Date: Sun, 10 Oct 1999 05:30:19 -0400 From: Allen Cleveland <allenc@mindsieve.com> To: "Edirol" <edirol@anime.ca>, <freebsd-questions@FreeBSD.ORG> Subject: Re: kernel arp errors Message-ID: <3.0.5.32.19991010053019.007ebc00@mindsieve.com> In-Reply-To: <001301bf12eb$cbb34040$0300a8c0@anime.ca>
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At 02:50 AM 10/10/99 -0400, Edirol wrote: >Hi, > >Once in a while I seem to be getting this error message in my logs. > >Oct 9 21:32:58 schala /kernel: arp: 192.168.0.2 is on ed0 but got reply >from 00:40:05:a9:88:45 on ed1 > >Sometimes 192.168.0.X comes up too. I suspect this has something to do >with the @home cable service that I'm using. Does anyone know how I can >stop this error from reoccuring? While I may not have the techinical jargon to explain whats happening, I can give you a general idea. Basically, someone on your subnet has thier 'modem' plugged into a hub. All the LAN traffic is goin out over the cable modem connection instead of being properly routed within the LAN itself. What your seeing is someone else's computer telling your subnet that it has the 192.168.0.2 address, and arp see's that IP address is on your LAN. You can try to send your ISP the message, and tell them what I've said here, and they *might* take the time to figure out who has an incorrectly set up LAN. Otherwise, you could assign your LAN some different non routed IP's in the 192.168 subnet, such as 198.168.34.12 . As far as I know, there isn't a way to filter this message out. In any event, it's better to know that someone has a misconfigured LAN, than not know. >ed0 is for my local network at home and ed1 is my cable modem. > >The netmask for my ed1 device is set to 255.255.252.0 as that was what was >provided by @home. > >Thanks, >- Will > >Here is my ifconfig -a output: > >ed0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255 > ether 00:80:c6:f8:98:6f >ed1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 24.112.80.104 netmask 0xfffffc00 broadcast 24.112.83.255 > ether 00:e0:29:16:71:7f >lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 > inet 127.0.0.1 netmask 0xff000000 -- Allen Cleveland allenc@mindsieve.com There is no try. Do, or do not do, but no try. -Yoda To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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