IP Routing Protocols

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Contents

Corporate Headquarters Cisco IOS Configuration Guide Cisco IOS IP Configuration Guide Iii N T E N T S IP Multicast IPC-4 Benefits IPC-35 Configuring the Default Router for the Client Enabling the Cisco IOS Dhcp Client on Ethernet Interfaces Vii Viii Enabling Hsrp IPC-101 Enabling CEF IPC-116 Slow Start IPC-137 Registration IPC-162 Routing Xii Enabling HA Redundancy for a Physical Network IPC-172 Xiii Configuring Interpacket Delay Xiv Enabling Ospf IPC-225 Changing Ospf Administrative Distance Example IPC-252 Xvi Configuring Integrated IS-IS Xvii BGP Multipath Support Xviii Indicating Backdoor Routes Xix BGP Path Filtering by Neighbor Examples IPC-340 Filtering Sources of Routing Information Xxi PIM Xxii Restrictions IPC-412 IPC-430 Xxiii Xxiv SSM Operations IPC-460 Xxv Bidirectional Group Tree Building IPC-474 Xxvi Enabling PGM Host IPC-495 Xxvii Rgmp Overview Xxviii Documentation Organization About Cisco IOS Software DocumentationDocumentation Objectives Audience Xxx Shows the Cisco IOS software documentation modules Module DC/DR Module TC/TR Xxxi Xxxii Master IndexesSupporting Documents and Resources Xxxiii New and Changed InformationDocument Conventions Convention Description Xxxiv Documentation CD-ROM Obtaining DocumentationDocumentation Feedback World Wide Web Technical Assistance Center Contacting TAC by Using the Cisco TAC WebsiteObtaining Technical Assistance Cisco.com Xxxvii Contacting TAC by Telephone Xxxviii 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 Xliii Using the no and default Forms of Commands Xliv Saving Configuration ChangesFiltering Output from the show and more Commands Building configuration Xlv Using Feature NavigatorUsing Software Release Notes Identifying Supported Platforms Xlvi IP Overview IP Addressing and Services Interior 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 IPC-10 Disabling Classless Routing Behavior IPC-11 Enabling IP Processing on a Serial Interface Assigning an explicit IP address to the interface Configuring Address Resolution MethodsEstablishing Address Resolution Routerconfig-if# ip unnumbered type number Were the owner of the specified IP address Defining a Static ARP CacheGlobally associates an IP address with a media hardware Address in the ARP cache IPC-14 Setting ARP EncapsulationsEnables proxy ARP on the interface Enabling Proxy ARP IPC-15 Configuring Local-Area MobilityMapping Host Names to IP Addresses IPC-16 Assigning Host Names to IP AddressesSpecifying the Domain Name IPC-17 Using the DNS to Discover ISO Clns AddressesSpecifying a Name Server Enabling the DNS IPC-18 Configuring HP Probe Proxy Name RequestsConfiguring the Next Hop Resolution Protocol Cisco Implementation of Nhrp Destination host IPC-19 IPC-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 IPC-23 Routerconfig-if# ip nhrp use usage-countTriggering Nhrp Based on Traffic Thresholds Is attempted IPC-24 IPC-25 Controlling the Nhrp Packet Rate IPC-26 Suppressing Forward and Reverse Record OptionsSpecifying the Nhrp Responder Address IPC-27 Configuring a GRE Tunnel for Multipoint OperationConfiguring Nhrp Server-Only Mode Enabling IP Routing IPC-28 Routing Assistance When IP Routing Is DisabledDefault Gateway Proxy ARP IPC-29 Icmp Router Discovery Protocol IPC-30 Configuring a Routing ProcessEnabling IP Bridging Enabling Integrated Routing and Bridging IPC-31 Configuring Broadcast Packet Handling On an interface Forwarding UDP broadcast packets, such as BootpRouterconfig-if# ip helper-address address Forwarding UDP Broadcast Packets and Protocols Bit Address nethost Establishing an IP Broadcast AddressFlooding IP Broadcasts Establishes a different broadcast address other than IPC-34 Speeding Up Flooding of UDP Datagrams IPC-35 Configuring Network Address TranslationNAT Applications Benefits IPC-36 NAT Configuration Task ListNAT Terminology IPC-37 Translating Inside Source Addresses IPC-38 Configuring Static TranslationConfiguring Dynamic Translation with an Access List IPC-39 Configuring Dynamic Translation with a Route MapOverloading an Inside Global Address IPC-40 Defines a standard access list IPC-41 Translating Overlapping Addresses NAT Translating Overlapping Addresses IPC-42 IPC-43 Configuring Dynamic TranslationProviding TCP Load Distribution IPC-44 1.127 IPC-45 Changing Translation TimeoutsChanges the timeout value for dynamic address Translations that do not use overloading IPC-46 Monitoring and Maintaining NATDeploying NAT Between an IP Phone and Cisco CallManager IPC-47 Monitoring and Maintaining IP AddressingClearing Caches, Tables, and Databases Specifying the Format of Network Masks IPC-48 Displaying System and Network Statistics IPC-49 IP Addressing ExamplesMonitoring and Maintaining Nhrp Creating a Network from Separated Subnets Example Serial Interfaces Configuration ExampleRouter B Configuration Router C Configuration Logical Nbma Example IP Domains ExampleDynamic Lookup Example HP Hosts on a Network Segment Example Two Logical Nbma Networks over One Physical Nbma Network IPC-52 IPC-53 Nhrp over ATM Example IPC-54 Router a Configuration IPC-55 Changing the Rate for Triggering SVCs Example Interface ATM0/0.1 multipoint IPC-56Interface Fddi1/0/0 