linux系统下清空arp 缓存(清空arp表)方法     系统初始arp环境 [root@esx ~]# arp -n
Address                  HWtype  HWaddress             Flags Mask            Iface
192.168.1.175           ether   00:24:1D:97:B6:7F         C                           vswif0
192.168.1.120           ether   00:1F:C6:3A:DC:81       C                           vswif0
192.168.1.51             (incomplete)                                                           vswif0   执行清除所有arp 缓存命令
[root@esx ~]# arp -n|awk '/^[1-9]/{print "arp -d  " $1}'|sh -x
+ arp -d 192.168.1.175
+ arp -d 192.168.1.120
+ arp -d 192.168.1.51     执行命令后，本机arp缓存信息
[root@esx ~]# arp -n
Address                  HWtype  HWaddress           Flags Mask            Iface
192.168.1.175           (incomplete)                                                           vswif0
192.168.1.120           (incomplete)                                                           vswif0
192.168.1.51              (incomplete)                                                          vswif0