Root port

Unanswered Question
Apr 21st, 2010

I have two switches A and B connected together through two trunks A1  ---- B1, and A2 ---- B2. present the root bridge is A, and all the ports  are forwarding. As for B, the root port is B1, and B2 in blocking. My  question is how do I make B2 forwaing on B. On my lab I reduced the cost  of B2 on B from 19 to 10, and it works. Bu on cisco site, I was told  you will reduce the cost of A2 on A for B2 to be the root port on B.  Please assist.

I have this problem too.
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Just Kennie Wed, 04/21/2010 - 04:38


  Thanks for the reply. What I need is clearification. If I want B1 to be blocked, where will I do the cost manupilation ? on switch A or B. Thats the question.

Lei Tian Wed, 04/21/2010 - 05:33


You can either change cost on B or port-priority on A.


Lei Tian

Just Kennie Wed, 04/21/2010 - 06:03

Thanks guys, I just lab it, and it worked . You'v just made my day . lol.

Idowu Kehinde




CCIE (written)

On Wed, Apr 21, 2010 at 1:34 PM, letian

droeun141 Wed, 04/21/2010 - 07:37

How did you manage to pass the IE written (or even CCNP) without knowing  the answer?


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