Date: Fri, 4 Jun 1999 15:39:57 -0700 (PDT) From: Doug White <dwhite@resnet.uoregon.edu> To: Ken Lui <klui@cup.hp.com> Cc: questions@freebsd.org Subject: Re: Question about arp entry in /var/log/messages Message-ID: <Pine.BSF.4.03.9906041533390.13154-100000@resnet.uoregon.edu> In-Reply-To: <199906040728.AAA29672@cup44ux.cup.hp.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, 4 Jun 1999, Ken Lui wrote: > > > Jun 1 21:14:05 black /kernel: arp: 10.0.0.1 is on lo0 but got reply from > > > 00:80:c8:fd:88:0d on ed1 > > > > _lo0_? Hm! Can I see ifconfig -a, please? Try to keep the whole message > > around since I'm trying to keep track of this. > > Yeah, I thought about that but did so after I sent the last reply. > > ifconfig -a > ed1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 15.75.136.174 netmask 0xfffff800 broadcast 15.75.143.255 > ether 00:80:c8:fd:90:ae > ed2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 10.0.0.1 netmask 0xffffff00 broadcast 10.0.0.255 > ether 00:80:c8:fd:88:0d > lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 > inet 127.0.0.1 netmask 0xff000000 Okay, this is quite helpful, thanks! I thought you may have misconfigured lo0 but it doesn't appear to be the case. That's an odd netmask for ed1. 255.255.252.0? A typo, perhaps? > > Do you have proxy arp turned on in the cisco? > > I checked it and it doesn't have proxy arp capability. I did notice > that its netmask is incorrect for its IP. IT did this for me so I > never questioned it. Changing its netmask didn't eliminate those > entries. The frustrating thing is these messages are have a certain > delay before they show up in /var/log/messages. Well, screwed up netmasks will cause these sorts of problems, so double check your netmasks all the way around. > Odd how after I've ping'ed some of these IPs, I get the following > with netstat -nr > > Routing tables > > Internet: > Destination Gateway Flags Refs Use Netif Expire > default 15.75.136.169 UGSc 4 13 ed1 > 10/24 link#2 UC 0 0 ed2 > 10.0.0.1 0:80:c8:fd:88:d UHLW 0 28 lo0 This is downright wierd. Have you rebooted recently? This should not be attached to lo0. On my ssytems it's attached to the proper network interface. > 10.0.0.2 link#2 UHLW 0 2 ed2 > 10.0.0.3 link#2 UHLW 0 2 ed2 > 10.0.0.4 8:0:7:6f:1d:fe UHLW 0 15 ed2 828 > 15.75.136/21 link#1 UC 0 0 ed1 > 15.75.136.169 0:40:f9:13:69:d5 UHLW 5 4 ed1 764 > 15.75.136.174 0:80:c8:fd:90:ae UHLW 0 24 lo0 > 127.0.0.1 127.0.0.1 UH 1 4 lo0 > > Maybe a dumb and naive question but... when I was running Linux I > didn't have to run gated or routed. Should I be running it? No, absolutely not. > > > While ed2 (net 10) has the following (start of dump): > > > 21:11:48.500727 ce573230.cup.hp.com.1040 > 15.75.12.3.domain: 1785+ (60) > > > 21:11:48.572032 ce573230.cup.hp.com.1041 > 15.75.12.3.domain: 6263+ (43) > > > > ?? What is that stuff going that way? > > > > Let me clarify this. The interfaces are listed next to the IPs they're > > assigned, if I'm getting you right. > > Yes. For instance, ce573230 should be on ed1, black should be on ed2. > However, green is multi-homed with 1 ethernet interface so it really > rests on both ed1's and ed2's network; but the confusing thing for > me is they both share one wire. No, this is *wrong*. No one behind the router should be responding to 15.* addressing. Turn off the multihosting on green and plug it into only one network. It may be gatewaying the network data around and causing the loop I'm seeing. Doug White Internet: dwhite@resnet.uoregon.edu | FreeBSD: The Power to Serve http://gladstone.uoregon.edu/~dwhite | www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.03.9906041533390.13154-100000>