Re: (PM) MTU size?

Karl Denninger (karl@Mcs.Net)
Tue, 30 Jun 1998 15:14:22 -0500

On Tue, Jun 30, 1998 at 02:56:25PM -0500, Kevin Sawyer wrote:
> From: Jake Messinger [mailto:jake@ams.com]
> Sent: Tuesday, June 30, 1998 2:41 PM
> > > on a modem connection, and by george if it doesn't work. Should we
> > > consider dropping the NAS-side MTU on async connections to
> > 576 as well, and
> > > if we did, what negative repercussions would there be?
> >
> > Its not going to matter if the calling end has 1500 set.
>
> Whoa...if we specify 576 on our end, doesn't it force 576 for both ends
> of the connection? Are you saying that they will still transmit to us
> with 1500? Can you quote any sources for this information?
>
> --Kevin

PPP MTUs are negotiated before the connection AUTHENTICATES.

Ergo, an MTU spec in the RADIUS database does nothing, since the client has
already negotiated it before it sends the user request.

--

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