What's the device logs saying? Mikrotik will say which port it's detecting a loop on. Hopefully the same with your other devices. I've seen faulty Mikrotik equipment cause this.
Jon Langeler Michwave Technologies, Inc. > On Jan 17, 2017, at 11:33 PM, Sterling Jacobson <[email protected]> wrote: > > Any of you guys work with switches a lot? > > I use banks of switches in my fiber, set up per neighborhood. > > But really they are all linked via fiber so it's pretty much like a > datacenter. > > I'm using a few MPLS/VPLS tunnels to the switch banks. > > I'm having a real hard time tracking down a loop issue though. > > It's related to MikroTik lovely change in version 6.38 for STP/RSTP bridge > stuff. > > My problem is with an IBM switch I don't know very well. > > I suspect I have settings wrong for STP/RSTP etc. > > The switches are a simple configuration of VLAN 1/default for customer > traffic, then another VLAN for management from the device at their house/MDU. > > I pull out the VLAN management at the mikrotik and bridge it with an area > wide L2 MPLS network. > > My problem is the IBM switches keep shutting down access to customer data or > management or the other switches they are connected to. > The crude method of recovery is reboot the switch. > > At the 'head' of the VPLS network I use an EOIP tunnel to a hosted mikrotik > that hosts the Dude and a few other management VM's on that layer2 network. > > I'm regretting I did that and didn't create a more sophisticated routed > management network. > > But the hosted mikrotik is complaining of loop packets and sometimes just > goes wild and shuts down it's EOIP connecting interface for 60 seconds. > I can't seem to find a way to tell it to NOT do that either, seems like it's > built in to 6.38 no matter what Loop Protection I turn off or STP I disable. > It's not like it's a lot of traffic, it's just seeing some BPDU or STP type > packets and killing itself. > > What is the best practice for switches regarding RSTP/PVRST BDPU guards and > STP root paths etc? > > The switches typically have two uplink ports going to the router or another > switch, the rest are customer facing ports.
