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ICND210S05L02

EIGRP EIGRP

故障排除

EIGRP 实施

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EIGRP 故障排除的组成部分

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EIGRP 邻居问题的故障排除

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EIGRP 路由表故障排除

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EIGRP 身份验证故障排除

RouterX 与RouterY 之间成功的MD5 身份验证

RouterX#debug eigrp packets

EIGRP Packets debugging is on (UPDATE, REQUEST, QUERY, REPLY, HELLO, IPXSAP, PROBE, ACK, STUB, SIAQUERY, SIAREPLY)*Jan 21 16:38:51.745:EIGRP:received packet with MD5 authentication, key id = 1*Jan 21 16:38:51.745:EIGRP:Received HELLO on Serial0/0/1 nbr 192.168.1.102*Jan 21 16:38:51.745:AS 100, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 pe erQ un/rely 0/0R t Y#d b i k t RouterY#debug eigrp packets EIGRP Packets debugging is on

(UPDATE, REQUEST, QUERY, REPLY, HELLO, IPXSAP, PROBE, ACK, STUB, SIAQUERY, SIAREPLY)RouterY#

*Jan 21 16:38:38.321:EIGRP:received packet with MD5 authentication, key id = 2*Jan 21 16:38:38.321:EIGRP:Received HELLO on Serial0/0/1 nbr 192.168.1.101*Jan 21 16:38:38.321:AS 100, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 pe erQ un/rely 0/0

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排除EIGRP 身份验证问题

RouterX 的密钥2 改变时,RouterX 与RouterY 之间MD5 身份验证不成功

RouterX(config-if)#key chain RouterXchain RouterX(config-if)#key chain RouterXchain RouterX(config-keychain)#key 2

RouterX(config-keychain-key)#key-string wrongkey

RouterY#debug eigrp packets g g p p EIGRP Packets debugging is on

(UPDATE, REQUEST, QUERY, REPLY, HELLO, IPXSAP, PROBE, ACK, STUB, SIAQUERY, SIAREPLY)RouterY#

*Jan 21 16:50:18.749: EIGRP: pkt key id = 2, authentication mismatch

*Jan 21 16:50:18.749: EIGRP: Serial0/0/1: ignored packet from 192.168.1.101, opc ode = 5 (invalid authentication)

*Jan 21 16:50:18.749: EIGRP: Dropping peer, invalid authentication *Jan 21 16:50:18.749: EIGRP: Sending HELLO on Serial0/0/1*Jan 2116:50:18749:AS 100Flags 0x0Seq 0/0idbQ 0/0iidbQ un/rely 0/0*Jan 21 16:50:18.749: AS 100, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0*Jan 21 16:50:18.753: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.101(Serial0/0/1) is down: Auth failure RouterY#show ip eigrp neighbors #p g p g

IP-EIGRP neighbors for process 100RouterY#

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可视目标5-2:EIGRP 故障排除

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总结

EIGRP 的故障排除涉及几个方面,例如解决邻居关系问题、路由表问题和身份验证问题。

导致h ll EIGRP 邻居问题的原因包括错误的网络命令和hello 数据包

信息不匹配。使用show ip eigrp neighbors 命令有助于排除这些问题。 路由表中丢失EIGRP 路由的原因可能是路由过滤或不连续网络中的自动总结。使用show ip route 命令有助于排除这些问题。身份验证问题

degub eigrp packets 命令可帮助您排除MD5身份验证问题。w w w .c w n p c h i n a .o r g

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