From owner-freebsd-net@FreeBSD.ORG Tue Jan 13 15:53:21 2009 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 560B810656E5 for ; Tue, 13 Jan 2009 15:53:21 +0000 (UTC) (envelope-from aman.jassal@esigetel.fr) Received: from mail.esigetel.fr (venus.esigetel.fr [192.134.106.8]) by mx1.freebsd.org (Postfix) with ESMTP id D22098FC1B for ; Tue, 13 Jan 2009 15:53:20 +0000 (UTC) (envelope-from aman.jassal@esigetel.fr) Received: by mail.esigetel.fr (Postfix, from userid 65534) id 6754A1052B; Tue, 13 Jan 2009 16:35:08 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.1.8 (2007-02-13) on venus.esigetel.avon X-Spam-Level: X-Spam-Status: No, score=-4.0 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=unavailable version=3.1.8 Received: from localhost (localhost [127.0.0.1]) by mail.esigetel.fr (Postfix) with ESMTP id 29D5C10541; Tue, 13 Jan 2009 16:35:07 +0100 (CET) X-Virus-Scanned: amavisd-new at esigetel.fr Received: from mail.esigetel.fr ([127.0.0.1]) by localhost (venus.esigetel.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id j3guYKCEdf67; Tue, 13 Jan 2009 16:35:01 +0100 (CET) Received: from webmail.esigetel.fr (neo.ecampus.avon [192.168.106.14]) by mail.esigetel.fr (Postfix) with ESMTP id 95A8C1052A; Tue, 13 Jan 2009 16:35:01 +0100 (CET) Received: from 193.49.124.107 (proxying for unknown) by webmail.esigetel.fr with HTTP; Tue, 13 Jan 2009 16:35:01 +0100 (CET) Message-ID: <52831.193.49.124.107.1231860901.squirrel@webmail.esigetel.fr> In-Reply-To: References: <5D49E7A8952DC44FB38C38FA0D758EAD0173629B@mtlexch01.mtl.com> Date: Tue, 13 Jan 2009 16:35:01 +0100 (CET) From: "JASSAL Aman" To: "Eitan Shefi" User-Agent: SquirrelMail/1.5.1 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit Cc: freebsd-net@freebsd.org Subject: Re: When configuring 2 VLANs to be on the same subnet, only one works. X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Jan 2009 15:53:21 -0000 Hello Eitan, I am no expert but I believe Stefan is right, your having a netmask of 255.0.0.0 does look strange. The way I see it, I think you are trying to configure 2 IP addresses belonging to the same subnet (91.0.0.0/8) on your interface, but only the first address is taken into account (91.154.12.5 on sw259 and 91.154.12.6 on sw260). Hence ping 91.154.12.6 from sw259 fails. Setting a netmask of 255.255.0.0 as Stefan suggested should solve your problem. Kind regards, Aman Jassal Le Mar 13 janvier 2009 15:03, Stefan Lambrev a écrit : > Greetings, > > > For me your configuration looks invalid. Try with netmask 255.255.0.0 > The question here is why freebsd allow this. > > > On Jan 13, 2009, at 3:09 PM, Eitan Shefi wrote: > > >> I'm testing a NIC driver. >> I use 2 directly connected FreeBSD-7.0 hosts. >> When I create 2 VLANs for the same interface (mtnic0), on each host, >> and configure the VLANs on each host to be on the same subnet: ping works >> only to one of the VLANs. >> >> I run: >> On sw259: >> /sbin/ifconfig vlan1 create vlan 1 vlandev mtnic0 >> /sbin/ifconfig vlan2 create vlan 2 vlandev mtnic0 >> /sbin/ifconfig vlan1 91.154.12.5 netmask 255.0.0.0 >> /sbin/ifconfig vlan2 91.155.12.5 netmask 255.0.0.0 >> >> >> On sw260: >> /sbin/ifconfig vlan1 create vlan 1 vlandev mtnic0 >> /sbin/ifconfig vlan2 create vlan 2 vlandev mtnic0 >> /sbin/ifconfig vlan1 91.154.12.6 netmask 255.0.0.0 >> /sbin/ifconfig vlan2 91.155.12.6 netmask 255.0.0.0 >> >> >> Now on sw259 run: >> ping 91.154.12.6 - works. ping 91.155.12.6 - does not work. >> >> I saw the same behavior also when running via a different NIC. >> >> >> >> Is this expected ? >> >> >> >> Thanks, >> Eitan. >> _______________________________________________ >> freebsd-net@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-net >> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >> > > -- > Best Wishes, > Stefan Lambrev > ICQ# 24134177 > > > > > > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > >