网络工程 - 无法在两个直接连接的路由器 (gns3) 之间 ping - 吾爱随笔录

几年前我对这些东西非常熟悉……但我想我可能忘记了一些基础知识。我正在 GNS3 中运行两个 NX-OS 映像。我已将两者配置为：

// Router 1
interface Ethernet2/1
  ip address 192.168.2.101/24
  no shutdown

和

// Router 2
interface Ethernet2/1
  ip address 192.168.2.102/24
  no shutdown

但是，我无法互相ping通。sh int status将链接显示为已连接：

Eth2/1 -- connected routed full 1000

ping 的结果是：

N7K-2(config)# ping 192.168.2.101
PING 192.168.2.101 (192.168.2.101): 56 data bytes
2016 Mar  7 03:58:21.792494 netstack: [3107] (default) Send packet on Ethernet2/1 (mbuf_prty 7): s=192.168.2.102, d=192.168.2.101, nh=192.168.2.101, proto=1 (icmp), ip_len=84, id=0c2b, ttl=255
2016 Mar  7 03:58:21.792524 netstack: [3107] (default) Send packet on Ethernet2/1 (mbuf_prty 7): s=192.168.2.102, d=192.168.2.101, proto=1 (icmp), ip_len=21504, id=2b0c, ttl=255
Request 0 timed out
2016 Mar  7 03:58:23.793836 netstack: [3107] (default) Send packet on Ethernet2/1 (mbuf_prty 7): s=192.168.2.102, d=192.168.2.101, nh=192.168.2.101, proto=1 (icmp), ip_len=84, id=0c2c, ttl=255
2016 Mar  7 03:58:23.793999 netstack: [3107] (default) Send packet on Ethernet2/1 (mbuf_prty 7): s=192.168.2.102, d=192.168.2.101, proto=1 (icmp), ip_len=21504, id=2c0c, ttl=255
Request 1 timed out
2016 Mar  7 03:58:25.795381 netstack: [3107] (default) Send packet on Ethernet2/1 (mbuf_prty 7): s=192.168.2.102, d=192.168.2.101, nh=192.168.2.101, proto=1 (icmp), ip_len=84, id=0c2d, ttl=255
2016 Mar  7 03:58:25.795544 netstack: [3107] (default) Send packet on Ethernet2/1 (mbuf_prty 7): s=192.168.2.102, d=192.168.2.101, proto=1 (icmp), ip_len=21504, id=2d0c, ttl=255
Request 2 timed out
2016 Mar  7 03:58:27.797338 netstack: [3107] (default) Send packet on Ethernet2/1 (mbuf_prty 7): s=192.168.2.102, d=192.168.2.101, nh=192.168.2.101, proto=1 (icmp), ip_len=84, id=0c2e, ttl=255
2016 Mar  7 03:58:27.797436 netstack: [3107] (default) Send packet on Ethernet2/1 (mbuf_prty 7): s=192.168.2.102, d=192.168.2.101, proto=1 (icmp), ip_len=21504, id=2e0c, ttl=255
Request 3 timed out
2016 Mar  7 03:58:29.798765 netstack: [3107] (default) Send packet on Ethernet2/1 (mbuf_prty 7): s=192.168.2.102, d=192.168.2.101, nh=192.168.2.101, proto=1 (icmp), ip_len=84, id=0c2f, ttl=255
2016 Mar  7 03:58:29.799104 netstack: [3107] (default) Send packet on Ethernet2/1 (mbuf_prty 7): s=192.168.2.102, d=192.168.2.101, proto=1 (icmp), ip_len=21504, id=2f0c, ttl=255
Request 4 timed out

--- 192.168.2.101 ping statistics ---
5 packets transmitted, 0 packets received, 100.00% packet loss

这并不奇怪，考虑show cdp neigh是空的。我就是不明白为什么。