Date: Tue, 22 Aug 2000 02:58:37 +0000 (GMT) From: Janko van Roosmalen <janko@compuserve.com> To: "Larry Skarpness Jr." <larry@chainsoft.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: ARP issues with 2 or more multi-homed interfaces on same physical LAN Message-ID: <Pine.BSF.4.10.10008220246190.2305-100000@parmenides.utp.net> In-Reply-To: <001901c00bcf$df9b0bf0$0a00a8c0@chainsoft.com>
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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
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