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Date:      Tue, 17 Jul 2001 10:59:37 -0400 (EDT)
From:      "dev.org" <dev@wserv8.inetu.net>
To:        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:  <Pine.BSF.4.21.0107171059090.36833-100000@wserv8.inetu.net>
In-Reply-To: <NABBJFHHHCHMHGALIFEFAEDCHCAA.eric@ericwalters.com>

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I will find out about upgrades, but I do not think any have been done.

I think we use a cross-over cable, but I will check on that as well.

Our cat is a 6509.

On Tue, 17 Jul 2001, Eric Walters wrote:

> 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
> >
> 
> 


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