Index

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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 Objectives About Cisco IOS Software DocumentationAudience Documentation Organization Xxx Shows the Cisco IOS software documentation modules Module DC/DR Module TC/TR Xxxi Xxxii Master IndexesSupporting Documents and Resources Document Conventions New and Changed InformationConvention Description Xxxiii Xxxiv Documentation Feedback Obtaining DocumentationWorld Wide Web Documentation CD-ROM Obtaining Technical Assistance Contacting TAC by Using the Cisco TAC WebsiteCisco.com Technical Assistance Center 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 Filtering Output from the show and more Commands Saving Configuration ChangesBuilding configuration Xliv Using Software Release Notes Using Feature NavigatorIdentifying Supported Platforms Xlv 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 Establishing Address Resolution Configuring Address Resolution MethodsRouterconfig-if# ip unnumbered type number Assigning an explicit IP address to the interface Globally associates an IP address with a media hardware Defining a Static ARP CacheAddress in the ARP cache Were the owner of the specified IP address Enables proxy ARP on the interface Setting ARP EncapsulationsEnabling Proxy ARP IPC-14 IPC-15 Configuring Local-Area MobilityMapping Host Names to IP Addresses IPC-16 Assigning Host Names to IP AddressesSpecifying the Domain Name Specifying a Name Server Using the DNS to Discover ISO Clns AddressesEnabling the DNS IPC-17 Configuring the Next Hop Resolution Protocol Configuring HP Probe Proxy Name RequestsCisco Implementation of Nhrp IPC-18 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 Triggering Nhrp Based on Traffic Thresholds Routerconfig-if# ip nhrp use usage-countIs attempted IPC-23 IPC-24 IPC-25 Controlling the Nhrp Packet Rate IPC-26 Suppressing Forward and Reverse Record OptionsSpecifying the Nhrp Responder Address Configuring Nhrp Server-Only Mode Configuring a GRE Tunnel for Multipoint OperationEnabling IP Routing IPC-27 Default Gateway Routing Assistance When IP Routing Is DisabledProxy ARP IPC-28 IPC-29 Icmp Router Discovery Protocol Enabling IP Bridging Configuring a Routing ProcessEnabling Integrated Routing and Bridging IPC-30 IPC-31 Configuring Broadcast Packet Handling Routerconfig-if# ip helper-address address Forwarding UDP broadcast packets, such as BootpForwarding UDP Broadcast Packets and Protocols On an interface Flooding IP Broadcasts Establishing an IP Broadcast AddressEstablishes a different broadcast address other than Bit Address nethost IPC-34 Speeding Up Flooding of UDP Datagrams NAT Applications Configuring Network Address TranslationBenefits IPC-35 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 Changes the timeout value for dynamic address Changing Translation TimeoutsTranslations that do not use overloading IPC-45 IPC-46 Monitoring and Maintaining NATDeploying NAT Between an IP Phone and Cisco CallManager Clearing Caches, Tables, and Databases Monitoring and Maintaining IP AddressingSpecifying the Format of Network Masks IPC-47 IPC-48 Displaying System and Network Statistics IPC-49 IP Addressing ExamplesMonitoring and Maintaining Nhrp Router B Configuration Serial Interfaces Configuration ExampleRouter C Configuration Creating a Network from Separated Subnets Example Dynamic Lookup Example IP Domains ExampleHP Hosts on a Network Segment Example Logical Nbma 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 IPC-57 Applying Nhrp Rates to Specific Destinations ExampleIp nhrp network-id Ip nhrp trigger-svc 100 Interface Fddi4/0/0 IPC-58 Nhrp on a Multipoint Tunnel Example Broadcasting Examples Router D ConfigurationFlooded Broadcast Example IPC-59 Flooding of IP Broadcasts Example Helper Addresses ExampleIPC-60 Interface serial Following example shows the configuration NAT Configuration ExamplesFollowing sections show NAT configuration examples Dynamic Inside Source Translation Example 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 Enabling the Cisco IOS Dhcp Server and Relay Agent Features Dhcp Configuration Task ListFeatures Routerconfig# service dhcp Excluding IP Addresses Configuring a Dhcp Address PoolDatabase transfers Dhcp clients IPC-70 Configuring the Dhcp Address Pool Subnet and MaskConfiguring the Domain Name for the Client Configuring the NetBIOS Node Type for the Client