Accelar1200-Port "blocking" 1

[yanshuang]

There is a problem in our switches(Accelor1200 with 5 fabric modules) recently,the fact is that the two fabric ports are in "blocking" status,but the lights are normal(green and flash),and each port is in the same configuration. I don't know how to solve the problem.
please help me.

 

[jimbopalmer]

Is this Spanning Tree Protocol?

Spanning Tree blocks ports to avoid loops. it does not mean the ports are not functioning, just that if they weren't blocked, broadcast storms would take down your network.

http://en.wikipedia.org/wiki/Spanning_tree_protocol

I tried to remain child-like, all I acheived was childish.

 

[yanshuang]

Thanks you for replying so fast and usefully.

I checked the configuration again and found that there are loops on the pair of switches really--In VRRP config table,there are 5 vlan in the same priority "100" and the same state "backup" on the two core switches.So when i linked two fiber cables on the pair of switches ,a port must be in "blocking" state for avoid broadcast.

I'll renew the config on Saturday when the staff will not be on vacation.

thank you again.

 

[jimbopalmer]

It is possible to turn on Multi Link Trunking if you want multiple paths between devices without Spanning tree issues.

You may wish to read up on that, as well.

I tried to remain child-like, all I acheived was childish.