[c-nsp] setting max mtu on switch (Jumbo)

[Mark Tinka]

On Tuesday, May 29, 2012 02:06:00 PM -Hammer- wrote:

> One thing that I recently suffered thru regarding this is
> how your vendors define "jumbo". In a single vendor shop
> like Cisco, you may define 9000 to your end devices and
> 9216 to your switching to account for overhead. But
> other vendors treat jumbo differently and some (Yes,
> this is 2012) don't support it. Recently I had a multi
> vendor environment where one of the larger core vendors
> didn't support it. The result was that any performance
> gain from the entire solution was really sacrificed by
> the fact that one of the vendors would issue PMTUD and
> knock the frame down to 1500 regardless. Make sure you
> confirm the feature/function thru all your touchpoints
> and are actually going to benefit from it.

This is one of the reasons that while we embrace multi-
vendor topologies, we stick to as few as possible (two, in 
our case).

Mark.