Re: 802.1q Tunneling and l2protocol-tunnel and 4.0

I hope this finds each one of you doing well.

On the subject of killing multiple birds ...

If you are going to change the system MTU, it is a good idea to read ahead
and see if you have any IPv6 or anything requiring you to change the SDM
template.

HTH,

Andrew Lee Lissitz

On Mon, Nov 9, 2009 at 2:24 PM, Marko Milivojevic <markom_at_ipexpert.com>wrote:

> On Mon, Nov 9, 2009 at 16:56, Donald Virgil <d.virgil88_at_gmail.com> wrote:
> > Yea not worried about Q-inQ per se, just more about how it affects STP,
> > other lab points (Routing), and MTU sizes.
>
> Ah, the horror days of 3550 :-). Yes, you may need to change "system
> mtu" on the switch to accommodate larger frames required by Q-in-Q or
> PPPoE, but routing MTU issues on 3560 are easily fixed by doing
> "system mtu routing 1500", which does not require additional reload.
>
> You can hit two birds with one stone by applying that command if asked
> to change MTU on the switch. Confirm with proctor if they would accept
> that solution for routing part though. They may prefer some other
> approach to solving the problem.
>
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-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net