Configuring Manual BindingsConfiguring the Default Router for the Client Configuring the Address Lease Time IPC-72 Command Configuring the Number of Ping Packets Configuring a Dhcp Server Boot FileConfiguring the Timeout Value for Ping Packets Enabling the Cisco IOS Dhcp Client on Ethernet Interfaces Exits Dhcp pool configuration mode Eight IP addresses in one command lineImport Dhcp option parameters into the Dhcp server database IPC-74 Enabling the Dhcp Smart-Relay Feature Configuring a Relay Agent Information Reforwarding PolicyMonitoring and Maintaining the Dhcp Server IPC-75 IPC-76 Configuration Examples Dhcp Address Pool Configuration Example Dhcp Database Agent Configuration ExampleDefault-router 172.16.1.100 172.16.1.101 lease Default-router 172.16.2.100 172.16.2.101 lease On the Dhcp Server, the configuration is as follows Manual Bindings Configuration ExampleCisco IOS Dhcp Client Example IPC-78 Central Router Dhcp Server Options Import and Autoconfiguration ExampleRemote Router IPC-79 IPC-80 IP Services Task List Configuring IP ServicesManaging IP Connections IPC-81 Enabling Icmp Protocol Unreachable Messages Routerconfig-if# ip unreachablesEnabling Icmp Redirect Messages Messages Enabling Icmp Mask Reply Messages Enables the sending of Icmp mask reply messagesUnderstanding Path MTU Discovery IPC-83 Routerconfig-if# ip mtu bytes Setting the MTU Packet SizeEnabling IP Source Routing Sets the IP MTU packet size for an interface Configuring a DRP Server Agent Configuring Simplex Ethernet InterfacesAssigns a transmit interface to a receive-only interface IPC-85 Enabling the DRP Server Agent Configuring Authentication of DRP Queries and ResponsesLimiting the Source of DRP Queries IPC-86 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 Routerconfig-if# standby group-number ip Enables the HsrpEnabling Hsrp IPC-101 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 Verifying Hsrp Support for Mpls VPNs Enabling Hsrp Support for Icmp Redirect MessagesRedirects to Active Hsrp Routers IPC-105 IPC-106 Redirects to Non-HSRP Routers Redirects to Passive Hsrp RoutersPassive Hsrp Router Advertisements Redirects Not Sent IPC-108 Configuring IP AccountingConfiguring Hsrp Support for Icmp Redirect Messages IPC-109 Configuring IP MAC Accounting Configuring IP Precedence Accounting Configuring TCP Performance ParametersConfigures IP accounting based on the precedence IPC-110 Routerconfig-if# ip tcp Enables TCP header compressionCompressing TCP Packet Headers Expressing TCP Header Compression Enabling TCP Path MTU Discovery Setting the TCP Connection Attempt TimeChanging the Number of TCP Header Compression Connections Can exist on an interface IPC-113 Enables Path MTU DiscoveryEnabling TCP Selective Acknowledgment Setting the TCP Window Size Setting the TCP Maximum Read SizeEnabling TCP Time Stamp IPC-114 Setting the TCP Outgoing Queue Size Configuring IP over WANsSets the TCP outgoing queue size IPC-115 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 Router 1 Configuration Icmp Services ExampleRouter 2 Configuration Simplex Ethernet Interfaces Example Ip access-group 2 out Numbered Access List ExamplesDRP Server Agent Example IPC-122 IPC-123 Turbo Access Control List ExampleImplicit Masks in Access Lists Examples Extended Access List Examples Named Access List ExampleIPC-124 Interface Ethernet0/5 Time Range Applied to an IP Access List Example IP Extended Access List with Fragment Control ExampleCommented IP Access List Entry Examples Interface ethernet Ip access-group strict Hsrp Load Sharing Example IP Accounting ExampleIPC-126 Deny tcp 171.69.0.0 0.0.255.255 any eq telnet Switch or Learning Bridge Present Example No Switch or Learning Bridge Present ExampleHsrp MAC Refresh Interval Examples IPC-127 Backup Router Configuration Primary Router ConfigurationHsrp MIB Trap Example Hsrp Support for Mpls VPNs Example Router PE2 Configuration Router PE1 ConfigurationHsrp Support for Icmp Redirect Messages Example IPC-129 IPC-130 Forwarding Agent Configuration for FA2 ExampleMnlb Forwarding Agent Examples IPC-131 Services Manager Configuration for SM Example No snmp-server location Casa service-manager port Failover ip address 0.0.0.0 failover Password ciscoIPC-132 Ip address 172.26.56.19 IPC-133 Configuring Server Load Balancing IPC-134 IOS SLB Functions and Capabilities Weighted Least Connections Weighted Round RobinAlgorithms for Server Load Balancing