[spanning-tree] outage when blocked port goes down
Even thought this would require a longer explanation, I was wondering if someone might point me into a new direction or maybe correct me regarding my STP beliefs.
I have a ring topology (a circle). STP is blocking one port (for simplicity sake), the link that's farthest from the root switch. Everything looks normal, as far as I can tell. Assume that this blocked link lies between switches X and Y. The network is running regular STP (let's not get into that, please).
Now, for some reason, when the blocked link goes down (X--Y), I experience a severe outage. AFAIK, that's supposed to happen only if a link that's on FWD goes down, but not when a blocked port goes down. Any ideas?
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