From owner-freebsd-net@FreeBSD.ORG Tue Mar 15 17:17:04 2005 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id AA85616A4CE for ; Tue, 15 Mar 2005 17:17:04 +0000 (GMT) Received: from hub.org (hub.org [200.46.204.220]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4638943D5D for ; Tue, 15 Mar 2005 17:17:04 +0000 (GMT) (envelope-from scrappy@hub.org) Received: from localhost (unknown [200.46.204.144]) by hub.org (Postfix) with ESMTP id 234231293AB; Tue, 15 Mar 2005 13:17:03 -0400 (AST) Received: from hub.org ([200.46.204.220]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 07683-09; Tue, 15 Mar 2005 17:17:02 +0000 (GMT) Received: from ganymede.hub.org (blk-222-46-186.eastlink.ca [24.222.46.186]) by hub.org (Postfix) with ESMTP id B05831293A9; Tue, 15 Mar 2005 13:17:02 -0400 (AST) Received: by ganymede.hub.org (Postfix, from userid 1000) id 458835CFD5; Tue, 15 Mar 2005 13:17:02 -0400 (AST) Received: from localhost (localhost [127.0.0.1]) by ganymede.hub.org (Postfix) with ESMTP id 44AEE5C307; Tue, 15 Mar 2005 13:17:02 -0400 (AST) Date: Tue, 15 Mar 2005 13:17:02 -0400 (AST) From: "Marc G. Fournier" To: Nikolay Kryukov In-Reply-To: <155155568625.20050315193204@rt.mipt.ru> Message-ID: <20050315131401.U92893@ganymede.hub.org> References: <20050315011200.G92893@ganymede.hub.org> <155155568625.20050315193204@rt.mipt.ru> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Virus-Scanned: by amavisd-new at hub.org cc: freebsd-net@freebsd.org Subject: Re: High ping latency using two ethernet under FreeBSD 4.11 ... X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 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, 15 Mar 2005 17:17:04 -0000 On Tue, 15 Mar 2005, Nikolay Kryukov wrote: > It's the case of incorrect configuration. Equal mac addresses must not > exist in different ports on the same vlan on catalyst switches. They may > cause problems like: 'k, now I'm confused ... I hadn't noticed that, but how is it that they are 'equal'? I take it that 00:0b:bf:42:a8:06 is the MAC on the switch itself, since that machines MAC addresses are: ether 00:07:e9:05:1b:2e ether 00:07:e9:05:1b:2f does the cisco switch 'share' a mac across all ports? > http://www.ciscotaccc.com/lanswitching/showcase?case=K19174025 > and, consequently, high latency. > > MGF> Testing my network, I just noticed the following: > > MGF> --- 200.46.204.1 ping statistics --- > MGF> 4 packets transmitted, 4 packets received, 0% packet loss > MGF> round-trip min/avg/max/stddev = 399.664/407.119/420.315/8.267 ms > > MGF> --- 200.46.208.1 ping statistics --- > MGF> 3 packets transmitted, 3 packets received, 0% packet loss > MGF> round-trip min/avg/max/stddev = 373.045/409.266/453.402/33.280 ms > > MGF> 400ms to my default router seems a wee bit high ... > > MGF> I'm suspecting that it has to do with: > > MGF> Mar 15 01:13:28 neptune last message repeated 10 times > MGF> Mar 15 01:13:28 neptune /kernel: arp: 200.46.204.1 is on > MGF> em0 but got reply from 00:0b:bf:42:a8:06 on em1 > MGF> Mar 15 01:13:28 neptune /kernel: arp: 200.46.208.1 is on > MGF> em1 but got reply from 00:0b:bf:42:a8:06 on em0 > > MGF> In order to provide network redundancy, and simplify our scripting, with > MGF> have one network bound to one ethernet port, and the other network bound > MGF> to the second one on the same machine ... > > MGF> I'm plugging everything into a Cisco 2924 ... is there some way, either on > MGF> the FreeBSD side, or Cisco, of 'cleaning this up'? > > MGF> ---- > MGF> Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) > MGF> Email: scrappy@hub.org Yahoo!: yscrappy ICQ: 7615664 > MGF> _______________________________________________ > MGF> freebsd-net@freebsd.org mailing list > MGF> http://lists.freebsd.org/mailman/listinfo/freebsd-net > MGF> To unsubscribe, send any mail to > MGF> "freebsd-net-unsubscribe@freebsd.org" > > _______________________________________________ > 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" > ---- Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: scrappy@hub.org Yahoo!: yscrappy ICQ: 7615664