IPC-135 Port-Bound Servers Content Flow Monitor SupportClient-Assigned Load Balancing Sticky Connections TCP Session Reassignment Delayed Removal of TCP Connection ContextAutomatic Server Failure Detection Automatic Unfail Alternate IP Addresses Dynamic Feedback Protocol for IOS SLBTransparent Web Cache Balancing IPC-138 IPC-139 Redundancy Enhancement-Stateless BackupRestrictions IPC-140 IOS SLB Configuration Task List IPC-141 Specifying a Server FarmSpecifying a Load-Balancing Algorithm Specifying a Bind ID Configuring Real Server AttributesSpecifying a Real Server IPC-142 Configuring Virtual Server Attributes Enabling the Real Server for ServiceSpecifying a Virtual Server Associating a Virtual Server with a Server Farm Enabling the Virtual Server for Service Adjusting Virtual Server ValuesPreventing Advertisement of Virtual Server Address IPC-144 Configuring NAT Configuring IOS SLB Dynamic Feedback ProtocolImplementing IOS SLB Stateless Backup How IOS SLB Stateless Backup Works IPC-146 Configuring IOS SLB Stateless Backup IPC-147 Verifying the IOS SLB Stateless Backup ConfigurationCustomizing Group Attributes Verifying IOS SLB Verifying IOS SLB InstallationIPC-148 10.10.10.1223 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 Why is Mobile IP Needed? Configuring Mobile IPMobile IP Overview IPC-159 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 Storing SAs on AAA Home Agent RedundancyHsrp Groups How HA Redundancy Works 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 Configuring TACACS+ in the Mobile IP Environment Configuring Radius in the Mobile IP EnvironmentVerifying Setup IPC-169 Monitoring and Maintaining Mobile IP Mobile IP HA Redundancy Configuration Task ListShutting Down Mobile IP IPC-170 IPC-171 Enabling Mobile IP IPC-172 Enabling HA Redundancy for a Physical Network IPC-173 Each virtual network. If the mobile node and home Defines the virtual networks. Repeat this step forAgent are on the same subnet, use the address Address option IPC-175 Verifying HA Redundancy Home Agent Configuration Example Mobile IP Configuration ExamplesMonitoring and Maintaining HA Redundancy IPC-176 IPC-177 Home Agent Using AAA Server Example Mobile IP HA Redundancy Configuration Examples Foreign Agent Configuration ExampleHome Agent Address Configuration Mobile Node Home Physical Network IPC-179 HA Redundancy for Physical Networks Example Repeat this command for each virtualNetworks IPC-180 IPC-181 HA1 Configuration IPC-182 HA2 Configuration IPC-183 Mobile Node and Home Agent on Same Subnet Interface loopback0 Ip address 10.0.0.10 IPC-184Ip mobile Ip mobile home-agent standby SanJoseHANet2 virtual-network 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 Filtering ODR Information Reconfiguring CDP or ODR TimersFilters ODR information on the hub Router IPC-198 Using ODR with Dialer Mappings IPC-199 Configuring Routing Information Protocol IPC-200 RIP Configuration Task ListEnabling RIP Adjusting Timers Allowing Unicast Updates for RIPApplying Offsets to Routing Metrics IPC-201 IPC-202 Specifying a RIP Version IPC-203 Enabling RIP AuthenticationRIP Route Summarization IPC-204 Restrictions to RIP Route Summarization Configuring Route Summarization on an InterfaceVerifying IP Route Summarization IPC-205 Running Igrp and RIP Concurrently Disables automatic summarizationDisabling Automatic Route Summarization IPC-206 Disabling the Validation of Source IP Addresses Command PurposesEnabling or Disabling Split Horizon IPC-207 IPC-208 Configuring Interpacket DelayConnecting RIP to a WAN Example 1 Correct Configuration RIP Configuration ExamplesRoute Summarization Examples IPC-209 Two examples of configuring split horizon are provided Example 2 Incorrect ConfigurationSplit Horizon Examples Example Configuration for Router B Configuration for Router aConfiguration for Router C IPC-211 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 Defining Unequal-Cost Load Balancing Routerconfig-router# variance multiplierControlling Traffic Distribution Defines the variance associated with a particular path Adjusts the Igrp metric Adjusting the Igrp Metric WeightsRouterconfig-router# traffic-share balanced Distribute traffic proportionately to the ratios of metrics Enforcing a Maximum Network Diameter Disabling HolddownValidating Source IP Addresses IPC-218 IPC-219 Igrp Configuration Examples IPC-220 Igrp Feasible Successor Relationship Example Router