From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 27 Nov 2006 13:31:03 +0100 From: Lutz Jaenicke Message-ID: <20061127123102.GA15052@innominate.com> References: <20061126060423.50525.qmail@web54212.mail.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: <20061126060423.50525.qmail@web54212.mail.yahoo.com> Subject: Re: [Bridge] Passing vlan tagged packets through linux bridge List-Id: Linux Ethernet Bridging List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: bridge@lists.osdl.org On Sat, Nov 25, 2006 at 10:04:23PM -0800, kasra kangavari wrote: > Dear Roman > =20 > If I don't use trunk over linux bridges(packets without vlan tag) then I= can ping more than 1500bytes(MTU).the problem is vlan tagged packets. r u = sure about jumbo frames that solve this problem ? Did you have a look at the MTUs of the interfaces? If you need to support VLAN tagged frames, at least the physical interfaces need to accept frames with additional 4 bytes on the wire. If this is not handled in the driver the 1500+ETH+VLAN-frames will already be dropped (not even be received) at the physical interfaces. You may have to allow an MTU of 1504 for this reason. Regards, Lutz --=20 Dr.-Ing. Lutz J=E4nicke CTO Innominate Security Technologies AG /protecting industrial networks/ tel: +49.30.6392-3308 fax: +49.30.6392-3307 Albert-Einstein-Str. 14 D-12489 Berlin, Germany www.innominate.com --------------------------------------------------------------- Visit us at the SPS/IPC/Drives in Nuernberg 28 - 30 November 2006, Hall 9, Stand 9-125 ---------------------------------------------------------------