I have had similar experiences with the same setup. We have 2950's downstream from a 6506 with the MSFC card in it. Every once in a while the switch seems to lose its way to the downstream 2950's. To fix it I have had to get into the MSFC and ping from there to the downstream switch. As soon as I log back into the switch part of the 6500, I am able to ping again. It is like it discovered the router all over again.
Is your native vlan set to the same vlan-ID on both ends?
Does this setting match with your default vlan?
With 802.1q, the native vlan is transmitted untagged. Frames may not be recognized correctly when a tagged frame is received, and an untagged frame was expected vice-versa. This can result in losing connections in the way that is described.
It is good practice to set your default vlan as native.
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.