Interface Fddi4/0/0 Applying Nhrp Rates to Specific Destinations ExampleIPC-57 Ip nhrp network-id Ip nhrp trigger-svc 100 IPC-58 Nhrp on a Multipoint Tunnel Example IPC-59 Router D ConfigurationBroadcasting Examples Flooded Broadcast Example Interface serial Helper Addresses ExampleFlooding of IP Broadcasts Example IPC-60 Dynamic Inside Source Translation Example NAT Configuration ExamplesFollowing example shows the configuration Following sections show NAT configuration examples IPC-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 Dhcp Request for an IP Address from a Dhcp Server IPC-66 IPC-67 Dhcp Client OverviewDhcp Relay Agent Overview Routerconfig# service dhcp Dhcp Configuration Task ListEnabling the Cisco IOS Dhcp Server and Relay Agent Features Features Dhcp clients Configuring a Dhcp Address PoolExcluding IP Addresses Database transfers IPC-70 Configuring the Dhcp Address Pool Subnet and MaskConfiguring the Domain Name for the Client Configuring the Address Lease Time Configuring Manual BindingsConfiguring the NetBIOS Node Type for the Client Configuring the Default Router for the Client IPC-72 Command Enabling the Cisco IOS Dhcp Client on Ethernet Interfaces Configuring a Dhcp Server Boot FileConfiguring the Number of Ping Packets Configuring the Timeout Value for Ping Packets IPC-74 Eight IP addresses in one command lineExits Dhcp pool configuration mode Import Dhcp option parameters into the Dhcp server database IPC-75 Configuring a Relay Agent Information Reforwarding PolicyEnabling the Dhcp Smart-Relay Feature Monitoring and Maintaining the Dhcp Server IPC-76 Configuration Examples Default-router 172.16.2.100 172.16.2.101 lease Dhcp Database Agent Configuration ExampleDhcp Address Pool Configuration Example Default-router 172.16.1.100 172.16.1.101 lease IPC-78 Manual Bindings Configuration ExampleOn the Dhcp Server, the configuration is as follows Cisco IOS Dhcp Client Example IPC-79 Dhcp Server Options Import and Autoconfiguration ExampleCentral Router Remote Router IPC-80 IPC-81 Configuring IP ServicesIP Services Task List Managing IP Connections Messages Routerconfig-if# ip unreachablesEnabling Icmp Protocol Unreachable Messages Enabling Icmp Redirect Messages IPC-83 Enables the sending of Icmp mask reply messagesEnabling Icmp Mask Reply Messages Understanding Path MTU Discovery Sets the IP MTU packet size for an interface Setting the MTU Packet SizeRouterconfig-if# ip mtu bytes Enabling IP Source Routing IPC-85 Configuring Simplex Ethernet InterfacesConfiguring a DRP Server Agent Assigns a transmit interface to a receive-only interface IPC-86 Configuring Authentication of DRP Queries and ResponsesEnabling the DRP Server Agent Limiting the Source of DRP Queries IPC-87 Filtering IP Packets Using Access Lists IPC-88 Creating Standard and Extended Access Lists Using Numbers IPC-89 IPC-90 IPC-91 Creating Standard and Extended Access Lists Using Names IPC-92 IPC-93 Specifying IP Extended Access Lists with Fragment Control IPC-94 If the Access-List Entry has Then IPC-95 Benefits of Fragment Control in an IP Extended Access List IPC-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 IPC-100 Configuring the Hot Standby Router Protocol IPC-101 Enables the HsrpRouterconfig-if# standby group-number ip Enabling Hsrp IPC-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 IPC-105 Enabling Hsrp Support for Icmp Redirect MessagesVerifying Hsrp Support for Mpls VPNs Redirects to Active Hsrp Routers IPC-106 Redirects Not Sent Redirects to Passive Hsrp RoutersRedirects to Non-HSRP Routers Passive Hsrp Router Advertisements IPC-108 Configuring IP AccountingConfiguring Hsrp Support for Icmp Redirect Messages IPC-109 Configuring IP MAC Accounting IPC-110 Configuring TCP Performance ParametersConfiguring IP Precedence Accounting Configures IP accounting based on the precedence Expressing TCP Header Compression Enables TCP header compressionRouterconfig-if# ip tcp Compressing TCP Packet Headers Can exist on an interface Setting the TCP Connection Attempt TimeEnabling TCP Path MTU Discovery Changing the Number of TCP Header Compression Connections IPC-113 Enables Path MTU DiscoveryEnabling TCP Selective Acknowledgment IPC-114 Setting the TCP Maximum Read SizeSetting the TCP Window Size Enabling TCP Time Stamp IPC-115 Configuring IP over WANsSetting the TCP Outgoing Queue Size Sets the TCP outgoing queue size IPC-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 Simplex Ethernet Interfaces Example Icmp Services ExampleRouter 1 Configuration Router 2 Configuration IPC-122 Numbered Access List ExamplesIp access-group 2 out DRP Server Agent Example IPC-123 Turbo Access Control List ExampleImplicit Masks in Access Lists Examples Interface Ethernet0/5 Named Access List ExampleExtended Access List Examples IPC-124 Interface ethernet Ip access-group strict IP Extended Access List with Fragment Control ExampleTime Range Applied to an IP Access List Example Commented IP Access List Entry Examples Deny tcp 171.69.0.0 0.0.255.255 any eq telnet IP Accounting ExampleHsrp Load Sharing Example IPC-126 IPC-127 No Switch or Learning Bridge Present ExampleSwitch or Learning Bridge Present Example Hsrp MAC Refresh Interval Examples Hsrp Support for Mpls VPNs Example Primary Router ConfigurationBackup