%C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET: (Suppressed 4880 times)Packet received with invalid source MAC address (00:00:00:00:00:00) on port Te1/1 in vlan 207

[Mohammed Rahim Humide]

Dear All,

i have one C4500 as a core switch connected to access switch 3750X (6 switches as stack) so we have received this log on C4500:

001201: Apr 23 20:35:36.121: %C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET: (Suppressed 2395 times)Packet received with invalid source MAC address (00:00:00:00:00:00) on port Te1/1 in vlan 207
001202: Apr 24 03:17:16.226: %C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET: (Suppressed 8460 times)Packet received with invalid source MAC address (00:00:00:00:00:00) on port Te1/1 in vlan 207.

when this message happened one of application is hanging "apatchi server"?

can anyone help to troubleshoot and olve this issue?

Thanks

[Georg Pauwen]

Hello,

check the NIC of the Apache server, it could be faulty. You can configure the C4500 to drop packets with a source of 00:00:00:00:00:00"

C4500#conf t

C4500(config)#vlan 207

C4500(config-vlan-207)#static-mac-address 00:00:00:00:00:00 drop.

[Mohammed Rahim Humide]

Hi Georg,

tha apache server connected to C4500 and the invalid mac address coming from the uplink to access switch. is there any way to trace this mac address?

thanks

[Georg Pauwen]

Hello Mohammed,

your best option is probably to use Wireshark to trace the MAC address...

[Mohammed Rahim Humide]

Hi Georg,

thanks for your reply.

do you want me to use the source is vlan 207 or ten1/1?

do you thing this issue from this invalid mac address?

Thanks

[Georg Pauwen]

Hello,

source should be Vlan 207...

Unless you have some sort of multicasting configured on your network, the all zero MAC address is most likely invalid...

[Mohammed Rahim Humide]

Hi,

we are not enable any multicast, but the issue happened once we receive this log.

[andrewswanson]

Hi. Do you have IP Device Tracking enabled on your 3750-x stack?

Andy

[Mohammed Rahim Humide]

Hi All,

No i dont have IP device tracking, but during the issue happened i have receive attached error in apache server. Is it related to network issue ?