Configuration B Router Configuration aRouter Configuration C IPC-221 IPC-222 IPC-223 Configuring OspfCisco Ospf Implementation IPC-224 Ospf Configuration Task List IPC-225 Configuring Ospf Interface ParametersEnabling Ospf Configuring Your Ospf Network Type Configuring Ospf over Different Physical NetworksSpecifies the authentication type for an interface Network segment 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 Controlling Default Metrics Configuring Lookup of DNS NamesForcing the Router ID Choice with a Loopback Interface IPC-232 Configuring Ospf on Simplex Ethernet Interfaces Changing the Ospf Administrative DistancesConfiguring Route Calculation Timers IPC-233 Enables Ospf operation Configuring Ospf over On-Demand CircuitsConfigures Ospf on an on-demand circuit Routerconfig# interface interface-type Routerconfig-router# log-adjacency-changes Sends syslog message when an Ospf neighbor goes up or downLogging Neighbors Going Up or Down Changing the LSA Group Pacing IPC-236 LSA Group Pacing With Multiple TimersOriginal LSA Behavior Blocking Ospf LSA Flooding Routerconfig-router# timers lsa-group-pacingChanges the group pacing of LSAs IPC-237 Reducing LSA Flooding Routerconfig-router# ignore lsa mospfIgnoring Mospf LSA Packets 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 Neon Configuration Mollie ConfigurationPlatty Configuration IPC-242 Route information in the first configuration is as follows Jelly ConfigurationOspf Point-to-Multipoint, Broadcast Example IPC-243 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 Following configuration Igrp autonomous system 200 is on Following configuration Ospf is on networkRoute Map Examples IPC-250 Router rip Redistribute ospf 109 route-map IPC-251Router bgp Redistribute ospf 109 route-map Router isis IPC-252 Changing Ospf Administrative Distance Example IPC-253 Ospf over On-Demand Routing Example Dialer-list 1 protocol ip permit IPC-254 Block LSA Flooding Example LSA Group Pacing ExampleIgnore Mospf LSA Packets Example IPC-255 IPC-256 IPC-257 Configuring EigrpCisco Eigrp Implementation IPC-258 Enables an Eigrp routing process in global Eigrp Configuration Task ListEnabling Eigrp Associates networks with an Eigrp routing process Adjusting the Eigrp Metric Weights Configuring the Percentage of Link Bandwidth UsedMaking the Transition from Igrp to Eigrp Logging Eigrp Neighbor Adjacency Changes IPC-261 Mismatched K Values Goodbye Message Disabling Route SummarizationIPC-262 Value mismatch Configuring Floating Summary Routes Configuring Summary Aggregate AddressesConfigures a summary aggregate address IPC-263 10.1.1.0/24 0.0/0 Router-A Router-B Router-C IPC-264 Configure an interface type and enter interface Configuring Eigrp Route AuthenticationEnables MD5 authentication in Eigrp packets IPC-265 IPC-266 Configuring Eigrp Protocol-Independent Parameters Configures the hold time for an Eigrp routing process Configures the hello interval for an Eigrp routingDisabling Split Horizon Process IPC-268 Configuring Eigrp Stub Routing IPC-269 Dual-Homed Remote Topology IPC-270 IPC-271 Configuring Eigrp Stub Routing Eigrp Stub Routing Configuration Task ListMonitoring and Maintaining Eigrp Verifying Eigrp Stub Routing IPC-273 Eigrp Configuration ExamplesRoute Summarization Example IPC-274 IPC-275 Route Authentication ExampleInfinite Exit Key Key-string Eigrp stub connected static Stub Routing ExampleIPC-276 IS-IS Configuration Task List Configuring Integrated IS-ISEnabling IS-IS and Assigning Areas IPC-277 IPC-278 Routerconfig# router isis area tag IPC-279 IS-IS Interface Parameters Configuration Task ListEnabling IP Routing for an Area on an Interface Setting the Advertised Hello Interval Configuring IS-IS Link-State MetricsSetting the Advertised Csnp Interval IPC-280 Setting the LSP Transmissions Interval Setting the Retransmission IntervalSetting the Retransmission Throttle Interval IPC-281 Assigning a Password for an Interface Setting the Hello MultiplierSpecifying Designated Router Election Specifying the Interface Circuit Type Limiting LSP Flooding Configuring Mesh GroupsBlocking Flooding on Specific Interfaces IPC-283 Generating a Default Route Miscellaneous IS-IS Parameters Configuration Task ListForces a default route into the IS-IS routing domain Specifying the System Type Setting the Overload Bit Configuring IS-IS Authentication PasswordsSummarizing Address Ranges IPC-285 