arping命令用法

arping命令使用说明

BusyBox v1.17.3 (2011-07-20 17:01:30 CST) multi-call binary.

Usage: arping [-fqbDUA] [-c CNT] [-w TIMEOUT] [-I IFACE] [-s SRC_IP] DST_IP

Send ARP requests/replies

Options:
-f Quit on first ARP reply
-q Quiet
-b Keep broadcasting, don't go unicast
-D Duplicated address detection mode
-U Unsolicited ARP mode, update your neighbors
-A ARP answer mode, update your neighbors
-c N Stop after sending N ARP requests
-w TIMEOUT Time to wait for ARP reply, seconds
-I IFACE Interface to use (default eth0)
-s SRC_IP Sender IP address
DST_IP Target IP address

例如，要将接口ip广播给对端，可以发送免费arp请求，arping -I ethX -s  x.x.x.x  x.x.x.x，如命令中两个接口ip相同，即为发送免费arp请求；

同样，也可以用接口源ip去请求网关ip，避免对端学不到本端接口ip，命令 arping -I ethX -s x.x.x.x(接口ip) x.x.x.x(对端网关ip)

如要进行自动广播，可以考虑将命令写入到shell脚本中，如下：

#!/bin/sh

arping -I eth0 -c 1 -s 2.2.2.2 2.2.2.1 >/dev/null