From owner-freebsd-questions Mon Aug 21 17:56: 5 2000 Delivered-To: freebsd-questions@freebsd.org Received: from pop.hccnet.nl (pop.hccnet.nl [193.172.127.94]) by hub.freebsd.org (Postfix) with ESMTP id 6852B37B424 for ; Mon, 21 Aug 2000 17:55:57 -0700 (PDT) Received: from parmenides.utp.net by pop.hccnet.nl via uds141-124.dial.hccnet.nl [193.173.124.141] with ESMTP id CAA07226 (8.8.5/1.13); Tue, 22 Aug 2000 02:55:51 +0200 (MET DST) Received: from localhost (janko@localhost) by parmenides.utp.net (8.9.3/8.9.3) with ESMTP id CAA02322; Tue, 22 Aug 2000 02:58:37 GMT (envelope-from janko@parmenides.utp.net) Date: Tue, 22 Aug 2000 02:58:37 +0000 (GMT) From: Janko van Roosmalen To: "Larry Skarpness Jr." Cc: freebsd-questions@FreeBSD.ORG Subject: Re: ARP issues with 2 or more multi-homed interfaces on same physical LAN In-Reply-To: <001901c00bcf$df9b0bf0$0a00a8c0@chainsoft.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Mon, 21 Aug 2000, Larry Skarpness Jr. wrote: > > Sometimes it is necessary to place two or more network cards in the same > machine and have them wired to the same physical LAN. There could be > several reason's for doing this. After researching this problem it is > apparent that others have made the same explicit decision to do so. This > causes frequent messages to appear in the console and log like... > /kernel: arp:192.168.0.20 is on dc0 but got reply from 00:e0:98:71:63:fd > on ed0 > Normally a message like this usually means than 2 NIC's have the same IP number or respond to the same IP number. All NIC's should have a different IP number, even if they are in the same hosts. In the troubleshooting chapter of Craig Hunt's "TCP/IP Network Administration" a similar incident is handled and solved. The first 3 bytes of the MAC indicate the manufacturer of the card "00:e0:98". You can download the "Ethernet vendor list" from www.ieee.org (oui.txt IIRC). Janko To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message