There is probably a failed NIC (or application) in your network putting incorrect source address to the frames. Even if you are able to catch the frame you will just see the incorrect source address (you might be able to see IP address in the frame - maybe - and detect the PC via IP).
The only info you've got is the frames are coming from port 1/2. You can look to the switch connected to the other end of the line and check it's log.
If you are receiving these error messages constantly, you can try to compare the time with the syslogs on particular switches and find ports which have just come up at the time the message appeared. But this is almost impossible in a large network.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...