Routerconfig-router# set-overload-bit Tuning LSP Interval and LifetimeChanging the Routing Level for an Area Sets the overload bit Partial Route Computation PRC Router Config-router# max-lsp-lifetimeSets the LSP refresh interval Router’s database without being refreshed IPC-288 Modifying the Output of show Commands Enabling IS-IS Configuration Example IS-IS Configuration ExamplesMonitoring IS-IS IPC-289 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 Configuring BGP Neighbors Configuring Basic BGP FeaturesEnabling BGP Routing IPC-297 Capability Policy updates without modification Type of Reset Advantages DisadvantagesManaging Routing Policy Changes Is memory-intensive 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 Disables synchronization between BGP and an IGP Configuring BGP Interactions with IGPsTimer Starts Wakeups IPC-302 IPC-303 Configuring BGP WeightsDisabling Autonomous System Path Comparison IPC-304 Configuring BGP Route Filtering by NeighborConfiguring BGP Filtering Using Prefix Lists Creating a Prefix List How the System Filters Traffic by Prefix ListArgument Removes a prefix list with the name specified for list-name To the entry Configuring a Prefix List EntryIPC-306 Len ge-value = le-value = IPC-307 Deleting a Prefix List or Prefix List EntriesDisplaying Prefix Entries Disabling Next Hop Processing on BGP Updates Configuring BGP Path Filtering by NeighborClearing the Hit Count Table of Prefix List Entries IPC-308 Disabling Next Hop Processing Using a Route Map Disabling Next Hop Processing Using a Specific AddressConfiguring BGP Next Hop Propagation IPC-309 IPC-310 Configuring the BGP VersionConfiguring the MED Metric Using Route Maps to Modify Updates Configuring Advanced BGP FeaturesResetting eBGP Connections Immediately upon Link Failure Configuring Aggregate Addresses IPC-312 Configuring BGP Community FilteringDisabling Automatic Summarization of Network Numbers IPC-313 IPC-314 Configuring BGP Conditional AdvertisementSpecifying the Format for the Community Conditional Advertisement of a Set of Routes BGP Conditional Advertisement Configuration Task ListVerifying BGP Conditional Advertisement IPC-315 BGP Conditional Advertisement Troubleshooting Tips Configuring a Routing Domain ConfederationConfigures a BGP confederation IPC-316 Specifies the autonomous systems that belong to Configuring a Route ReflectorConfederation IPC-317 Simple BGP Model with a Route Reflector IPC-318 Configures the cluster ID Configures the local router as a BGP route reflectorRouterconfig-router# bgp cluster-id cluster-id Specified neighbor as a client Routerconfig-router# neighbor peer-group-name Configuring BGP Peer GroupsCreating the Peer Group Creates a BGP 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 New Behavior Old BehaviorIPC-323 000307 %TCP-6-BADAUTH No MD5 digest from 10.0.0.2179 to IPC-324 Disabling a Peer or Peer GroupMaking Neighbors Members of the Peer Group Adjusting BGP Timers Setting Administrative DistanceIndicating Backdoor Routes Modifying Parameters While Updating the IP Routing Table 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 Routerconfig# bgp dampening half-life reuse Changes the default values of route dampening factorsMonitoring and Maintaining BGP Route Dampening IPC-330 Clears route dampening information and unsuppresses Monitoring and Maintaining BGPSuppressed routes IPC-331 IPC-332 BGP Configuration ExamplesLogging Changes in Neighbor Status IPC-333 BGP Route Map ExamplesRouter bgp Neighbor 1.1.1.1 route-map freddy out Router bgp Redistribute igrp 109 route-map igrp2bgp Set automatic-tag Ip as-path access-list 1 permit Set local-preference 25 set metric Set weightAccess-list 2 permit 0.0.0.0 IPC-334 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 IPC-337 BGP Prefix List Filtering ExamplesIp prefix-list abc deny 0.0.0.0/0 Ip prefix-list abc permit 35.0.0.0/8 IPC-338 Dynamic Inbound Soft Reset Example BGP Soft Reset ExamplesInbound Soft Reset Using Stored Information Example Added or Deleted Prefix List Entries Examples 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 IBGP Peer Group Example BGP Peer Group ExamplesEBGP Peer Group Example IPC-345 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 multiprotocol BGP routes into Dvmrp with a Redistributing Dvmrp Routes into Multiprotocol BGPRedistributed Redistributes Dvmrp routes into multiprotocol BGP IPC-356 Configuring a Multiprotocol BGP Route