Hi
I have two S3048-ON configured with VLT and RSTP. I have connected one PowerConnect 5548 to each S3048-ON (1 cable to each, no LACP). The 5548 also have RSTP enabled with a priority of 57344.
One S3048-ON is root bridge (RSTP) with priority 4096 and the other S3048-ON has priority 8192.
The 5548 doesn't receive any BPDUs and therefore sets itself to root bridge.
I've briefly connected the 5548 to another lowend office switch with lower priority than 57344 and the 5548 behaves correctly and set itself to non-root.
I've tried to do a factory reset on all switches and reconfigure, but the result is still that 5548 sets itself as root bridge.
Is there a special behaviour when VLT is configured that is causing RSTP to be isolated from other switches connected to VLT enabled switches ?
Or does the 5548 need to connect with LACP configured for RSTP to work ?