Router Configuration Hsrp MIB Trap Example IPC-129 Router PE1 ConfigurationRouter PE2 Configuration Hsrp Support for Icmp Redirect Messages Example IPC-130 Forwarding Agent Configuration for FA2 ExampleMnlb Forwarding Agent Examples IPC-131 Services Manager Configuration for SM Example Ip address 172.26.56.19 Failover ip address 0.0.0.0 failover Password ciscoNo snmp-server location Casa service-manager port IPC-132 IPC-133 Configuring Server Load Balancing IPC-134 IOS SLB Functions and Capabilities IPC-135 Weighted Round RobinWeighted Least Connections Algorithms for Server Load Balancing Sticky Connections Content Flow Monitor SupportPort-Bound Servers Client-Assigned Load Balancing Automatic Unfail Delayed Removal of TCP Connection ContextTCP Session Reassignment Automatic Server Failure Detection IPC-138 Dynamic Feedback Protocol for IOS SLBAlternate IP Addresses Transparent Web Cache Balancing IPC-139 Redundancy Enhancement-Stateless BackupRestrictions IPC-140 IOS SLB Configuration Task List IPC-141 Specifying a Server FarmSpecifying a Load-Balancing Algorithm IPC-142 Configuring Real Server AttributesSpecifying a Bind ID Specifying a Real Server Associating a Virtual Server with a Server Farm Enabling the Real Server for ServiceConfiguring Virtual Server Attributes Specifying a Virtual Server IPC-144 Adjusting Virtual Server ValuesEnabling the Virtual Server for Service Preventing Advertisement of Virtual Server Address How IOS SLB Stateless Backup Works Configuring IOS SLB Dynamic Feedback ProtocolConfiguring NAT Implementing IOS SLB Stateless Backup IPC-146 Configuring IOS SLB Stateless Backup IPC-147 Verifying the IOS SLB Stateless Backup ConfigurationCustomizing Group Attributes 10.10.10.1223 Verifying IOS SLB InstallationVerifying IOS SLB IPC-148 IPC-149 Verifying Server Failure DetectionVerify that the the connection counts are increasing IPC-150 Troubleshooting IOS SLBQuestion Answer IPC-151 Monitoring and Maintaining IOS SLB IPC-152 IOS SLB Network Configuration Example IPC-153 NAT Configuration Example IPC-154 Configuration statements for Switch B are as followsConfiguration statements for Switch C are as follows IPC-155 Hsrp Configuration Example IPC-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 IPC-159 Configuring Mobile IPWhy is Mobile IP Needed? Mobile IP Overview IPC-160 Mobile IP Components IPC-161 How Mobile IP WorksAgent Discovery IPC-162 RegistrationRouting IPC-163 Mobile IP Security IPC-164 Storing Security Associations How HA Redundancy Works Home Agent RedundancyStoring SAs on AAA Hsrp Groups IPC-166 Prerequisites IPC-167 Mobile IP Configuration Task ListEnabling Home Agent Services IPC-168 Enabling Foreign Agent ServicesConfiguring AAA in the Mobile IP Environment IPC-169 Configuring Radius in the Mobile IP EnvironmentConfiguring TACACS+ in the Mobile IP Environment Verifying Setup IPC-170 Mobile IP HA Redundancy Configuration Task ListMonitoring and Maintaining Mobile IP Shutting Down Mobile IP IPC-171 Enabling Mobile IP IPC-172 Enabling HA Redundancy for a Physical Network IPC-173 Address option Defines the virtual networks. Repeat this step forEach virtual network. If the mobile node and home Agent are on the same subnet, use the address IPC-175 Verifying HA Redundancy IPC-176 Mobile IP Configuration ExamplesHome Agent Configuration Example Monitoring and Maintaining HA Redundancy IPC-177 Home Agent Using AAA Server Example Mobile Node Home Physical Network Foreign Agent Configuration ExampleMobile IP HA Redundancy Configuration Examples Home Agent Address Configuration IPC-179 IPC-180 Repeat this command for each virtualHA Redundancy for Physical Networks Example Networks IPC-181 HA1 Configuration IPC-182 HA2 Configuration IPC-183 Mobile Node and Home Agent on Same Subnet Ip mobile home-agent standby SanJoseHANet2 virtual-network IPC-184Interface loopback0 Ip address 10.0.0.10 Ip mobile IPC-185 IPC-186 Interface ethernet0 Ip address 1.0.0.2 IPC-187 Interface e0 IPC-188 IPC-189 IPC-190 IPC-191 IPC-192 IP Routing Protocols Page IPC-195 Configuring On-Demand Routing IPC-196 On-Demand Routing Configuration Task ListEnabling ODR Router Reconfiguring CDP or ODR TimersFiltering ODR Information Filters ODR information on the hub IPC-198 Using ODR with Dialer Mappings IPC-199 Configuring Routing Information Protocol IPC-200 RIP Configuration Task ListEnabling RIP IPC-201 Allowing Unicast Updates for RIPAdjusting Timers Applying Offsets to Routing Metrics IPC-202 Specifying a RIP Version IPC-203 Enabling RIP AuthenticationRIP Route Summarization IPC-204 IPC-205 Configuring Route Summarization on an InterfaceRestrictions to RIP Route Summarization Verifying IP Route Summarization IPC-206 Disables automatic summarizationRunning Igrp and RIP Concurrently Disabling Automatic Route Summarization IPC-207 Command PurposesDisabling the Validation of Source IP Addresses Enabling or Disabling Split Horizon IPC-208 Configuring Interpacket DelayConnecting RIP to a WAN IPC-209 RIP Configuration ExamplesExample 1 Correct Configuration Route Summarization Examples Example Example 2 Incorrect ConfigurationTwo examples of configuring split horizon are provided Split Horizon Examples IPC-211 Configuration for Router aConfiguration for Router B Configuration for