IP-4-ZERO_ADDR: Zero MAC address for <ip> in ARP cache

[b.withrow]

Could someone hlep me with this log message: IP-4-ZERO_ADDR: Zero MAC address for <ip> in ARP cache

It just started appearing in our Cisco 10012 CMTS, and all of the documentation is very vague as to what it is and how to fix it. I'm hoping someone else has seen the message and can help clarify it's meaning. Thanks in advance!

[unicmd]

Your not the only one with these logs mess :

Jan 20 13:05:10: %IP-4-ZERO_ADDR: Zero MAC address for 10.100.xxx.69 in ARP cache

Jan 20 13:30:02: %IP-4-ZERO_ADDR: Zero MAC address for 10.100.xxx.69 in ARP cache

I thing the reason is that someone has a worm or something ping-flooding/scanning the network, check your arp table for incompletes.

What to do about it, disable icmp on the network maybe, for now we dont have a problem on the network but would be nice to fix this thing.

Martin

DK