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  1. RIP packetlife.net RIP Implementations AttributesRIPv1 Type Distance VectorOriginal RIP implementation, limited to classful routing Algorithm Bellman-Ford(obsolete)RIPv2 Admin Distance 120Introduced support for classless routing, authentication, Metric Hop count (max 15)triggered updates, and multicast announcements (RFC 2453) Standard RFCs 2080, 2453RIPng (RIP Next Generation)Extends RIPv2 to support IPv6 routing (RFC 2080); functions Protocols IPv4, IPv6very similarly to RIPv2 and is subsequently as limited Transport UDP Protocols Comparison Authentication Plaintext, MD5 RIPv1 RIPv2 RIPng Multicast IP 224.0.0.9/FF02::9 IP IPv4 IPv4 IPv6 Terminology Admin Distance 120 120 120 Split Horizon UDP Port 520 520 521 A rule that states a router may not advertise a route back to the neighbor from which it was learned Classless No Yes Yes Route Poisoning Adv. Address Broadcast 224.0.0.9 FF02::9 When a network becomes unreachable, an Authentication None Plain, MD5 None update with an infinite metric is generated to explicitly advertise the route as unreachable RIPv2 Configuration Poison Reverse A router advertises a network as unreachable! Enable RIPv2 IPv4 routing through the interface on which it was learnedrouter rip version 2 Timer Defaults ! Disable RIPv2 automatic summarization Update 30 sec Flush 240 sec no auto-summary Invalid 180 sec Hold-down 180 sec ! Designate RIPv2 interfaces by network network network RIPv2 Interface Configuration ! Identify unicast-only neighbors ! Configure manual route summarization neighbor IP-address ip summary-address rip network mask ! Originate a default route ! Enable MD5 authentication (RIPv2 only) default-information originate ip rip authentication mode md5 ip rip authentication key-chain key-chain ! Designate passive interfaces passive-interface {interface | default} RIPng Interface Configuration ! Modify timers ! Enable RIPng on the interface timers basic update invalid hold flush ipv6 rip name enable RIPng Configuration ! Configure manual route summarization ipv6 rip name summary-address prefix! Enable IPv6 routingipv6 unicast-routing Troubleshooting! Enable RIPng IPv6 routing show ip[v6] protocolsipv6 router rip name show ip[v6] rip database ! Toggle split-horizon and poison-reverse show ip[v6] route rip [no] split-horizon [no] poison-reverse debug ip rip { database | events } ! Modify timers debug ipv6 rip [interface] timers basic update invalid hold flushby Jeremy Stretch v1.1

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