"reset ip arp table" is not flushing all the entries present in the table (interface and address option works):
vyos@vyos:~$ sh arp Address Interface Link layer address State ------------- ----------- -------------------- --------- 192.168.255.1 eth1 2a:2f:a3:e9:59:d6 STALE 192.0.2.2 eth0 50:0b:00:16:00:00 REACHABLE vyos@vyos:~$ vyos@vyos:~$ reset ip arp Possible completions: address Reset ARP cache for an IPv4 address interface Reset ARP cache for interface table Flush the ARP cache completely vyos@vyos:~$ reset ip arp table vyos@vyos:~$ sh arp Address Interface Link layer address State ------------- ----------- -------------------- --------- 192.168.255.1 eth1 2a:2f:a3:e9:59:d6 STALE 192.0.2.2 eth0 50:0b:00:16:00:00 REACHABLE