关于EBGP的问题

xzx1943 · 发表于 2010-7-26 13:29:33

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 [20/0] via 12.12.12.2, 00:07:56
B    1.1.3.0 [20/0] 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 [20/0] via 12.12.12.1, 00:05:06
B    1.1.1.0 [20/0] via 12.12.12.1, 00:05:06
B    1.1.2.0 [20/0] via 23.23.23.2, 00:00:19
B    1.1.3.0 [20/0] 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 [20/0] via 23.23.23.1, 00:08:36
B    1.1.1.0 [20/0] 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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