I was having a bit of an issue with dot1q-in-q and l2 protocol tunneling where nterfaces were going err-disabled.
I understand now (and I stresss the word now) that if a packet with the special multicast mac address used for tunneling is recieved on an interface configured for l2 protocol tunneling it will go err-disabled. The fix for this is to restrict specific VLANS on the trunks. However, I found this easier said than done (especially if this was a large service provider network). I have to admit that this is the very first time playing with dot1q-in-q tunneling so i am hoping some of you guys have been there and done that so to speak. Is there any debug command or show command that can help me determine what VLAN is causing the issue to make it easier to track down? Thanks Aaron
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
