'spanning-tree extend system-id' allows for VLAN IDs greater than 1024 .... so, you will not have to apply this command if you can change your vlan id to a value less than 1024.
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Question
is there any effect if i enable spanning tree Extended System ID in my core 2 switch
Hi
We two core switches
when i try to create new Vlan 1172 in core 2 i am getting "% Failed to create VLANs 1172
Spanning-tree extend system-id need to be enabled."
when i checked in core 2 switch Spanning-tree extend system-id is in disable mode.
if i enable this is there any effect to my present running network.
we have nearly 40 Different Vlans in our network.
Thanks in advance.
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Answers
Hi vjlp,
Thanks for your reply,
we would like to create 1172 only because our all vlans numbers are associated with ip address. we alredy have 172 vlan. Now we are creating one more subnet in 172 series so we are planing to put this vlan number.
is there any way to find Quickly these spanning tree topology changes.
Thanks in advance
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by: vjlpPosted on 2008-08-18 at 07:36:38ID: 22252233
When you enable or disable the extended system ID, the bridge IDs of all active STP instances are updated, which might change the spanning tree topology.