Best Network Design For 9Ks In NXOS Mode

[DamianRC]

We are transitioning from a 7K, 5K, 2K EVPC environment to an 9504, 93180, 2K one.

Can FEXs be dual-homed to the 93180s?

Which is the best design approach: Traditional VPC or Leaf and Spine L3 routed with ECMP?

[luke.brooker1]

You should be careful with Dual-homed FEX's with 93180 Nexus models. This doc shows a good list of what is and is not supported for FEX topology with different Nexus models

https://www.cisco.com/c/en/us/support/docs/switches/nexus-2000-series-fabric-extenders/200363-nexus-2000-fabric-extenders-supported-un.html

I recently hit an issue where i tried to dual home some FEX's (N2K-C2332TQ-10GT) to 93180 and it is not supported (but you can (probably) work around the limitation / use straight through VPC Design for similar level of redundancy)

I think lead-spine is the current best practice, but depends on your needs whether or not i will be best for you.