ISL & 802.1Q Configuratoin

Unanswered Question
Sep 18th, 2007

All of our switches in our network are Cisco ISL Trunks. I recently purchased a WS-C2960-8TC switch and just realized it only supports DOT1q.

This trunk port connects to a 3508G, which has other ISL trunks to other facilities/switches on separate VLANS.

My question is, if I configure this single link as 802.1q and the rest remain ISL, will traffic get forwarded? Ideally, I would like to stay consistant and perhaps change the entire network to 802.1q, but right now, that is not an option.


I have this problem too.
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Kevin Dorrell Tue, 09/18/2007 - 07:06

There should be no problem using ISL one one trunk and dot1q on another. The encapsulation protocol is significant only on each individual link.

Kevin Dorrell



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