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疑难解析:H3C 网络排错——RIP路由协议

作者:http://www.chinaunix.net 作者:ssffzz1  2008-05-05

  概述:

  RIP 协议,是一个距离矢量路由协议,采用跳数作为到达目的网络的度量标识,最大跳数为16 跳,即大于等于16 跳网络即为不可达。目前有RIP V1 和RIP V2 两个版本。由于最大跳数的限制,以及协议的其他原因,RIP 协议不适合用于大型网络。

  通告疑难:

  RIP 协议认证未启用-RIPV1 不支持认证

  如图1:在R1 和R2 间的路由器上配置了RIP 认证,发现无论如何配置密码均能通告路由。配置如下:

  R1:
  interface Serial0/0
  link-protocol ppp
  ip address 10.0.0.1 255.255.255.252
  rip authentication-mode simple h3c
  interface LoopBack0
  ip address 1.1.1.1 255.255.255.255
  rip
  network 0.0.0.0

  R2:
  interface Serial0/0
  clock DTECLK1
  link-protocol ppp
  ip address 10.0.0.2 255.255.255.252
  rip authentication-mode simple 123456
  interface LoopBack0
  ip address 2.2.2.2 255.255.255.255
  rip
  network 0.0.0.0

  通过查看R1 R2 的信息发现尽管密码配置错误,但是依然通告了路由:

  R1:
  [R1]dis rip interface
  RIP Interface: public net
  Address Interface Pro MetrIn/Out Input Output Split-horizon
  10.0.0.1 Serial0/0 RIP1 0/1 on on on
  1.1.1.1 LoopBack0 RIP1 0/1 off off on
  [R1]dis rip routing

  RIP routing table: public net
  A = Active I = Inactive G = Garbage collection
  C = Change T = Trigger RIP
  Destination/Mask Cost NextHop Age SourceGateway Att
  2.0.0.0/8 1 10.0.0.2 3s 10.0.0.2 A
  R2:
  [B]dis rip int

  RIP Interface: public net
  Address Interface Pro MetrIn/Out Input Output Split-horizon
  10.0.0.2 Serial0/0 RIP1 0/1 on on on
  2.2.2.2 LoopBack0 RIP1 0/1 off off on
  [B]dis rip rout

  RIP routing table: public net
  A = Active I = Inactive G = Garbage collection
  C = Change T = Trigger RIP
  Destination/Mask Cost NextHop Age SourceGateway Att
  1.0.0.0/8 1 10.0.0.1 20s 10.0.0.1 A
  rip
  network 0.0.0.0

  通过查看R1 R2 的信息发现尽管密码配置错误,但是依然通告了路由:

  R1:
  [R1]dis rip interface
  RIP Interface: public net
  Address Interface Pro MetrIn/Out Input Output Split-horizon
  10.0.0.1 Serial0/0 RIP1 0/1 on on on
  1.1.1.1 LoopBack0 RIP1 0/1 off off on
  [R1]dis rip routing

  RIP routing table: public net
  A = Active I = Inactive G = Garbage collection
  C = Change T = Trigger RIP
  Destination/Mask Cost NextHop Age SourceGateway Att
  2.0.0.0/8 1 10.0.0.2 3s 10.0.0.2 A
  R2:
  [B]dis rip int

  RIP Interface: public net
  Address Interface Pro MetrIn/Out Input Output Split-horizon
  10.0.0.2 Serial0/0 RIP1 0/1 on on on
  2.2.2.2 LoopBack0 RIP1 0/1 off off on
  [B]dis rip rout

  RIP routing table: public net
  A = Active I = Inactive G = Garbage collection
  C = Change T = Trigger RIP
  Destination/Mask Cost NextHop Age SourceGateway Att
  1.0.0.0/8 1 10.0.0.1 20s 10.0.0.1 A

  故障排除:通过查看接口发现在接口上运行的RIP V1 协议。而RIPV1 是不支持认证的,但是此时的密码却是可以配置的,在修正了配置并修改密码后排除了故障。

  R1:
  interface Serial0/0
  link-protocol ppp
  ip address 10.0.0.1 255.255.255.252
  rip authentication-mode simple h3c
  rip version 2 multicast

  R2:
  interface Serial0/0
  clock DTECLK1
  link-protocol ppp
  ip address 10.0.0.2 255.255.255.252
  rip authentication-mode simple h3c
  rip version 2 multicast

 

原文链接:http://bbs.chinaunix.net/viewthread.php?tid=1083378
转载请注明作者名及原文出处

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第3页: 在非广播链路上的RIP
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