还是OSPF在帧中继环境下的问题
很简单的一个拓扑，听完耿叔的视频自己敲的时候发现的路由表挺全的，可是R2ping不通R3，为什么啊？
路由表里有路由，为什么呢？
R1#
R1#sh ip rou
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 via 10.10.254.2, 00:01:00, Serial0/1
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 via 10.10.254.3, 00:01:00, Serial0/1
10.0.0.0/24 is subnetted, 1 subnets
C 10.10.254.0 is directly connected, Serial0/1
R2#
R2#sh ip rou
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 via 10.10.254.1, 00:00:22, Serial0/2
2.0.0.0/24 is subnetted, 1 subnets
C 2.2.2.0 is directly connected, Loopback0
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 via 10.10.254.3, 00:00:22, Serial0/2
10.0.0.0/24 is subnetted, 1 subnets
C 10.10.254.0 is directly connected, Serial0/2
R2#ping 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
....
Success rate is 0 percent (0/4)
R2#ping 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!
R3#
R3#sh ip rou
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 via 10.10.254.1, 00:02:02, Serial0/3
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 via 10.10.254.2, 00:02:02, Serial0/3
3.0.0.0/24 is subnetted, 1 subnets
C 3.3.3.0 is directly connected, Loopback0
10.0.0.0/24 is subnetted, 1 subnets
C 10.10.254.0 is directly connected, Serial0/3
R3#ping 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 24/49/88 ms
R3#ping 2.2.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R3#
1、R2与R3之间都有对方的路由，这意味着什么？
2、R2与R3之间都有对方的路由，说明三层构造IP报文的信息有了，那么二层的信息呢？路由的下一跳是谁？有关于它的二层信息么？ tea 发表于 2013-10-17 09:25
1、R2与R3之间都有对方的路由，这意味着什么？
2、R2与R3之间都有对方的路由，说明三层构造IP报文的信息有 ...
叔，你回答速度太快了，我刚上论坛发现那么多问题，你居然已经在回答了。
目测没有到达R3帧中继接口的MAP映射，这个映射类似于二层信息，在数据包封装的时候需要使用，而且是双向的。
方便的话把每台设备的show frame map洒出来瞅瞅就知道了。
thx your post 小皮球 发表于 2013-10-17 09:34
叔，你回答速度太快了，我刚上论坛发现那么多问题，你居然已经在回答了。
{:soso_e112:}
tea 发表于 2013-10-17 09:25
1、R2与R3之间都有对方的路由，这意味着什么？
2、R2与R3之间都有对方的路由，说明三层构造IP报文的信息有 ...
谢谢朱sir，原来我昨晚为了一座空中楼阁忙活了一夜啊！
一语点醒，Thank you very much!{:soso_e110:}
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