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Bronze

%C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET

Hi all,

The following  log message is observed on 4507 swicth running IOS : cat4500-entservicesk9-mz.122-54.SG1. I am aware that this is a multicast packet which is invalid and no learning is done. This is wasting my cpu resources.

Wiuld like to know how can the source generatting these packets can be traced.

%C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET: (Suppressed 10 times)Packet received with invalid source MAC address (01:00:5E:7F:FF:FA) on port Gix/x  in vlan X Server's public key below the mandatory size of 768 bits!

Regards,

Sathvik K V

4 REPLIES
Gold

%C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET

Hello Sathvik,

Please look at this document

https://supportforums.cisco.com/docs/DOC-36000

hope it helps you

Regads,

Ashish

Bronze

%C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET

Hi Ashish,

Thank you for the document!!

Had gone through similar kind of DOC earlier but wanted more claritiy on tracing the source of the packet. I have multilple L3 switches connected and i am able to see logs on 4506 and 4507 switches.

I started tracing the the source with the help of log generated in 4507 Switch. The interface is connected to a 4506 switch. Againg i saw logs in 4506 and the interface points back to 4507 switch. Would be helpful if u can help me in this regard.

Regards,

Sathvik K V

Community Member

%C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET

Hi,

Pls use the wireshark to indetify the source

Also I like to add, the issue is seen on multiple interfaces and 2-3 switches, having roaming users, its difficult to trace the source NIC sending these packets. Thus, kindly upgrade the IOS code on the switches to 12.2(53)SG7 or higher version

Br/Subhojit

Bronze

%C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET

Hi Subhojith,

Thanks for the suggestion.

In IOS 12.2(53)SG7 is the issue solved?? i Mean does the switch drops in Hardware?

Regards,

Sathvik K V

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