Subject: Re: 802.1Q & ETHER_MAX_LEN
To: Manuel Bouyer <firstname.lastname@example.org>
From: Jason R Thorpe <email@example.com>
Date: 10/03/2000 07:17:33
On Tue, Oct 03, 2000 at 03:12:10PM +0200, Manuel Bouyer wrote:
> Is there other case where we need something like this (different MTU at
> the hardware level depending on the frame type) ? If not maybe we could just
> hack something simpler: change ifnet (or maybe, really if_data) to include
> the max frame length the HW can do; which may be bigger than
> if_mtu + if_hdrlen. Then extra encap layers such as 802.1Q can use it to
> recompute a MTU. Anyway we won't be able to have a completely clean separation
> between 802.1Q and ethernet.
How is this problem really any different than e.g. FDDI using a different
MTU for IP than it does for anything else?
-- Jason R. Thorpe <firstname.lastname@example.org>