Extreme core switch and Top of rack switches

[Asifi]

Hello Community,

I have a setup question.  I have 2 sites with and Extreme 8404 core switch at each site.

I have 2x top of rack switches in a port channel on each site going into their respective Extreme core ports.

However, I do not have a core connection from Extreme core switch site A to top of rack site B and Extreme core switch site B to top of rack switch site A.

Can anyone advise the best way to do this please?

I have a fibre link between the the 2 sites with free fibre cores to use.  The top of rack switches are currently using 2 core ports at each site going into the Extreme core switch (LACP).

The below is what I need.

Any thoughts or advice?

Thanks in advance.

[WillyHe]

When the CORE's are in SMLT cluster configuration then you can connect the DELL switch/stacks wit one LAG (static or LACP active) the SMLT LAG's on the CORE's.

When the CORE's are not SMLT cluster configuration, then you must connect each DELL switch/stack with separate links/LAG's to the local and to the remote CORE and rely on spanning tree (MSTP) for loop prevention and recovery.

[XTRMUser]

I think your cores are running VOSS correct? What about your TOR's? 

[Asifi]

@XTRMUser - Yes on the cores it is VOSS and the TOR switches are Dell and Use OS10 Smart Fabric.

Thanks,

[XTRMUser]

We have a similar setup. In ours, our two Cores are vIST'ed together. Then on each site, our two top of racks (running VOSS) are vISTed to each other. Then from site A, there is an uplink to Site A core, and one uplink to Site B core. You can either do both uplink from one top of rack (TOR), or (what we do) one uplink from first TOR to site A, and one uplink from second TOR to site B.

Somebody correct me if I missed something, or didn't explain this very well.