Cisco Nexus 3548 cut-through from 1G to 10G or not?

[JakeNakamura91016]

Hi all,

I have a Nexus 3548 and an incoming link at 1G and an outgoing link at 10G. I know the Nexus 3548 is a cut-through switch but I've read that when you go from 1G to 10G on some other cut-through switches it will change to store-and-forward. I have not been able to find any information that suggests this is or is not the case for the 3548. Does anyone know whether the 3548 operates the same or not? Also, would it make a difference if WARP mode is enabled?

Thanks in advance.

[balaji.bandi · Accepted solution]

[JakeNakamura91016]

Thanks Balaji.

I had indeed seen this overview for the N5K, but as the 3548 is specifically a low latency switch, I was wondering whether it was different.

[Sergiu.Daniluk · Accepted solution]

Just to add to @balaji.bandi table (which I am not sure if that is really for N3500 since there is no FC/FCoE on this platform), if Nexus 3500 is in WARP mode, the switch will pretty much act like a wire (the frame processing is minimal), regardless of ingress/egress port. That means no store-and-forward. 

Stay safe,

Sergiu

[balaji.bandi]

The one inforamtioin pulled from specific related to Nexus 5K - but other features can be related to this question.