- Blue, 1500 points or more
Heres the scenario:
I have an L2 access layer switch, dual-homed to a routed core.
Its a non-looped triangle topology. So, there is no L2 between core switches, and the uplinks are L2 trunks. Each access switch supports one vlan -- not spanned to another switch, confined.
So, lets say C1 is the root bridge for vlan 10 and also the HSRP primary for vlan 10. Lets say A1 is running vlan 10.
The uplink to C1 will be the one that passes traffic between A1 and C1. But what if that trunk dies?
What I think would happen is that C2 -- having lost L2 adjacency to C1 -- will declare itself the HSRP primary for vlan 10 and it will also become the root bridge for vlan 10. yes? No?
In that case, how long will it take A1 to failover to the backup link?
My confusion stems from the fact that, since this is a non-looped topology, the backup link between A1 and C2 will not be in a blocked state -- there is no loop. So what will the dependency be regarding failover time?
Lastly, before the failover, will the secondary trunk interface be a "designated port" and will the interface on C2 (facing A1) be a "root port"? I think the answer to both is yes. Yes? No?
I dont have access to my lab to test this out right now and I need an answer.