IP-4-ZERO_ADDR:

[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!

[pkhatri]

Hi,

According to Cisco:

%IP-4-ZERO_ADDR : Zero MAC address for [IP_address] in ARP cache

Explanation An entry in the ARP cache has a null MAC address.

Recommended Action If this message recurs, copy the error message exactly as it appears on the console or in the system log, contact your Cisco technical support representative, and provide the representative with the gathered information.

You could try 'debug cable arp' to see what is happening (just don't try such commands during normal hours if you cannot risk the service going down)

Hope that helps - pls rate the post if it does.

Regards,

Paresh.