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Question about the spanning-tree priority statement

I have the following statements in my config:

spanning-tree vlan 1,20,27-28,30,32-64 priority 28672

spanning-tree vlan 72-88,90,92,96-101,104,106,160-163,200,202 priority 24576

spanning-tree vlan 204,206,250-251,254-255,264,800,980,999,1030 priority 24576

These were put in from when the switch was originally installed a few months ago. Now I want to add a vlan with a priority of 24576.

Will it just append itself to one of the existing lines or will it create a new statement? Spanning tree is a bit of an issue here and I don't want to make any changes that might cause a massive reconvergence of the network.

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Hall of Fame Super Blue

Re: Question about the spanning-tree priority statement

Roland

Doesn't really matter whether it adds it to existing line or creates new one. What does matter is if you change the priority of a switch for that vlan STP will need to recalculate for that vlan and only that vlan. So this sort of thing is best done out of core production hours.

Jon

2 REPLIES
Hall of Fame Super Blue

Re: Question about the spanning-tree priority statement

Roland

Doesn't really matter whether it adds it to existing line or creates new one. What does matter is if you change the priority of a switch for that vlan STP will need to recalculate for that vlan and only that vlan. So this sort of thing is best done out of core production hours.

Jon

New Member

Re: Question about the spanning-tree priority statement

Thanks for the help gave me the answer I was looking for.

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