Linux下查看arp静态绑定地址

时间：2007-02-12 来源：cocacoder

首先，做两个对比试验： root@janbe root]# arp -a
? (192.168.8.241) at 00:15:58:A2:13: D0 [ether] on eth0
? (192.168.8.1) at 00:15:C5:E1: D1:58 [ether] on eth0
[root@janbe bin]# arp -s 192.168.8.1 00:15:C5:E1: D1:58
[root@janbe bin]# arp -a
? (192.168.8.241) at 00:15:58:A2:13: D0 [ether] on eth0
? (192.168.8.1) at 00:15:C5:E1: D1:58 [ether] PERM on eth0
发现没有？多了一个PERM！！

或者
[root@janbe bin]# cat /proc/net/arp
IP address    HW type    Flags    HW address          Mask    Device
192.168.8.241 0x1       0x2       00:15:58:A2:13: D0    *       eth0
192.168.8.1    0x1       0x6       00:15:C5:E1: D1:58    *       eth0
[root@janbe bin]# arp -s 192.168.8.241 00:15:58:A2:13: D0
[root@janbe bin]# cat /proc/net/arp
IP address    HW type    Flags    HW address          Mask    Device
192.168.8.241 0x1       0x6       00:15:58:A2:13: D0    *       eth0
192.168.8.1    0x1       0x6       00:15:C5:E1: D1:58    *       eth0 发现没有？Flags改变了！所以我们可以用两种方法找到arp的静态绑定地址：＃arp -a | grep PERM   或者＃cat /proc/net/arp | grep 0x6 但建议用后者比较快。

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