Re: System MTU question

From: Marko Milivojevic <markom_at_markom.info>
Date: Sun, 18 Oct 2009 11:58:50 +0000

On Sun, Oct 18, 2009 at 11:48, Justin Mitchell <jgmitchell_at_gmail.com> wrote:
> Is it IOS version specific then? I'm reviewing the final configs for
> the lab and I don't see either command being issued.

The command "system mtu 1500" on switches is the default one. Even
when value is changed, it will not be stored in neither running-config
nor startup-config. On Catalyst 3550, this information is stored in a
separate file on the flash. On Catalyst 3560, you can't see it, unless
you do "show system mtu".

This is one of the well-know little gotchas on the actual lab exam.
You *have* to know how to solve this. Hence, when configuring routing
protocols on switches, make sure you know what their MTU is.

--
Marko
CCIE #18427 (SP)
My network blog: http://cisco.markom.info/
Blogs and organic groups at http://www.ccie.net
Received on Sun Oct 18 2009 - 11:58:50 ART

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