Date: Fri, 28 May 1999 02:51:06 -0700 (PDT) From: Ken Lui <klui@cup.hp.com> To: questions@freebsd.org Cc: klui@cup44ux.cup.hp.com (Ken Lui) Subject: Question about arp entry in /var/log/messages Message-ID: <199905280951.CAA01539@cup44ux.cup.hp.com>
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Hi all, I've been using Linux for around 2.5 years with the same hardware setup and haven't had the following type of messages in my system messages log before, only when I started using FreeBSD a couple of days ago. Apparently, it is a very common occurrence happening to people who aren't well versed in computer networking. I am definitely not a networking expert. Here's what I want to do: I have an ISDN router that's on net 15 (15.75.136.169 with netmask 255.255.248.0) which I use to communicate to the "outside" world. I also have a bunch of machines that I don't want to be on net 15 but rather on net 10. Although I haven't had IP masquerading set up yet, I wish to have some of these net 10 machines be able to access net 15 through my FreeBSD box. Physically, things look like this: [isdn] |___10bT___[hub] |___10b2___[Mac]___10b2___[FreeBSD w/ 2 ethernet cards] | |___10b2___[NeXT]___10b2___[NeXT] My limited understanding is when I was running Linux, I just set up my box so that one of its ethernet cards is on net 10 while the other is on net 15 and I can just set up the routes and be done with it. It has worked fairly well. On FreeBSD it also works but I get entries such as the following in /var/log/messages: May 28 02:25:37 black /kernel: arp: 15.75.136.169 is on ed1 but got reply from 00:40:f9:13:69:d5 on ed2 Reading some entries in dejanews, should I have the following physical network topology? [isdn] |___10bT___[hub] |___10b2___[FreeBSD ethernet card 1] (net 15) [FreeBSD ethernet card 2] (net 10) |___10b2___[Mac]___10b2___[NeXT]___10b2___[NeXT] Essentially, have separate wires connecting net 10 systems vs. net 15 machines. Problem is my Mac can be multihomed so one ethernet interface can be net 15 and net 10--i.e. works fine now. Are these messages benign for my setup or does it indicate a more serious problem? What's the proper way to do what I want? Searching the FreeBSD mailing list didn't turn up references I need. And unfortunately there are no FreeBSD how-tos. rc.conf's network section ========================= hostname="black.tmpest1.org" gateway_enable="YES" ifconfig_ed1="inet 15.75.136.174 netmask 255.255.248.0" ifconfig_ed2="inet 10.0.0.1 netmask 255.255.255.0" network_interfaces="ed2 ed1 lo0" defaultrouter="10.0.0.1" static_routes="hp" route_hp="-net 15.0.0.0 15.75.136.169" resolv.conf =========== nameserver 15.255.208.3 search cup.hp.com,tmpest1.org netstat -r ========== Routing tables Internet: Destination Gateway Flags Refs Use Netif Expire default 10.0.0.1 UGSc 0 0 ed2 10/24 link#2 UC 0 0 ed2 10.0.0.1 0:80:c8:fd:88:d UHLW 1 4 lo0 15 15.75.136.169 UGSc 7 6 ed1 15.75.136/21 link#1 UC 0 0 ed1 15.75.136.169 0:40:f9:13:69:d5 UHLW 7 27 ed1 932 127.0.0.1 127.0.0.1 UH 1 6 lo0 Regards, Ken -- Ken Lui 19111 Pruneridge Avenue klui@cup.hp.com Cupertino, CA 95014-0795 USA Information Solutions & Services 1.408.447.3230 FAX 1.408.447.0218 Views within this message may not be those of the Hewlett-Packard Company To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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