Router C IPC-212 Address Family Timers Example IPC-213 Configuring IgrpCisco Igrp Implementation IPC-214 Igrp Configuration Task ListIgrp Updates IPC-215 Allowing Unicast Updates for IgrpCreating the Igrp Routing Process Defines the variance associated with a particular path Routerconfig-router# variance multiplierDefining Unequal-Cost Load Balancing Controlling Traffic Distribution Distribute traffic proportionately to the ratios of metrics Adjusting the Igrp Metric WeightsAdjusts the Igrp metric Routerconfig-router# traffic-share balanced IPC-218 Disabling HolddownEnforcing a Maximum Network Diameter Validating Source IP Addresses IPC-219 Igrp Configuration Examples IPC-220 Igrp Feasible Successor Relationship Example IPC-221 Router Configuration aRouter Configuration B Router Configuration C IPC-222 IPC-223 Configuring OspfCisco Ospf Implementation IPC-224 Ospf Configuration Task List IPC-225 Configuring Ospf Interface ParametersEnabling Ospf Network segment Configuring Ospf over Different Physical NetworksConfiguring Your Ospf Network Type Specifies the authentication type for an interface IPC-227 Configuring Point-to-Multipoint, Broadcast NetworksConfiguring Ospf for Nonbroadcast Networks IPC-228 Configuring Ospf Area ParametersNonbroadcast media IPC-229 Configuring Ospf Nssa IPC-230 Configuring Route Summarization Between Ospf AreasImplementation Considerations IPC-231 Generating a Default RouteCreating Virtual Links IPC-232 Configuring Lookup of DNS NamesControlling Default Metrics Forcing the Router ID Choice with a Loopback Interface IPC-233 Changing the Ospf Administrative DistancesConfiguring Ospf on Simplex Ethernet Interfaces Configuring Route Calculation Timers Routerconfig# interface interface-type Configuring Ospf over On-Demand CircuitsEnables Ospf operation Configures Ospf on an on-demand circuit Changing the LSA Group Pacing Sends syslog message when an Ospf neighbor goes up or downRouterconfig-router# log-adjacency-changes Logging Neighbors Going Up or Down IPC-236 LSA Group Pacing With Multiple TimersOriginal LSA Behavior IPC-237 Routerconfig-router# timers lsa-group-pacingBlocking Ospf LSA Flooding Changes the group pacing of LSAs Mospf LSA packets Routerconfig-router# ignore lsa mospfReducing LSA Flooding Ignoring Mospf LSA Packets IPC-239 Displaying Ospf Update Packet Pacing IPC-240 Monitoring and Maintaining Ospf IPC-241 Ospf Configuration ExamplesOspf Point-to-Multipoint Example IPC-242 Mollie ConfigurationNeon Configuration Platty Configuration IPC-243 Jelly ConfigurationRoute information in the first configuration is as follows Ospf Point-to-Multipoint, Broadcast Example IPC-244 Ospf Point-to-Multipoint, Nonbroadcast ExampleVariable-Length Subnet Masks Example IPC-245 Basic Ospf Configuration ExamplesOspf Routing and Route Redistribution Examples IPC-246 Complex Internal Router, ABR, and ASBRs Example IPC-247 This configuration, five routers are configured with Ospf IPC-248 Neighbor 11.0.0.6 remote-as Complex Ospf Configuration for ABR ExamplesIPC-249 IPC-250 Following configuration Ospf is on networkFollowing configuration Igrp autonomous system 200 is on Route Map Examples Router isis IPC-251Router rip Redistribute ospf 109 route-map Router bgp Redistribute ospf 109 route-map IPC-252 Changing Ospf Administrative Distance Example IPC-253 Ospf over On-Demand Routing Example Dialer-list 1 protocol ip permit IPC-254 IPC-255 LSA Group Pacing ExampleBlock LSA Flooding Example Ignore Mospf LSA Packets Example IPC-256 IPC-257 Configuring EigrpCisco Eigrp Implementation IPC-258 Associates networks with an Eigrp routing process Eigrp Configuration Task ListEnables an Eigrp routing process in global Enabling Eigrp Logging Eigrp Neighbor Adjacency Changes Configuring the Percentage of Link Bandwidth UsedAdjusting the Eigrp Metric Weights Making the Transition from Igrp to Eigrp IPC-261 Mismatched K Values Value mismatch Disabling Route SummarizationGoodbye Message IPC-262 IPC-263 Configuring Summary Aggregate AddressesConfiguring Floating Summary Routes Configures a summary aggregate address 10.1.1.0/24 0.0/0 Router-A Router-B Router-C IPC-264 IPC-265 Configuring Eigrp Route AuthenticationConfigure an interface type and enter interface Enables MD5 authentication in Eigrp packets IPC-266 Configuring Eigrp Protocol-Independent Parameters Process Configures the hello interval for an Eigrp routingConfigures the hold time for an Eigrp routing process Disabling Split Horizon IPC-268 Configuring Eigrp Stub Routing IPC-269 Dual-Homed Remote Topology IPC-270 IPC-271 Verifying Eigrp Stub Routing Eigrp Stub Routing Configuration Task ListConfiguring Eigrp Stub Routing Monitoring and Maintaining Eigrp IPC-273 Eigrp Configuration ExamplesRoute Summarization Example IPC-274 Exit Key Key-string Route Authentication ExampleIPC-275 Infinite Eigrp stub connected static Stub Routing ExampleIPC-276 IPC-277 Configuring Integrated IS-ISIS-IS Configuration Task List Enabling IS-IS and Assigning Areas IPC-278 Routerconfig# router isis area tag IPC-279 IS-IS Interface Parameters Configuration Task ListEnabling IP Routing for an Area on an Interface IPC-280 Configuring IS-IS Link-State MetricsSetting the Advertised Hello Interval Setting the Advertised Csnp Interval IPC-281 Setting the