ReflectorConfiguring Aggregate Multiprotocol BGP Addresses Configures an aggregate address with various Verifying Multiprotocol BGP Configuration and OperationOptions IPC-357 IPC-358 Multiprotocol BGP Configuration ExamplesDatabase information Multiprotocol BGP Peer Group Examples Multiprotocol BGP Peer ExamplesIPC-359 Neighbor 10.1.1.1 activate Multiprotocol BGP Route Map Examples Multiprotocol BGP Network Advertisement ExamplesMultiprotocol BGP Route Redistribute Examples IPC-360 Aggregate Multiprotocol BGP Address Examples Multiprotocol BGP Route Reflector ExamplesIPC-361 Aggregate-address 172.16.0.0 255.0.0.0 as-set IPC-362 IPC-363 Configuring IP Routing Protocol-Independent FeaturesProtocol-Independent Feature Task List Configuring Static Routes Using Variable-Length Subnet MasksRoute Source Default Distance IPC-364 IPC-365 Specifying Default RoutesSpecifying a Default Network Changing the Maximum Number of Paths Configuring Multi-Interface Load SplittingUnderstanding Gateway of Last Resort IPC-366 IPC-367 Redistributing Routing Information IPC-368 IPC-369 Understanding Supported Metric Translations Suppresses the sending of routing updates through Preventing Routing Updates Through an InterfaceFiltering Routing Information Specified interface IPC-371 Configuring Default Passive Interfaces Controlling the Processing of Routing Updates Controlling the Advertising of Routes in Routing UpdatesFiltering Sources of Routing Information IPC-372 Enabling Policy Routing PBR Defines a route map to control where packets are outputIdentifies the route map to use for policy routing IPC-373 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 Displays all route maps configured or only the one Displays authentication key informationVariable-Length Subnet Mask Example Specified Overriding Static Routes with Dynamic Protocols Example Administrative Distance ExamplesIPC-380 Ip route 10.0.0.0 255.0.0.0 172.18.3.4 Static Routing Redistribution Example Access-list 3 permitIgrp Redistribution Example IPC-381 IPC-382 RIP and Igrp Redistribution ExampleEigrp Redistribution Examples RIP and Eigrp Redistribution Examples Configuration for router R1 router bgp NetworkSimple Redistribution Example Complex 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 Following configuration Igrp autonomous system 1 is on Following configuration, Ospf is on networkIPC-389 Area 10.0.0.0 range 10.0.0.0 IPC-390 Default Metric Values Redistribution ExamplePolicy Routing Route Map Examples IPC-391 Passive-interface ethernet 1 neighbor Passive Interface ExamplesIPC-392 Policy Routing Example Default Passive Interface ExampleIPC-393 No ip directed-broadcast Interface Serial Set default interface null0 Following example configures a key chain named treesIp rip authentication key-chain trees media-type 10BaseT Key Management Examples 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 Enabling IP Multicast Routing Enabling Dense ModeEnabling PIM on an Interface IPC-403 Enabling Sparse-Dense Mode Enabling Sparse ModeEnables PIM dense mode on the interface Enables PIM sparse mode on the interface IPC-405 Configuring PIM Dense Mode State Refresh Configuring a Rendezvous Point Configuring Auto-RPConfigures the address of a PIM RP IPC-406 Adding Auto-RP to an Existing Sparse Mode Cloud Setting Up Auto-RP in a New InternetworkChoosing a Default RP Announcing the RP and the Group Range It Serves Verifying the Group-to-RP Mapping Filtering Incoming RP Announcement MessagesStarting to Use IP Multicast Preventing Join Messages to False RPs Configuring a Router to Be a Member of a Group Igmp Features Configuration Task ListControlling Access to IP Multicast Groups IPC-409 Routers That Run Igmp Version Changing the Igmp VersionSelects the Igmp version that the router uses Igmp host-query messages IPC-411 Configuring Igmp VersionSets the Igmp query timeout IPC-412 Restrictions Configuring the Router as a Statically Connected Member Changing the Igmp Query TimeoutRouterconfig-if# ip igmp Changing the Maximum Query Response Time Configures the interval at which the router sends Igmp Configuring Igmp Leave LatencyConfigures the number of times that the router sends Igmp Group-specific or group-source-specific with IGMPv3 query Disabling Fast Switching of IP Multicast Configuring the TTL ThresholdSAP Listener Support Configuration Task List Enabling SAP Listener Support Limiting How Long a SAP Cache Entry