This error message signifies that a MAC address is moving consistantly between different ports. This error message is only applicable on the Catalyst 2900XL and 3500XL switches. The error message may indicate that two or more HSRP routers have become active. However, the error message may indicate where an STP loop, duplicated frames, or reflected packets are being sourced.
The most common cause for MAC addresses moving around is Spanning-Tree Problems or Physical Layer Problems.
When troubleshooting this error message, follow the steps outlined below:
Determine the correct source (port) of the host MAC address.
Disconnect the port that should not be sourcing the host MAC address.
Document the STP topology on a per VLAN basis and check for STP failure.
Verify port-channeling configuration. An incorrect port-channel configuration may result in the host MAC address flapping error messages, due to the load-balancing nature of port-channeling.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.