Retransmission IntervalSetting the LSP Transmissions Interval Setting the Retransmission Throttle Interval Specifying the Interface Circuit Type Setting the Hello MultiplierAssigning a Password for an Interface Specifying Designated Router Election IPC-283 Configuring Mesh GroupsLimiting LSP Flooding Blocking Flooding on Specific Interfaces Specifying the System Type Miscellaneous IS-IS Parameters Configuration Task ListGenerating a Default Route Forces a default route into the IS-IS routing domain IPC-285 Configuring IS-IS Authentication PasswordsSetting the Overload Bit Summarizing Address Ranges Sets the overload bit Tuning LSP Interval and LifetimeRouterconfig-router# set-overload-bit Changing the Routing Level for an Area Router’s database without being refreshed Router Config-router# max-lsp-lifetimePartial Route Computation PRC Sets the LSP refresh interval IPC-288 Modifying the Output of show Commands IPC-289 IS-IS Configuration ExamplesEnabling IS-IS Configuration Example Monitoring IS-IS IPC-290 Multiarea IS-IS Configuration for Clns Network Example Router isis BB IS-IS Throttle Timers ExampleIPC-291 IPC-292 IPC-293 Configuring BGPCisco BGP Implementation IPC-294 How BGP Selects Paths IPC-295 Basic BGP Configuration Task ListBGP Multipath Support IPC-296 Advanced BGP Configuration Task List IPC-297 Configuring Basic BGP FeaturesConfiguring BGP Neighbors Enabling BGP Routing Is memory-intensive Type of Reset Advantages DisadvantagesCapability Policy updates without modification Managing Routing Policy Changes IPC-299 Resetting a Router Using BGP Dynamic Inbound Soft ResetKeyword to specify that all connections be reset IPC-300 Resetting a Router Using BGP Outbound Soft Reset IPC-301 Verifying BGP Soft Reset IPC-302 Configuring BGP Interactions with IGPsDisables synchronization between BGP and an IGP Timer Starts Wakeups IPC-303 Configuring BGP WeightsDisabling Autonomous System Path Comparison IPC-304 Configuring BGP Route Filtering by NeighborConfiguring BGP Filtering Using Prefix Lists Removes a prefix list with the name specified for list-name How the System Filters Traffic by Prefix ListCreating a Prefix List Argument Len ge-value = le-value = Configuring a Prefix List EntryTo the entry IPC-306 IPC-307 Deleting a Prefix List or Prefix List EntriesDisplaying Prefix Entries IPC-308 Configuring BGP Path Filtering by NeighborDisabling Next Hop Processing on BGP Updates Clearing the Hit Count Table of Prefix List Entries IPC-309 Disabling Next Hop Processing Using a Specific AddressDisabling Next Hop Processing Using a Route Map Configuring BGP Next Hop Propagation IPC-310 Configuring the BGP VersionConfiguring the MED Metric Configuring Aggregate Addresses Configuring Advanced BGP FeaturesUsing Route Maps to Modify Updates Resetting eBGP Connections Immediately upon Link Failure IPC-312 Configuring BGP Community FilteringDisabling Automatic Summarization of Network Numbers IPC-313 IPC-314 Configuring BGP Conditional AdvertisementSpecifying the Format for the Community IPC-315 BGP Conditional Advertisement Configuration Task ListConditional Advertisement of a Set of Routes Verifying BGP Conditional Advertisement IPC-316 Configuring a Routing Domain ConfederationBGP Conditional Advertisement Troubleshooting Tips Configures a BGP confederation IPC-317 Configuring a Route ReflectorSpecifies the autonomous systems that belong to Confederation Simple BGP Model with a Route Reflector IPC-318 Specified neighbor as a client Configures the local router as a BGP route reflectorConfigures the cluster ID Routerconfig-router# bgp cluster-id cluster-id Creates a BGP peer group Configuring BGP Peer GroupsRouterconfig-router# neighbor peer-group-name Creating the Peer Group IPC-321 Assigning Options to the Peer Group IPC-322 Invokes MD5 authentication on a TCP connection to a BGPConfigures the software to start storing received updates 000307 %TCP-6-BADAUTH No MD5 digest from 10.0.0.2179 to Old BehaviorNew Behavior IPC-323 IPC-324 Disabling a Peer or Peer GroupMaking Neighbors Members of the Peer Group Modifying Parameters While Updating the IP Routing Table Setting Administrative DistanceAdjusting BGP Timers Indicating Backdoor Routes IPC-326 Changing the Default Local Preference ValueRedistributing Network IPC-327 Selecting Path Based on MEDs from Other Autonomous Systems IPC-328 Configuring Route DampeningMinimizing Flapping IPC-329 Understanding Route Dampening TermsEnabling Route Dampening IPC-330 Changes the default values of route dampening factorsRouterconfig# bgp dampening half-life reuse Monitoring and Maintaining BGP Route Dampening IPC-331 Monitoring and Maintaining BGPClears route dampening information and unsuppresses Suppressed routes IPC-332 BGP Configuration ExamplesLogging Changes in Neighbor Status Router bgp Redistribute igrp 109 route-map igrp2bgp BGP Route Map ExamplesIPC-333 Router bgp Neighbor 1.1.1.1 route-map freddy out IPC-334 Set local-preference 25 set metric Set weightSet automatic-tag Ip as-path access-list 1 permit Access-list 2 permit 0.0.0.0 Router bgp Neighbor 1.1.1.1 remote-as IPC-335Router bgp Neighbor 1.1.1.2 remote-as IPC-336 BGP Neighbor Configuration Examples Ip prefix-list abc permit 35.0.0.0/8 BGP Prefix List Filtering ExamplesIPC-337 Ip prefix-list