonitoring and Maintaining Bidir-PIM IPC-477 Configuring Multicast Source Discovery ProtocolHow Msdp Works IPC-478 Msdp Running Between RP PeersMsdp Configuration Task List IPC-479IPC-480 Configuring an Msdp PeerCaching SA State Configured, this command provides nothing Requesting Source Information from an Msdp PeerControlling Source Information That Your Router Originates Redistributing SourcesUsing an Msdp Filter Controlling Source Information That Your Router ForwardsFiltering SA Request Messages IPC-482IPC-483 Using TTL to Limit the Multicast Data Sent in SA MessagesControlling Source Information That Your Router Receives Configuring a Default Msdp Peer IPC-484IPC-485 Configuring an Msdp Mesh GroupShutting Down an Msdp Peer Including a Bordering PIM Dense Mode Region in Msdp Configures the router on the border between a dense modeSparse mode region to send SA messages about active sources Dense mode region. The IP address of the interface is usedMonitoring and Maintaining Msdp IPC-487Msdp Configuration Examples Default Msdp PeerLogical RP IPC-488RouterA Configuration IPC-489No shutdown Router ospf RouterB ConfigurationIPC-490 RouterE Configuration IPC-491No shutdown Interface Loopback10 Hostname RouterE Ip routingIPC-492 Ip multicast boundary 20 no shutdown Router ospfIPC-493 Configuring PGM Host and Router AssistPGM Overview Network Topology Using PGM Host and Router Assist IPC-494IPC-495 PGM Host Configuration Task ListEnabling PGM Host Verifying PGM Host Configuration Enabling PGM Host with a Virtual Host InterfaceEnabling PGM Host with a Physical Interface IPC-496IPC-497 IPC-498 PGM Router Assist Configuration Task ListEnabling PGM Router Assist Monitoring and Maintaining PGM Host Enabling PGM Router Assist with a Virtual Host InterfaceEnabling PGM Router Assist with a Physical Interface IPC-499IPC-500 PGM Host and Router Assist Configuration ExamplesMonitoring and Maintaining PGM Router Assist PGM Host with a Virtual Interface Example PGM Host with a Physical Interface ExampleIPC-501 Ip pgm host Interface vif1PGM Router Assist with a Virtual Interface Example PGM Router Assist with a Physical Interface ExampleIPC-502 Ip pgm routerIPC-503 IPC-504 IPC-505 Configuring Unidirectional Link RoutingUdlr Overview Udlr Tunnel IPC-506Igmp Proxy IPC-507Udlr Tunnel Configuration Task List Configuring Udlr TunnelPrerequisite IPC-508IPC-509 Igmp Udlr Configuration Task List Configuring the Igmp UDLConfigures Igmp on the interface to be unidirectional UDL interfaceIgmp Proxy Configuration Task List Changing the Distance for the Default RPF InterfaceMonitoring Igmp Udlr Displays Udlr information for directly connected multicastIPC-512 Configuring Igmp ProxyVerifying Igmp Proxy Udlr Configuration Examples Udlr Tunnel ExampleThis section provides the following Udlr examples IPC-513Configure tunnel as send-only Udlr tunnel Igmp Udlr ExampleIPC-514 Ip multicast-routing Serial1 has receive-only capabilityIPC-515 Uplink Router uplink-rtr ConfigurationDownlink Router downlink-rtr Configuration Igmp Proxy Example IPC-516IPC-517 Ip igmp unidirectional linkUpstream Configuration Integrated Udlr Tunnel, Igmp UDLR, and Igmp Proxy ExampleIPC-518 Ip multicast-routing Interface Tunnel0Downstream Configuration No cdp enableIPC-519 Ip pim sparse-mode Ip igmp unidirectional-linkIPC-520 IPC-521 Using IP Multicast ToolsMulticast Routing Monitor Overview MRM Configuration Task List Configuring a Test Sender and Test ReceiverRestrictions IPC-522Monitoring Multiple Groups IPC-523IPC-524 Configuring a ManagerConducting an MRM Test IPC-525 Monitoring IP Multicast RoutingMonitoring and Maintaining MRM MRM Configuration Example Test Sender ConfigurationTest Receiver Configuration Manager ConfigurationIPC-527 ProtocolIP Multicast Routing Overview Rgmp Overview IPC-528IPC-529 IgmpIPC-530 PIM-SM RgmpRgmp Configuration Task List IPC-531Verifying Rgmp Configuration Rgmp and enters interface configuration modeEnables Rgmp on a specified interface Enabling RgmpMonitoring and Maintaining Rgmp IPC-533Rgmp Configuration Example IPC-534Switch a Configuration Switch B ConfigurationSwitch enable set igmp enable Switch enable set rgmp enable IPC-535IPC-536 IPC-537 Configuring Dvmrp InteroperabilityBasic Dvmrp Interoperability Configuration Task List Configuring Dvmrp Interoperability Responding to mrinfo RequestsDvmrp reports Injected into DvmrpConfiguring a Dvmrp Tunnel IPC-539Advertising Network 0.0.0.0 to Dvmrp Neighbors Enabling Dvmrp Unicast RoutingAdvertises network 0.0.0.0 to Dvmrp neighbors IPC-540Configuring a Dvmrp Summary Address Enables Dvmrp unicast routingLimiting the Number of Dvmrp Routes Advertised Changing the Dvmrp Route ThresholdDisables Dvmrp automatic summarization Disabling Dvmrp Automatic summarizationAdding a Metric Offset to the Dvmrp Route Specifies a Dvmrp summary addressRejecting a Dvmrp Nonpruning Neighbor IPC-543IPC-544 Configuring a Delay Between Dvrmp ReportsPrevents peering with nonpruning Dvmrp neighbors Dvmrp Configuration Examples Monitoring and Maintaining DvmrpDvmrp Interoperability Example Dvmrp Tunnel ExampleUnnumbered Ethernet Pim Dense-mode Tunnel Source Tunnel Mode dvmrp Interface ethernetIPC-546 Index Page IN-549 IN-550 IN-551 IN-552 IN-553 IN-554 IN-555 IN-556 IN-557 IN-558 IN-559 IN-560 IN-561 IN-562 IN-563 IN-564 IN-565 IN-566 IN-567 IN-568 IN-569 IN-570 IN-571 IN-572 IN-573 IN-574 IN-575 IN-576 IN-577 IN-578