HSRP and STP
Posted on 2011-09-19
I'm testing a HSRP configuration between two layer 3 switches and two layer 2 access switches.
The HSRP functionality between the two layer 3 switches appears to failover as expected but I appear to have a stp convergence issue.
I have one hsrp switch configured as the root primary and the other as the root secondary for all vlans. When I failed over from the root primary to the root secondary, I lose about 70 packets during a ping test from an access switch to a device connected to the other access switch. When I perform the same test during a failover from the root secondary to the root primary, I only lost 1 packet.
I'm currently using rapid pvst. I'm assuming the additional packet loss is due to convergence? Any ideas?
Update: One thing I didn't mention was how the switches are connected. I have a trunk between the two layer 3 switches. Then each access switch as a trunk to each layer 3 switch.