abc deny 0.0.0.0/0 IPC-338 Added or Deleted Prefix List Entries Examples BGP Soft Reset ExamplesDynamic Inbound Soft Reset Example Inbound Soft Reset Using Stored Information Example IPC-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 IPC-344 BGP Confederation Examples IPC-345 BGP Peer Group ExamplesIBGP Peer Group Example EBGP Peer Group Example IPC-346 TCP MD5 Authentication for BGP ExamplesRouter bgp Neighbor 10.108.1.1 password bla4u00=2nkq IPC-347 Configuring Multiprotocol BGP Extensions for IP Multicast Incongruent Unicast and Multicast Routes IPC-348 IPC-349 Multiprotocol BGP Configuration Task List IPC-350 Configuring a Multiprotocol BGP PeerUnderstanding Nlri Keywords and Address Families IPC-351 Configuring a Multiprotocol BGP Peer Group IPC-352 Advertising Routes into Multiprotocol BGP IPC-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 Redistributes Dvmrp routes into multiprotocol BGP Redistributing Dvmrp Routes into Multiprotocol BGPRedistributes multiprotocol BGP routes into Dvmrp with a Redistributed IPC-356 Configuring a Multiprotocol BGP Route ReflectorConfiguring Aggregate Multiprotocol BGP Addresses IPC-357 Verifying Multiprotocol BGP Configuration and OperationConfigures an aggregate address with various Options IPC-358 Multiprotocol BGP Configuration ExamplesDatabase information Neighbor 10.1.1.1 activate Multiprotocol BGP Peer ExamplesMultiprotocol BGP Peer Group Examples IPC-359 IPC-360 Multiprotocol BGP Network Advertisement ExamplesMultiprotocol BGP Route Map Examples Multiprotocol BGP Route Redistribute Examples Aggregate-address 172.16.0.0 255.0.0.0 as-set Multiprotocol BGP Route Reflector ExamplesAggregate Multiprotocol BGP Address Examples IPC-361 IPC-362 IPC-363 Configuring IP Routing Protocol-Independent FeaturesProtocol-Independent Feature Task List IPC-364 Using Variable-Length Subnet MasksConfiguring Static Routes Route Source Default Distance IPC-365 Specifying Default RoutesSpecifying a Default Network IPC-366 Configuring Multi-Interface Load SplittingChanging the Maximum Number of Paths Understanding Gateway of Last Resort IPC-367 Redistributing Routing Information IPC-368 IPC-369 Understanding Supported Metric Translations Specified interface Preventing Routing Updates Through an InterfaceSuppresses the sending of routing updates through Filtering Routing Information IPC-371 Configuring Default Passive Interfaces IPC-372 Controlling the Advertising of Routes in Routing UpdatesControlling the Processing of Routing Updates Filtering Sources of Routing Information IPC-373 Defines a route map to control where packets are outputEnabling Policy Routing PBR Identifies the route map to use for policy routing IPC-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 IPC-378 Clearing Routes from the IP Routing Table Specified Displays authentication key informationDisplays all route maps configured or only the one Variable-Length Subnet Mask Example Ip route 10.0.0.0 255.0.0.0 172.18.3.4 Administrative Distance ExamplesOverriding Static Routes with Dynamic Protocols Example IPC-380 IPC-381 Access-list 3 permitStatic Routing Redistribution Example Igrp Redistribution Example IPC-382 RIP and Igrp Redistribution ExampleEigrp Redistribution Examples Complex Redistribution Example Configuration for router R1 router bgp NetworkRIP and Eigrp Redistribution Examples Simple Redistribution Example Redistribute bgp IPC-384 IPC-385 Internal Router, ABR, and ASBRs Configuration Example Example Ospf Autonomous System Network Map IPC-386 IPC-387 Neighbor 172.16.1.6 remote-as Complex Ospf Configuration ExampleIPC-388 Area 10.0.0.0 range 10.0.0.0 Following configuration, Ospf is on networkFollowing configuration Igrp autonomous system 1 is on IPC-389 IPC-390 Default Metric Values Redistribution ExamplePolicy Routing Route Map Examples IPC-391 Passive-interface ethernet 1 neighbor Passive Interface ExamplesIPC-392 No ip directed-broadcast Interface Serial Default Passive Interface ExamplePolicy Routing Example IPC-393 Key Management Examples Following example configures a key chain named treesSet default interface null0 Ip rip authentication key-chain trees media-type 10BaseT Ip rip receive version 1 no keepalive IPC-395 IPC-396 IP Multicast Page IPC-399 Configuring IP Multicast Routing IPC-400 Cisco IP Multicast Routing Implementation IPC-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 IPC-403 Enabling Dense ModeEnabling IP Multicast Routing Enabling PIM on an Interface Enables PIM sparse mode on the interface Enabling Sparse ModeEnabling Sparse-Dense Mode Enables PIM dense mode on the interface IPC-405 Configuring PIM Dense Mode State Refresh IPC-406 Configuring Auto-RPConfiguring a Rendezvous Point Configures the address of a PIM RP Announcing the RP and the Group Range It Serves Setting Up Auto-RP in a New InternetworkAdding Auto-RP to an Existing Sparse Mode Cloud Choosing a Default RP Preventing Join Messages to False RPs Filtering Incoming RP Announcement MessagesVerifying the Group-to-RP Mapping Starting to Use IP Multicast IPC-409 Igmp Features Configuration Task ListConfiguring a Router to Be a Member of a Group Controlling Access to IP Multicast Groups Igmp host-query messages Changing the Igmp VersionRouters That Run Igmp Version Selects