This what i got as the defenition of the error:
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%SYS-4-P2_WARN: 1/Invalid traffic from multicast source address
Problem
The switch is generating Invalid traffic from multicast source address messages.
Description
This is an example of the syslog output that you see when this error occurs:
SYS-4-P2_WARN: 1/Invalid traffic from multicast source address
81:00:01:00:00:00 on port 2/1
%SYS-4-P2_WARN: 1/Invalid traffic from multicast source address
81:00:01:01:00:00 on port 2/1The Invalid traffic from multicast source address syslog message is generated when the switch receives packets with a multicast MAC address as the source MAC. The use of a broadcast or multicast MAC address as the source MAC for a frame is not standards-compliant behavior. However, the switch still forwards traffic sourced from a multicast MAC address.
The syslog message indicates the multicast MAC address in the source MAC field of the frame, and the port on which the traffic was received.
The workaround is to try to identify the end station that is generating frames with a multicast source MAC address. Typically, such frames are transmitted from a traffic generator (for example, SmartBits) or third-party devices that share a multicast MAC address (for example, load-balancing firewall or server products).
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I would try to trace from port 1/1 and see what device may cause this traffic pattern. What's connected to port 1/1?
