From owner-freebsd-net Fri Feb 4 2:25:48 2000 Delivered-To: freebsd-net@freebsd.org Received: from euitt.upm.es (haddock.euitt.upm.es [138.100.52.102]) by builder.freebsd.org (Postfix) with ESMTP id 7472D4459 for ; Fri, 4 Feb 2000 02:25:32 -0800 (PST) Received: from localhost (pjlobo@localhost) by euitt.upm.es (8.9.3/8.9.3) with ESMTP id LAA03803; Fri, 4 Feb 2000 11:23:52 +0100 (MET) Date: Fri, 4 Feb 2000 11:23:51 +0100 (MET) From: "Pedro J. Lobo" To: Garrett Wollman Cc: "Matthew N. Dodd" , freebsd-net@FreeBSD.ORG Subject: Re: 802.1Q VLANs In-Reply-To: <200002032025.PAA63379@khavrinen.lcs.mit.edu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, 3 Feb 2000, Garrett Wollman wrote: >< said: > >> I'm not sure we want to have the drivers always accept large >> packets, just because we've compiled a kernel with VLAN devices in it. > >Not because we've compiled a kernel with VLAN devices in it; because >we've compiled a kernel with a NIC driver that supports large packets. But the drivers won't accept *all* large packets! I mean, the driver must make sure that the NIC won't drop oversized frames so it can examine them, but if it sees a 1522-byte frame that doesn't belong to a 802.1Q VLAN it will drop that frame (as well as any frame longer than 1522 bytes). To put it in short, no frame with more than 1500 bytes of payload will be accepted. Cheers, Pedro. -- ------------------------------------------------------------------- Pedro José Lobo Perea Tel: +34 91 336 78 19 Centro de Cálculo Fax: +34 91 331 92 29 E.U.I.T. Telecomunicación e-mail: pjlobo@euitt.upm.es Universidad Politécnica de Madrid Ctra. de Valencia, Km. 7 E-28031 Madrid - España / Spain To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message