the Igmp version that the router uses IPC-411 Configuring Igmp VersionSets the Igmp query timeout IPC-412 Restrictions Changing the Maximum Query Response Time Changing the Igmp Query TimeoutConfiguring the Router as a Statically Connected Member Routerconfig-if# ip igmp Group-specific or group-source-specific with IGMPv3 query Configuring Igmp Leave LatencyConfigures the interval at which the router sends Igmp Configures the number of times that the router sends Igmp Enabling SAP Listener Support Configuring the TTL ThresholdDisabling Fast Switching of IP Multicast SAP Listener Support Configuration Task List IPC-416 Routerconfig-if# ip sap listenLimiting How Long a SAP Cache Entry Exists Announcements IPC-417 Configuring PIM VersionFunctional address IPC-418 PIM Version 2 Configuration Task ListPrerequisites Specifying the PIM Version Configuring PIM Version 2 OnlyConfiguring PIM Sparse-Dense Mode Defining a PIM Sparse Mode Domain Border Interface IPC-420 Configuring Candidate BSRsConfiguring Candidate RPs IPC-421 Deciding When to Configure a BSRConfigures the router to be a candidate RP Making the Transition to PIM Version Monitoring the RP Mapping Information Advanced PIM Features Configuration Task ListDense Mode Sparse Mode Shared Tree and Source Tree Shortest-Path Tree IPC-423 IPC-424 Delaying the Use of PIM Shortest-Path TreeUnderstanding Reverse Path Forwarding Shortest-path tree IPC-425 Assigning an RP to Multicast GroupsIncreasing Control over RPs Modifying the PIM Router Query Message Interval IPC-426 Understanding the PIM Registering ProcessPIM Version 1 Compatibility IPC-427 Configuring the IP Source Address of Register MessagesLimiting the Rate of PIM Register Messages Enabling Proxy Registering IPC-428 Enabling PIM Nonbroadcast Multiaccess ModeEnables PIM Nbma mode Routerconfig-if# ip pim nbma-mode IPC-429 Configuring an IP Multicast Static Route Controls transmission rate to a multicast group Configuring RTP Header CompressionConfigures an IP multicast static route Controlling the Transmission Rate to a Multicast Group RTP Header Compression IPC-431 IPC-432 Enabling RTP Header Compression on a Serial InterfaceChanging the Number of Header Compression Connections IPC-433 Enabling Express RTP Header Compression IPC-434 IPC-435 IPC-436 Enabling IP Multicast over ATM Point-to-Multipoint VCsLimiting the Number of VCs Idled Idling PolicyHow the Idling Policy Works Keeping VCs from Idling IPC-438 Configuring an IP Multicast BoundaryConfiguring an Intermediate IP Multicast Helper IPC-439 Storing IP Multicast Headers Enabling Cgmp Configuring Stub IP Multicast RoutingUse the show ip mpacket Exec command to display the buffer Enables Cgmp IPC-441 Specified access listMessages to the specified IP address on a central router IPC-442 Enabling Native Load SplittingEnabling Load Splitting Across Tunnels Equal-cost paths IPC-443 Configuring the Access RouterConfiguring the Router at the Opposite End of the Tunnel IPC-444 Configuring Both Routers to RPF Serial1 Verifying the Load SplittingIPC-445 Tunnel0 IPC-446 IPC-447 Using IP Multicast Heartbeat IPC-448 IP Multicast Configuration ExamplesPIM Dense Mode Example PIM Sparse Mode Example This section provides examples in the following sections PIM Dense Mode State Refresh ExampleBSR Configuration Example PIM Version 2 Examples Ip pim sparse-dense-mode Router ospf Border Router Configuration ExampleRFC 2362 Interoperable Candidate RP Example IPC-450 IPC-451 RTP Header Compression Examples Interface Serial4/0 IPC-452No keepalive Clockrate No ip route-cache Interface Ethernet2/1 Ip route-cache Password lab login No scheduler max-task-time endIPC-453 Version IPC-454 IP Multicast over ATM Point-to-Multipoint VC Example Atm pvc 2 0 16 ilmi Administratively Scoped Boundary ExampleIP Multicast Helper Example IPC-455 IPC-456 Router A-First Hop Router ConfigurationRouter C-Last Hop Router Configuration Stub IP Multicast Example IP Multicast Load Splitting Across Equal-Cost Paths IPC-457 Ip multicast heartbeat ethernet0 224.1.1.1 1 1 IP Multicast Heartbeat ExampleIPC-458 Ip address 100.1.3.3 255.255.255.0 bandwidth Clock rate IPC-459 Configuring Source Specific MulticastSSM Components Overview IPC-460 How SSM Differs from Internet Standard MulticastSSM IP Address Range SSM Operations IPC-461 IGMPv3 Host SignallingIgmp v3lite Host Signalling IPC-462 URD Host Signalling Body Retrieved URL string successfully /body Html IPC-463HTTP/1.1 200 OK IP Multicast Address Management Not Required Denial of Service Attacks from Unwanted Sources InhibitedEasy to Install and Manage Benefits Address Management Restrictions Ideal for Internet Broadcast ApplicationsLegacy Applications Within the SSM Range Restrictions Igmp v3lite and URD Require a Cisco IOS Last Hop Router Hsil Limitations State Maintenance LimitationsIgmp Snooping and Cgmp Limitations URD Intercept URL Limitations IPC-467 SSM Configuration Task ListConfiguring SSM Monitoring SSM SSM Filtering Example SSM Configuration ExamplesSSM with IGMPv3 Example SSM with Igmp v3lite and URD Example IPC-469 IPC-470 IPC-471 Configuring Bidirectional PIMBidir-PIM Overview Unidirectional Shared Tree and Source Tree IPC-472 IPC-473 DF Election IPC-474 Bidir-PIM Configuration Task ListBidirectional Group Tree