Proxmox cluster and STP on Unifi

[fcarucci]

Hello,

I have a proxmox cluster with three nodes.
Each node has two NICs.

So, for each node, I have two interfaces (each on its own vlan) and two bridges:
vmbr0 - corosync, admin
vmbr1 - VMs

Periodically two of my nodes get rebooted at different times. After (a lot of) investigation, I found out that the Unifi switch is STP blocking ports of my nodes and, I believe, this is triggering the node reboot, since it can't communicate with the cluster.

What am I doing wrong? How can I prevent the switch from STP blocking the ports and triggering a reboot? What other info would be needed to investigate the issue?

Thanks!

 

[spirit]

disable stp on your switch.
(you really don't want stp for proxmox ports)

 

[fcarucci]

Thanks. The bridges have STP disabled, but I'll disable STP on each port the nodes are connected to the switch and monitor.