通常是將實體網路更換 switch PORT 或是更換 IP 後,發現網路不通的狀況..
[root@pd920 ~]# arping 192.168.11.254 ARPING 192.168.11.254 from 220.130.131.239 eth0 Unicast reply from 192.168.11.254 [00:90:1A:82:83:FE] 41.405ms Unicast reply from 192.168.11.254 [00:90:1A:82:83:FE] 41.848ms Unicast reply from 192.168.11.254 [00:90:1A:82:83:FE] 41.642ms Unicast reply from 192.168.11.254 [00:90:1A:82:83:FE] 38.575ms Unicast reply from 192.168.11.254 [00:90:1A:82:83:FE] 39.111ms Sent 5 probes (1 broadcast(s)) Received 5 response(s)
[root@pd920 ~]# arp -a 220-130-131-254.HINET-IP.hinet.net (220.130.131.254) at 00:90:1A:82:83:FE [ether] on eth0 ? (192.168.11.254) at 00:90:1A:82:83:FE [ether] on eth0 www.ichiayi.com (220.130.131.240) at 00:13:74:00:5C:xx [ether] on eth0 vm-mail.ichiayi.com (192.168.11.236) at 00:0C:29:48:E8:13 [ether] on eth1