[isapros] Re: OT:Network Porblems
- From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
- To: <isapros@xxxxxxxxxxxxx>
- Date: Wed, 19 Jul 2006 22:04:16 -0500
It's important to know exactly what the errors are before replacing
hardware. Really need to see what's happening on the wire too.
Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
MVP -- ISA Firewalls
> -----Original Message-----
> From: isapros-bounce@xxxxxxxxxxxxx
> [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Greg Mulholland
> Sent: Wednesday, July 19, 2006 10:02 PM
> To: isapros@xxxxxxxxxxxxx
> Subject: [isapros] Re: OT:Network Porblems
>
> I dont actually know what the definition is. They havent been
> able to tell
> me what the exact error means, no source ip or nothing.
>
> They were getting CRC errors and frame errors in the log but
> they seemed to
> have cleared up this morning.
>
> ----- Original Message -----
> From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
> To: <isapros@xxxxxxxxxxxxx>
> Sent: Thursday, July 20, 2006 12:55 PM
> Subject: [isapros] Re: OT:Network Porblems
>
>
> What is the definition of an "input error" in this scenario?
>
> Thomas W Shinder, M.D.
> Site: www.isaserver.org
> Blog: http://blogs.isaserver.org/shinder/
> Book: http://tinyurl.com/3xqb7
> MVP -- ISA Firewalls
>
>
>
> > -----Original Message-----
> > From: isapros-bounce@xxxxxxxxxxxxx
> > [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Greg Mulholland
> > Sent: Wednesday, July 19, 2006 4:54 PM
> > To: isapros@xxxxxxxxxxxxx
> > Subject: [isapros] OT:Network Porblems
> >
> > OK i need some eyes on this one and since jim asked an
> > exchange question ill
> > take a stab.
> >
> > Previously the client had a 2mb Internet link with ye olde
> > cisco router, two
> > vlans. Two weeks ago they upgraded to a 4mb link with a brand
> > spanker of a
> > new cisco router, same 2 vlans. The cabling system was all the same
> > basically i had to do was pull the cables out from the old
> > router and stick
> > them into the new router, reconfigure the dhcp scopes and any
> > static devies
> > on the networks and all is good. Well vlan1 has worked a
> > treat since, which
> > brings me to vlan2.
> >
> > The client reported "no internet access" a while ago after a
> > bit of trouble
> > shooting and a cut to the chase the guys who manage the
> > router (externally)
> > tell me they are seeing 3-6 million input errors on vlan2's
> > interface log.
> > Rebooting the single switch attached to vlan2 fixes the
> > problem as it resets
> > the int but the errors will start occuring shortly after and
> > eventually
> > flood the interface and it drops again.
> >
> > OK so they tell me that its something on the vlan2 network
> > thats causing it,
> > i on the phone with the router guy one by one shutdown each
> > device then
> > unplug each cable from the switch then turn everything back
> > on one by one,
> > hoping he will say "ahh there it is what did you just turn
> > on". Mind you i
> > thought it is a long shot that one pc could genearate that
> > much traffic.
> > Anyhow i borrowed another switch of the same model and
> > plugged that in for
> > two days, same problem, i tried a different make swicth, same
> > problem, we
> > replaced the cables between the rooms as they are separated
> > by some 40 mtrs,
> > all the small patach cables, cables on the router, had them
> > out the other
> > day to reconfigure the interface and replace the four port
> > module, still the
> > same!!!!!!! Last night we turned everything off bar the
> > switch with the link
> > cable to the router plugged in and the router itself and its
> > still the same.
> > we have ordered a brand new switch which every network gets
> > given with this
> > setup, all configured to their specs in the hope that maybe
> > one day someone
> > screwed with ours and didnt document it. If that doesnt fix
> > it im lost. Has
> > anyone got any more ideas.
> >
> > My guts feeling is somethig the router guy told me the other
> > day in that he
> > had to force the router to 100half because that what the
> > swicth was telling
> > him it had, yet the swicth was all autosensing. I keep
> > thinking that its a
> > speed mismatch which can cause the links to drop. They reckon
> > its not but i
> > have my doubts
> >
> > If anyone has got any ideas, stupid or otherwise im all ears.
> >
> > Thanks Heaps
> > Greg
> >
> > p.s the pcs have been scanned for viruses and spyware before
> > i got to this
> > stage.
> >
> >
> >
> >
>
>
>
>
>
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