tcpdump抓arp的包

tcpdump arp 没有抓到

[root@sdnhealthcheck ~]# tcpdump arp
dropped privs to tcpdump
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on lo2, link-type EN10MB (Ethernet), capture size 262144 bytes
  ^C
0 packets captured
0 packets received by filter

后加上具体的网卡后可以抓到
网卡为ens192

[root@sdnhealthcheck ~]# tcpdump arp -i ens192
dropped privs to tcpdump
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ens192, link-type EN10MB (Ethernet), capture size 262144 bytes
17:02:16.068822 ARP, Request who-has 10.248.224.5 tell 10.248.224.100, length 28
17:02:17.092849 ARP, Request who-has 10.248.224.5 tell 10.248.224.100, length 28
17:02:18.116881 ARP, Request who-has 10.248.224.5 tell 10.248.224.100, length 28
17:02:19.140830 ARP, Request who-has 10.248.224.5 tell 10.248.224.100, length 28
17:02:19.466014 ARP, Request who-has 10.248.224.5 (Broadcast) tell 10.248.224.100, length 46
17:02:19.466056 ARP, Request who-has 10.248.224.5 (Broadcast) tell 10.248.224.100, length 46
17:02:19.466058 ARP, Request who-has 10.248.224.5 (Broadcast) tell 10.248.224.100, length 46
17:02:20.164857 ARP, Request who-has 10.248.224.5 tell 10.248.224.100, length 28