Building Packet Forwarding IPC-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 Msdp Running Between RP Peers IPC-478 IPC-479 Msdp Configuration Task List IPC-480 Configuring an Msdp PeerCaching SA State Redistributing Sources Configured, this command provides nothingRequesting Source Information from an Msdp Peer Controlling Source Information That Your Router Originates IPC-482 Using an Msdp FilterControlling Source Information That Your Router Forwards Filtering SA Request Messages IPC-483 Using TTL to Limit the Multicast Data Sent in SA MessagesControlling Source Information That Your Router Receives IPC-484 Configuring a Default Msdp Peer IPC-485 Configuring an Msdp Mesh GroupShutting Down an Msdp Peer Dense mode region. The IP address of the interface is used Including a Bordering PIM Dense Mode Region in MsdpConfigures the router on the border between a dense mode Sparse mode region to send SA messages about active sources IPC-487 Monitoring and Maintaining Msdp IPC-488 Msdp Configuration ExamplesDefault Msdp Peer Logical RP IPC-489 RouterA Configuration No shutdown Router ospf RouterB ConfigurationIPC-490 Hostname RouterE Ip routing RouterE ConfigurationIPC-491 No shutdown Interface Loopback10 Ip multicast boundary 20 no shutdown Router ospf IPC-492 IPC-493 Configuring PGM Host and Router AssistPGM Overview IPC-494 Network Topology Using PGM Host and Router Assist IPC-495 PGM Host Configuration Task ListEnabling PGM Host IPC-496 Verifying PGM Host ConfigurationEnabling PGM Host with a Virtual Host Interface Enabling PGM Host with a Physical Interface IPC-497 IPC-498 PGM Router Assist Configuration Task ListEnabling PGM Router Assist IPC-499 Monitoring and Maintaining PGM HostEnabling PGM Router Assist with a Virtual Host Interface Enabling PGM Router Assist with a Physical Interface IPC-500 PGM Host and Router Assist Configuration ExamplesMonitoring and Maintaining PGM Router Assist Ip pgm host Interface vif1 PGM Host with a Virtual Interface ExamplePGM Host with a Physical Interface Example IPC-501 Ip pgm router PGM Router Assist with a Virtual Interface ExamplePGM Router Assist with a Physical Interface Example IPC-502 IPC-503 IPC-504 IPC-505 Configuring Unidirectional Link RoutingUdlr Overview IPC-506 Udlr Tunnel IPC-507 Igmp Proxy IPC-508 Udlr Tunnel Configuration Task ListConfiguring Udlr Tunnel Prerequisite IPC-509 UDL interface Igmp Udlr Configuration Task ListConfiguring the Igmp UDL Configures Igmp on the interface to be unidirectional Displays Udlr information for directly connected multicast Igmp Proxy Configuration Task ListChanging the Distance for the Default RPF Interface Monitoring Igmp Udlr IPC-512 Configuring Igmp ProxyVerifying Igmp Proxy IPC-513 Udlr Configuration ExamplesUdlr Tunnel Example This section provides the following Udlr examples Ip multicast-routing Serial1 has receive-only capability Configure tunnel as send-only Udlr tunnelIgmp Udlr Example IPC-514 IPC-515 Uplink Router uplink-rtr ConfigurationDownlink Router downlink-rtr Configuration IPC-516 Igmp Proxy Example Ip igmp unidirectional link IPC-517 Ip multicast-routing Interface Tunnel0 Upstream ConfigurationIntegrated Udlr Tunnel, Igmp UDLR, and Igmp Proxy Example IPC-518 Ip pim sparse-mode Ip igmp unidirectional-link Downstream ConfigurationNo cdp enable IPC-519 IPC-520 IPC-521 Using IP Multicast ToolsMulticast Routing Monitor Overview IPC-522 MRM Configuration Task ListConfiguring a Test Sender and Test Receiver Restrictions IPC-523 Monitoring Multiple Groups IPC-524 Configuring a ManagerConducting an MRM Test IPC-525 Monitoring IP Multicast RoutingMonitoring and Maintaining MRM Manager Configuration MRM Configuration ExampleTest Sender Configuration Test Receiver Configuration IPC-527 ProtocolIP Multicast Routing Overview IPC-528 Rgmp Overview Igmp IPC-529 PIM-SM Rgmp IPC-530 IPC-531 Rgmp Configuration Task List Enabling Rgmp Verifying Rgmp ConfigurationRgmp and enters interface configuration mode Enables Rgmp on a specified interface IPC-533 Monitoring and Maintaining Rgmp IPC-534 Rgmp Configuration Example IPC-535 Switch a ConfigurationSwitch B Configuration Switch enable set igmp enable Switch enable set rgmp enable IPC-536 IPC-537 Configuring Dvmrp InteroperabilityBasic Dvmrp Interoperability Configuration Task List Injected into Dvmrp Configuring Dvmrp InteroperabilityResponding to mrinfo Requests Dvmrp reports IPC-539 Configuring a Dvmrp Tunnel IPC-540 Advertising Network 0.0.0.0 to Dvmrp NeighborsEnabling Dvmrp Unicast Routing Advertises network 0.0.0.0 to Dvmrp neighbors Changing the Dvmrp Route Threshold Configuring a Dvmrp Summary AddressEnables Dvmrp unicast routing Limiting the Number of Dvmrp Routes Advertised Specifies a Dvmrp summary address Disables Dvmrp automatic summarizationDisabling Dvmrp Automatic summarization Adding a Metric Offset to the Dvmrp Route IPC-543 Rejecting a Dvmrp Nonpruning Neighbor IPC-544 Configuring a Delay Between Dvrmp ReportsPrevents peering with nonpruning Dvmrp neighbors Dvmrp Tunnel Example Dvmrp Configuration ExamplesMonitoring and Maintaining Dvmrp Dvmrp Interoperability Example Unnumbered 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

Cisco Systems 78-11741-02 manual IP Routing Protocols

Models: 78-11741-02

IP Routing Protocols