[nsp] Virtual templates for ISDN users

[jc]

On Sun, 1 Sep 2002, Scott wrote:

> well I'm no expert on it, but it's a bug in several IOS's.  The default is
> 1500 so you can't set "ip mtu 1500".  BUT if you set mtu 1501, then override

ah yes, had that problem earlier on, i sticked with 1514 :)

> it with "ip mtu 1500" then the 1500 will stick and show in sh run.  It's a
> workaround I came up more or less accidentally and with a Cisco technical
> friend's help.  It's now part of a documented workaround in one of (or the
> main) related bug.

:)

> Here'a a quote from with some of the technical explanations I had on file:
> "mtu" is supposed to be the underlying layer 2 (interface) MTU
> (net of layer 2 headers.)  "ip mtu" is the layer 3 MTU.  "ip mtu"
> can't be larger than "mtu" but it can be smaller.
> In looking at CSCdt91142 (which is the problem were a vaccess
> can get a too-small MTU value), it seems that "ip mtu 1500" is
> the reliable workaround (we hope).
>
> HTH,

indeed.

thanks for the explanation


-*-
j.

chief janitor (Tree d'P)

#include <std-disclaimer.h> - 'save the trees, send an email'