I am looking for some more information on how ECMP would work in an Extreme Automated Campus deployment.
If we take a simple Spine leaf design:
We configure the above SPB Fabric (With the two Backbone Vlans)
If we have a single service (ISID) that is configured across all three Leaf VSP's.
A single layer 2 environment for all servers connected to the leafs.
If traffic had to move from one VSP 7200 to another we have two links (Via Spine) to the remote VSP 7200.
Will the underlying ISIS forward the traffic using ECMP and load balance across both both the links?
From reading documentation I understand that in SPB different I-Sid's (Odd's and Even's) is load balanced across the two backbone vlans, but in the event of having a single I-Sid how does load balancing work?