STP Questions help

Unanswered Question
May 24th, 2008

Hi Friends

I have 3 switch connected in triangle fashion, A-B-C-A and i have force switch A to Root bridge by command "root primary" Now i am adding one more switch into network setup, i.e Switch D, i am modifying switch prioriy manualy 2 , in that case all who wil be root bride.

All the switch are in Vlan100.

Please tell me i am stuck up in the middle of reading ..


I have this problem too.
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mahmoodmkl Sat, 05/24/2008 - 23:14


its going to depend whats the priority of the current root bridge.i think whne u configure it for the root primary its going to set a default priority of 8192..not sure.So if u r going to introduce a new switch a priority lower than the current root,this switch is going to assume the role of the root switch.



Giuseppe Larosa Sun, 05/25/2008 - 03:43


I agree.

I agree the root primary is a macro that expands in the necessary commands but it is executed ony one time.

Whatever priority value has been used on switch A if the new switch D has a lower priority it will become the new root bridge.

hope to help


minumathur Mon, 05/26/2008 - 09:32


That means if switch is configure with Root primary command will make no difference if i will introduce one more switch with lower priority...


mahmoodmkl Mon, 05/26/2008 - 10:27


Yes,if u introduce a new switch with lower priority its gonna assume the role of the root bridge.




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