路由器运行eigrp协议，丢失路由，求高手解答
本人刚学CCNA，用Cisco Packet Tracer5.3.2模拟器组了一个网，运行Eigrp协议，如图
r0-r2-r1-r3用光纤连
r0-r1用100M网线
r2-r3用串口线
开始pc0通ping 通pc1
当断开r2-r1的光纤后就ping不通了。必须要手动清一下r3的路由表。
是我的错还是模拟器的错？
期待高手解答，谢谢！
附件中是模拟器保存的文件 [attach]200744[/attach]
[attach]200743[/attach]
请问有没有这方面的资料，有的话麻烦给我发一份，不胜感激。可以把压缩包发我邮箱[email]506235454@qq.com[/email]
个人感觉和R2R3R1路由器的配置有关
我感觉你的静态路由应该检查一下，下一帧的指向，是否路由设置有问题
你试试在R1和R3之间做一个虚链路看看，估计是这个问题。
哎当年学的早都忘了，是不是动态路由没有更新的原因？换个路由协议看看？
与EIGRP的dead时间有关！！！！！ 你换成OSPF 可能好点 呵呵………………
包跟踪演示做过吗?不如做一个看看?
个人猜想,pc0-pc1的最短链路应该是全走的光纤
正常时：
PC>tracert 3.1.1.1
Tracing route to 3.1.1.1 over a maximum of 30 hops:
1 40 ms 40 ms 40 ms 2.1.1.254
2 60 ms 60 ms 60 ms 1.1.1.6
3 80 ms 80 ms 80 ms 1.1.1.10
4 100 ms 100 ms 100 ms 1.1.1.14
5 130 ms 140 ms 140 ms 3.1.1.1
Trace complete.
断开R1-R2：
PC>tracert 3.1.1.1
Tracing route to 3.1.1.1 over a maximum of 30 hops:
1 40 ms 40 ms 40 ms 2.1.1.254
2 60 ms 60 ms 60 ms 1.1.1.2
3 * * * Request timed out.
4 * * * Request timed out.
5 * * * Request timed out.
6 * * * Request timed out.
7 * *
Control-C
^C
PC>ping 3.1.1.1
Pinging 3.1.1.1 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 3.1.1.1:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
PC1>ping 2.1.1.1
Pinging 2.1.1.1 with 32 bytes of data:
Reply from 3.1.1.254: Destination host unreachable.
Reply from 3.1.1.254: Destination host unreachable.
Reply from 3.1.1.254: Destination host unreachable.
Reply from 3.1.1.254: Destination host unreachable.
Ping statistics for 2.1.1.1:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
PC>