1、针对目标mac开启debug

IAP# debug pkt match Mac aa:bb:cc:dd:ee:ff

2、debug 对应类型的报文

IAP# debug pkt type  ?
<type1>     arp/pppoe/apmsg/icmp/icmpv6/igmp/tcp/udp/gre/dhcp/dhcpv6/dns/radius/http/https/echo/nd/rd/mld/mobility/beacon/all

IAP#debug pkt type arp

3、查看debug的信息

IAP# show debug pkt
Enter 'debug pkt dump' to dump packets on console
OR 'debug pkt mirror <ip>' to mirror them
If source or destination MAC is aa:bb:cc:dd:ee:ff
AND packet is of type ARP

4、开启debug（建议提前用终端软件开启日志记录）

IAP# debug pkt dump

得到输出内容后，可以按q停止