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New Member

I have 2 ports on a distro 3750 that trip every Sunday from an MAC that resolves to our core switch. (non cisco)

I have 2 ports on a Cisco 3750 distro switch that are put in an err-disabled state every Sunday. The error is 'security violation occurred, caused by MAC address XXXX. This MAC address is associated with our Juniper core switch, showing up in spanning tree associated to all the layer 3 aggregate ports.

5 REPLIES
Silver

Hi, What event is happening

Hi,

 

What event is happening at that time? Is there a switch config backup at that time?

 

Thanks

John

New Member

John, that was our original

John, that was our original thought, but the backups don't run at that time and no other network event happens. thank you

what is plugged into the 2

what is plugged into the 2 ports that are going down?

do you have port security, or arp inspection turned on?

New Member

The 2 ports are connected to

The 2 ports are connected to user workstations. Port security is active on each port, arp inspection is not.

New Member

just to give an update. we

just to give an update. we have noticed that there are other ports on other switches being effected, however, not on a consistant basis. same MAC address, same outcome.

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