Extreme Networks

difan · 4 weeks ago

Quick question:

Does two Backbone VLANs mean I can only load balance between two PATHs?

For example, in scenario that I have three BCBs sw1, sw2 and sw3 and two BEBs sw4 and sw5. Sw4 and sw5 has connections to all three BCBc but not between each other. When users/devices on sw4 communicate to users/devices on sw5 (on the same VLAN/I-SID), can traffic take all three paths/BCBs, or will it take only sw1 and sw3 (for the two Backbone VLANs, one picking the lowest system ID sw1 and another picking the highest system ID sw3?

Thanks!

Difan

EXTR_Paul · 3 weeks ago

In an SPBm network ALL TRAFFIC will take the shortest path on a physical links between BCBs and BEBs.

However, in a situation where there is a symmetrical equal path between BCBs and BEBs traffic will get balanced across the links.

However, the necessity to balance over more than 2 BVLANs is redundant because the equal path vector can only ever be over two links. Balancing over more than 2 BVLANs really gives you nothing.

View solution in original post

Shaja · 3 weeks ago

Hi Difan

Yes it is the "IEEE_802.1aq standard" support up to 16? .. but extreme fabric connect is only on 2.

The Alcatel-Lucent Omniswitch 6900 support more then 2 not sure why it not the same ..

https://www.al-enterprise.com/-/media/assets/internet/documents/spb-architecture-tech-brief-en.pdf

I think the

https://een.extremenetworks.com/265805-multipathing-in-spb-networks

Extreme Networks

Fabric Connect Load balance among more than two paths, possible?

Fabric Connect Load balance among more than two paths, possible?