C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET: (Suppressed 15 times)Packet received with invalid source MAC address (A1:14:97:1F:26:90) on port Te1/1 in vlan 2.
i have only 2 No's of Servers in vlan 2 and i hope from any one of the server is genenrating the false mac address packet. So i m thinking to apply a mac access-list for the 2 mac-addresses of the servers. pls confirm the below configuration are perfect. OR Suggest me some different solution, i have tried with port security but i m receiving an errorfound duplicate mac-address. so i have switchover to this solution.
That does seem to be a bit of a sticky plaster solution rather than actually seeing what's causing the problem. Any access list adds processing load to the router and it would still be dropping bad packets.
Look in the routers arp table to see if the mac is resolved to any ip address then look at the switch forwarding table to see which physical port the mac is seen on!
It could be a dodgy nic or someone has manually entered an illegal value..
Sorry but does that mean you know which server is generating the illegal packets?
All I'm saying is either a server nic is configured with a sw overide mac or is faulty. Once you put that filter on you've got to mange that, I.e. you go on hols and someone wants to add a new device on the LAN you'll have to keep adding MACs. What if the hw goes faulty and the new server is plugged in with a new MAC?
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