Error Message

[rickyt00]

%SYS-4-P2_WARN: 1/Filtering Ethernet MAC address of value zero from agent host table interface

I am getting this message on a switch in my network. I disabled the ports that it said it was flapping between until I figure out what this error means. Anyone have any thoughts. Thank you

[erhoehne]

Below is the info the cisco error message decoder gave me.

%SYS-4-P2_WARN: Filtering Ethernet MAC address of value zero

The "Filtering Ethernet MAC address of value zero" syslog message is generated when the switch receives packets with a source MAC address of 00-00-00-00-00-00, which is an invalid source MAC.

Recommended Action: The syslog message indicates that the switch is refusing to learn the invalid address. However, the switch will forward traffic sourced from an all zeros MAC address. Try to identify the end station that is generating frames with an all 0's source MAC address. Typically, such frames are transmitted from a traffic generator (for example, SmartBits), certain types of servers (such as load balancing IBM WebSphere servers), a misconfigured router or end station (for example, a device transmitting all 0's broadcasts), or a faulty NIC.

[rickyt00]

Thank you. The problem was some XP machines that were cloned. After the clone all the machines showed 00-00-00-00-00-00 for the mac. Updated the driver for the nic and the correct mac is there. Thanks