Jumbo Frames

Is anyone currently using Jumbo frames in their environments? If so what
kinds of performance increases (if any) have you seen and what sort of pain
points have you experienced.

Are you running it in a small segment of your network or across the entire
environment? Are you running it in your data centers, your campuses, or
both?

I've been doing some reading on the topic and opinions seem all over the
place on this. Personally I have set it up in the lab and it did seem to be
somewhat beneficial, but then I think about taking it to my environment and
i wonder what happens when that flood of 9K packets hits the edge ASA and
has to be fragmented and shipped over a VPN. Does the ASA spike it's CPU
and roll over? What happens if you are carrying VOIP traffic on the same
links?

All thoughts and opinions appreciated.

-- 
Marc Abel
CCIE #35470
(Routing and Switching)
Blogs and organic groups at http://www.ccie.net