Exists Routerconfig-if# ip sap listenAnnouncements IPC-416 IPC-417 Configuring PIM VersionFunctional address IPC-418 PIM Version 2 Configuration Task ListPrerequisites Configuring PIM Sparse-Dense Mode Configuring PIM Version 2 OnlyDefining a PIM Sparse Mode Domain Border Interface Specifying the PIM Version IPC-420 Configuring Candidate BSRsConfiguring Candidate RPs Configures the router to be a candidate RP Deciding When to Configure a BSRMaking the Transition to PIM Version IPC-421 Dense Mode Advanced PIM Features Configuration Task ListSparse Mode Monitoring the RP Mapping Information Shared Tree and Source Tree Shortest-Path Tree IPC-423 Understanding Reverse Path Forwarding Delaying the Use of PIM Shortest-Path TreeShortest-path tree IPC-424 Increasing Control over RPs Assigning an RP to Multicast GroupsModifying the PIM Router Query Message Interval IPC-425 IPC-426 Understanding the PIM Registering ProcessPIM Version 1 Compatibility Limiting the Rate of PIM Register Messages Configuring the IP Source Address of Register MessagesEnabling Proxy Registering IPC-427 Enables PIM Nbma mode Enabling PIM Nonbroadcast Multiaccess ModeRouterconfig-if# ip pim nbma-mode IPC-428 IPC-429 Configuring an IP Multicast Static Route Configures an IP multicast static route Configuring RTP Header CompressionControlling the Transmission Rate to a Multicast Group Controls 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 How the Idling Policy Works Idling PolicyKeeping VCs from Idling Idled IPC-438 Configuring an IP Multicast BoundaryConfiguring an Intermediate IP Multicast Helper IPC-439 Storing IP Multicast Headers Use the show ip mpacket Exec command to display the buffer Configuring Stub IP Multicast RoutingEnables Cgmp Enabling Cgmp IPC-441 Specified access listMessages to the specified IP address on a central router Enabling Load Splitting Across Tunnels Enabling Native Load SplittingEqual-cost paths IPC-442 IPC-443 Configuring the Access RouterConfiguring the Router at the Opposite End of the Tunnel IPC-444 Configuring Both Routers to RPF IPC-445 Verifying the Load SplittingTunnel0 Serial1 IPC-446 IPC-447 Using IP Multicast Heartbeat PIM Dense Mode Example IP Multicast Configuration ExamplesPIM Sparse Mode Example IPC-448 BSR Configuration Example PIM Dense Mode State Refresh ExamplePIM Version 2 Examples This section provides examples in the following sections RFC 2362 Interoperable Candidate RP Example Border Router Configuration ExampleIPC-450 Ip pim sparse-dense-mode Router ospf IPC-451 RTP Header Compression Examples No keepalive Clockrate IPC-452No ip route-cache Interface Ethernet2/1 Interface Serial4/0 IPC-453 Password lab login No scheduler max-task-time endVersion Ip route-cache IPC-454 IP Multicast over ATM Point-to-Multipoint VC Example IP Multicast Helper Example Administratively Scoped Boundary ExampleIPC-455 Atm pvc 2 0 16 ilmi Router C-Last Hop Router Configuration Router A-First Hop Router ConfigurationStub IP Multicast Example IPC-456 IP Multicast Load Splitting Across Equal-Cost Paths IPC-457 IPC-458 IP Multicast Heartbeat ExampleIp address 100.1.3.3 255.255.255.0 bandwidth Clock rate Ip multicast heartbeat ethernet0 224.1.1.1 1 1 IPC-459 Configuring Source Specific MulticastSSM Components Overview SSM IP Address Range How SSM Differs from Internet Standard MulticastSSM Operations IPC-460 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 Easy to Install and Manage Denial of Service Attacks from Unwanted Sources InhibitedBenefits IP Multicast Address Management Not Required Legacy Applications Within the SSM Range Restrictions Ideal for Internet Broadcast ApplicationsIgmp v3lite and URD Require a Cisco IOS Last Hop Router Address Management Restrictions Igmp Snooping and Cgmp Limitations State Maintenance LimitationsURD Intercept URL Limitations Hsil Limitations Configuring SSM SSM Configuration Task ListMonitoring SSM IPC-467 SSM with IGMPv3 Example SSM Configuration ExamplesSSM with Igmp v3lite and URD Example SSM Filtering Example IPC-469 IPC-470 IPC-471 Configuring Bidirectional PIMBidir-PIM Overview Unidirectional Shared Tree and Source Tree IPC-472 IPC-473 DF Election Bidirectional Group Tree Building Bidir-PIM Configuration Task ListPacket Forwarding IPC-474 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 Requesting Source Information from an Msdp Peer Configured, this command provides nothingControlling Source