I got a customer with MLAG’ed stacks as peers (X670-G2 and X460-G2 in each stack), where the edge switches are X440-G2 stacks, LAGged to both peers. So the whole environment is EXOS.
When I upgraded from 22.3 to 22.5 I got LAG uplink ports (master) on edge stacks set to blocked.
Command “debug vlan show vpif default 1:52” run on edge stack showed that STP was registered on the port.
Before the upgrade to 22.5 I didn’t setup STP in any way, although it was enabled by defalut AFAIK.
After the upgrade I tried to disable stpd on edge stacks, but it didn’t help.
As we had a downtime in production network, there was no time for further troubleshooting and we have to revert to 22.3, which resulted in getting network up and working again.
I haven’t disabled STP on MLAG ports at MLAG peers when running 22.5, as I have no time.
I know that RSTP support for MLAG was introduced in ExtremeXOS 22.5 and that changed the way STP works in my setup.
Do you think disabling STP on MLAG ports at peers would help in this case ?