xzx1943 发表于 2010-7-26 13:29:33

关于EBGP的问题



这个图~起完BGP以后为什么在R3上PING不通R1的LOOKBACK口?
EBGP都是用直连接口,没有用LOOKBACK口做跟新源,R3上能学到R1的LOOKBACK口的路由,R1也能学到R3的,
R1的路由表:
Gateway of last resort is not set
   1.0.0.0/24 is subnetted, 4 subnets
C       1.1.0.0 is directly connected, Loopback0
C       1.1.1.0 is directly connected, Loopback1
B       1.1.2.0 via 12.12.12.2, 00:07:56
B       1.1.3.0 via 12.12.12.2, 00:07:56
   12.0.0.0/30 is subnetted, 1 subnets
C       12.12.12.0 is directly connected, Serial1/1

R2路由表:
Gateway of last resort is not set
   1.0.0.0/24 is subnetted, 4 subnets
B       1.1.0.0 via 12.12.12.1, 00:05:06
B       1.1.1.0 via 12.12.12.1, 00:05:06
B       1.1.2.0 via 23.23.23.2, 00:00:19
B       1.1.3.0 via 23.23.23.2, 00:00:19
   23.0.0.0/30 is subnetted, 1 subnets
C       23.23.23.0 is directly connected, Serial1/1
   24.0.0.0/30 is subnetted, 1 subnets
C       24.24.24.0 is directly connected, Serial1/2
   12.0.0.0/30 is subnetted, 1 subnets
C       12.12.12.0 is directly connected, Serial1/0

R3路由表:
Gateway of last resort is not set
   1.0.0.0/24 is subnetted, 4 subnets
B       1.1.0.0 via 23.23.23.1, 00:08:36
B       1.1.1.0 via 23.23.23.1, 00:08:36
C       1.1.2.0 is directly connected, Loopback0
C       1.1.3.0 is directly connected, Loopback1
   23.0.0.0/30 is subnetted, 1 subnets
C       23.23.23.0 is directly connected, Serial1/0

linda.! 发表于 2010-7-26 16:32:30

你要用扩展ping
R3#ping 1.1.0.1 source lo0

因为默认,ping 1.1.0.1 ,源IP是出口的IP地址,即是23.23.23.3,而R1路由表中没有到23.23.23.0/24的路由,所以,ping不通!

xzx1943 发表于 2010-7-26 20:13:56

恩~~用扩展PING的话就通了~~~

34245225 发表于 2010-7-28 15:15:55

111111111111111111111111

34245225 发表于 2010-7-28 15:20:45

4444444444

34245225 发表于 2010-7-28 15:29:46

55555555555555555

34245225 发表于 2010-7-28 15:35:34

6666666666666666

34245225 发表于 2010-7-28 16:17:27

99999999999999999999999

笨鸟 发表于 2010-8-11 20:59:08

飘过~~~顺便刷个金币

20100 发表于 2010-8-16 10:53:29

不错。今天我到此一逛,望回访!
            我顶!
             不错啊,
             好啊,嘿嘿!









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