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Community Member

Spanning tree is invalid

HI,all

Two switches ,respectively,4506 with module 4306 of 6 GBIC cards and 2960-48 with two SFP interfaces,are connected to respective optical interface (two GBICs on 4306 and SFP interface on 2960) using dual Fiber.BUT the two switches all became root,spanning tree is invalid.why?

thank you!

Best Respects!

Min Quant Kuo

3 REPLIES
Community Member

Re: Spanning tree is invalid

What mode of spanning tree are you running on each switch and how many Vlans on each switch

Community Member

Re: Spanning tree is invalid

hi,

Are they in the same vtp domaine ?

Community Member

Re: Spanning tree is invalid

sorry

thestagman,mbuillon

I will check it,then give response to you.

thank you!

Respects!

Min Quant Kuo

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