Re: Cisco Nexus

["Justin M. Streiner" <streiner () cluebyfour org>]

On Mon, 2 Feb 2015, Brandon Ewing wrote:

> On Mon, Feb 02, 2015 at 12:51:04PM -0600, David Bass wrote:
> > The n2k ToR is not a great design for user or storage interfaces if most of your traffic is east/west.  It is great as a low cost 
> > ilo/drac/choose your oob port, or if most of your traffic is north/south.  Biggest thing to remember is that it is not a switch, 
> > and has limitations such as not connecting other switches to it. Like anything else you have to understand the product so that 
> > you don't engineer something that it wasn't designed to do.
>
> And remember -- The Nexus 2K performs absolutely ZERO local switching -- all
> frames received from client ports are just copied to the upstream device, so
> it can handle the frame/packet forwarding logic.

Also remember that the Nexus (5K, at least) does cut-through switching. 
If you receive an errored frame on one port, the switch can and often will 
happily forward those errored frames once it figures out the destination 
MAC address(es).

jms