Hi there Merry Xmas..
We have two 3750 core switches and one mpls switch.
Core Switch B connects to switch A via port channel. The Mpls switch connects directly to switch A.
Switch A is hsrp active for all vlans.
We would like to connect the MPLS switch to Core switch B as well and use that for redundancy.
Now i understand also that spanning tree will be an issue with 2 connections from the mpls switch.
I've setup ospf on all devices and core switch A is the spanning tree root.
The issue though is that traffic across the MPLS network seems to work fine to start with then after about 20mins it stops routing across. I then have to unplug the MPLS connection to switch B and then reset the connection to switch A to fix.
Any thoughts?
Is this best method to obtain redundancy for this?
OSPF on just core switch A works fine but once adding core switch B into ospf we start to see issues.
Basic Diagram attached..
