Date: Tue, 17 Jul 2001 09:51:23 -0500 From: "Eric Walters" <eric@ericwalters.com> To: "dev.org" <dev@wserv8.inetu.net>, "Eric Walters" <eric@ericwalters.com> Cc: <freebsd-isp@FreeBSD.ORG> Subject: RE: HELP NEEDED. :) ARP problems - ARP incomplete showing up on our network Message-ID: <NABBJFHHHCHMHGALIFEFAEDCHCAA.eric@ericwalters.com> In-Reply-To: <Pine.BSF.4.21.0107171013580.33138-100000@wserv8.inetu.net>
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Any recent IOS upgrades on the routers or switches? I would begin by making sure the MAC address shows up in on the proper port on the switch it is plugged into. Once that is verified make sure the uplink switch shows that MAC address on the uplink port. Is the uplink port a true uplink or is it a cross-over? If am pretty sure the problem will end up being on the switch end and not the router. What is your CAT, 4000,5000 etc...? -----Original Message----- From: dev.org [mailto:dev@wserv8.inetu.net] Sent: Tuesday, July 17, 2001 9:15 AM To: Eric Walters Cc: freebsd-isp@FreeBSD.ORG Subject: RE: HELP NEEDED. :) ARP problems - ARP incomplete showing up on our network Dear Eric, Thank you. We have Bay303 and 310's where our servers are connected. These switches uplink to our main Bay 350 which uplinks to our CAT where our routers are connected. We do use crossover cables. This problem is not limited to a single switch, but accross both 303 and 310 switches. Most of this stuff has been working fine for quite some time. Thanks so much. :) -Dev On Tue, 17 Jul 2001, Eric Walters wrote: > I have seen this problem on Cisco switches in the past. Do you have any > hubs plugged into the switches or have them cascaded with cross-over cables > or anything? Have you checked the MAC Address table on the switches to make > sure the entries are still there? I would suspect the switches first. Have > you done any router or switch code upgrades recently? > > > > -----Original Message----- > From: owner-freebsd-isp@FreeBSD.ORG > [mailto:owner-freebsd-isp@FreeBSD.ORG]On Behalf Of Dev > Sent: Tuesday, July 17, 2001 8:08 AM > To: freebsd-isp@freebsd.org > Subject: HELP NEEDED. :) ARP problems - ARP incomplete showing up on our > network > > > > We have been having a problem for the last 24-36 hours on our network. > > We have about 350 servers (50% FreeBSD, 50% NT/2000 and a few Linux) > > Servers have started to be inaccessible through our router (and > sometimes > through other servers). > > The ARP table in our router will show an INCOMPLETE next to the Arp > entry > which is having trouble. > > These problems surface about every 30 minutes and servers will go down > about every 4 hours. > > This problem seems to affect ONLY FreeBSD servers (and 2 Cobalt/Linux > servers). In total, about 20-30 servers. > > Does anyone have any ideas on what we can check? While our network is > largely flat, we do route blocks of addresses directly to servers, our > arp > table in our router is fairly small (about 500 entries). > > Any help would be greatly appreciated. We have tried a lot, but cannot > figure out what is causing the problem. We did not have this problem > before, and many of the servers affected have been running for 1-2 years > > without any problems. > > We use 3COM and Intel NIC's, Nortel switches (303, 310) and a 7206VXR > routers. > > Thanks. > -Dev > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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