Information That Your Router Originates Redistributing Sources Controlling Source Information That Your Router Forwards Using an Msdp FilterFiltering SA Request Messages IPC-482 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 Configures the router on the border between a dense mode Including a Bordering PIM Dense Mode Region in MsdpSparse mode region to send SA messages about active sources Dense mode region. The IP address of the interface is used IPC-487 Monitoring and Maintaining Msdp Default Msdp Peer Msdp Configuration ExamplesLogical RP IPC-488 IPC-489 RouterA Configuration No shutdown Router ospf RouterB ConfigurationIPC-490 IPC-491 RouterE ConfigurationNo shutdown Interface Loopback10 Hostname RouterE Ip routing 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 Enabling PGM Host with a Virtual Host Interface Verifying PGM Host ConfigurationEnabling PGM Host with a Physical Interface IPC-496 IPC-497 IPC-498 PGM Router Assist Configuration Task ListEnabling PGM Router Assist Enabling PGM Router Assist with a Virtual Host Interface Monitoring and Maintaining PGM HostEnabling PGM Router Assist with a Physical Interface IPC-499 IPC-500 PGM Host and Router Assist Configuration ExamplesMonitoring and Maintaining PGM Router Assist PGM Host with a Physical Interface Example PGM Host with a Virtual Interface ExampleIPC-501 Ip pgm host Interface vif1 PGM Router Assist with a Physical Interface Example PGM Router Assist with a Virtual Interface ExampleIPC-502 Ip pgm router IPC-503 IPC-504 IPC-505 Configuring Unidirectional Link RoutingUdlr Overview IPC-506 Udlr Tunnel IPC-507 Igmp Proxy Configuring Udlr Tunnel Udlr Tunnel Configuration Task ListPrerequisite IPC-508 IPC-509 Configuring the Igmp UDL Igmp Udlr Configuration Task ListConfigures Igmp on the interface to be unidirectional UDL interface Changing the Distance for the Default RPF Interface Igmp Proxy Configuration Task ListMonitoring Igmp Udlr Displays Udlr information for directly connected multicast IPC-512 Configuring Igmp ProxyVerifying Igmp Proxy Udlr Tunnel Example Udlr Configuration ExamplesThis section provides the following Udlr examples IPC-513 Igmp Udlr Example Configure tunnel as send-only Udlr tunnelIPC-514 Ip multicast-routing Serial1 has receive-only capability IPC-515 Uplink Router uplink-rtr ConfigurationDownlink Router downlink-rtr Configuration IPC-516 Igmp Proxy Example Ip igmp unidirectional link IPC-517 Integrated Udlr Tunnel, Igmp UDLR, and Igmp Proxy Example Upstream ConfigurationIPC-518 Ip multicast-routing Interface Tunnel0 No cdp enable Downstream ConfigurationIPC-519 Ip pim sparse-mode Ip igmp unidirectional-link IPC-520 IPC-521 Using IP Multicast ToolsMulticast Routing Monitor Overview Configuring a Test Sender and Test Receiver MRM Configuration Task ListRestrictions IPC-522 IPC-523 Monitoring Multiple Groups IPC-524 Configuring a ManagerConducting an MRM Test IPC-525 Monitoring IP Multicast RoutingMonitoring and Maintaining MRM Test Sender Configuration MRM Configuration ExampleTest Receiver Configuration Manager 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 Rgmp and enters interface configuration mode Verifying Rgmp ConfigurationEnables Rgmp on a specified interface Enabling Rgmp IPC-533 Monitoring and Maintaining Rgmp IPC-534 Rgmp Configuration Example Switch B Configuration Switch a ConfigurationSwitch enable set igmp enable Switch enable set rgmp enable IPC-535 IPC-536 IPC-537 Configuring Dvmrp InteroperabilityBasic Dvmrp Interoperability Configuration Task List Responding to mrinfo Requests Configuring Dvmrp InteroperabilityDvmrp reports Injected into Dvmrp IPC-539 Configuring a Dvmrp Tunnel Enabling Dvmrp Unicast Routing Advertising Network 0.0.0.0 to Dvmrp NeighborsAdvertises network 0.0.0.0 to Dvmrp neighbors IPC-540 Enables Dvmrp unicast routing Configuring a Dvmrp Summary AddressLimiting the Number of Dvmrp Routes Advertised Changing the Dvmrp Route Threshold Disabling Dvmrp Automatic summarization Disables Dvmrp automatic summarizationAdding a Metric Offset to the Dvmrp Route Specifies a Dvmrp summary address IPC-543 Rejecting a Dvmrp Nonpruning Neighbor IPC-544 Configuring a Delay Between Dvrmp ReportsPrevents peering with nonpruning Dvmrp neighbors Monitoring and Maintaining Dvmrp Dvmrp Configuration ExamplesDvmrp Interoperability Example Dvmrp Tunnel 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 Index

Models: 78-11741-02

Index