思科路由器数据长度较大时ping不通

saagzois

我在做IP分片的实验，链路上最小的MTU是700，我发送长度为800的数据包时显示是可以ping通的：

1. R1#ping 192.34.5.1 size 800 source 192.34.4.1
   
2. 
   
3. Type escape sequence to abort.
   
4. Sending 5, 800-byte ICMP Echos to 192.34.5.1, timeout is 2 seconds:
   
5. Packet sent with a source address of 192.34.4.1
   
6. !!!!!
   
7. Success rate is 100 percent (5/5), round-trip min/avg/max = 44/80/200 ms
   
8. R1#

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但是发送大小为900的数据包时就不通了，显示超时：

1. R1#ping 192.34.5.1 size 900 source 192.34.4.1
   
2. 
   
3. Type escape sequence to abort.
   
4. Sending 5, 900-byte ICMP Echos to 192.34.5.1, timeout is 2 seconds:
   
5. Packet sent with a source address of 192.34.4.1
   
6. .....
   
7. Success rate is 0 percent (0/5)

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这是什么情况啊，很急很急，在线等。。。

mnnad

check the routing table on both side!

f1662

f1662

zhongta