cat4500e dot1q encapsulation command fails

Unanswered Question
Jul 18th, 2012

     I have a Catalyst 4500 L3 Switch Software (cat4500e UNIVERSAL-M), Version 03.02.00.XO RELEASE SOFTWARE (fc2). So I just wanted to verify that the switch only does dot1q encapsulation because the switchport trunk encapsulation dot1q command does not work. Is this documented somewhere.            

I have this problem too.
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glen.grant Wed, 07/18/2012 - 13:41

  You can be reasonably sure if the commands are not there it is all it supports . I believe you can check with something like show int capabilities .

Leo Laohoo Wed, 07/18/2012 - 15:27

Depends on your linecard (not the supervisor card).

Some line card will only support 802.1Q so entering the command will result in an error message.

As what Glen has posted, if you enter the command "sh interface cap" and scroll down to "Trunk encap. type".  If you get only 802.1Q then this is the reason.

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Posted July 18, 2012 at 1:36 PM
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