Re: Help requested with RIPv1 lan issues (UK school)
From: andy (andy_at_login2.net)
Date: 12/11/04
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Date: Sat, 11 Dec 2004 10:59:05 -0000
"Bill Grant" <not.available@online> wrote in message
news:#asx0Gy3EHA.1292@TK2MSFTNGP10.phx.gbl...
> RIP Listener is an option in XP that allows the client machine to
listen
> for RIP messages from routers. It is installed from the Windows Add
Software
> | Networking window. It is not usually installed by default.
>
> As a first step, check one machine each which does/doesn't do this and
> check that RIP Listener is present/absent. At least then you will know
what
> is causing the problem.
>
> I don't really know whether this can be controlled by group policy or
> something similar. I would certainly want it turned off. I like the
routers
> to do the routing, not the clients!
>
I think we have clients with the RIP option installed that are not creating
storms of RIP v1 requests. Really what I am after an answer to is whether
this is normal behaviour for the XP RIP Listener. Probably the fact that all
our RIP enabled clients don't do this is significant but I could be wrong.
Should RIP requests v1 from a single listener have the effect of slowing
pings from 1-4pms up to 170ms on a fully switched network? Should a single
client saturate the LAN for 3 to 4 seconds at a time with this traffic?
What are the circumstances when a XP listener would feel the need to
Broadcast (I presume it is a broadcast) this traffic to the world?
Regards,
Andy.
> "andy" <andy@login2.net> wrote in message
> news:ehZlphx3EHA.3120@TK2MSFTNGP12.phx.gbl...
> > Hi,
> > I am looking for some guidance and comments on a issue we are seeing on
> > our
> > school network.
> >
> > Scenario: 9 servers, 3 DC's all Server 2003 standard or Enterprise. One
> > ISA
> > 2000 server, Exchange 2003 server, SMS 2003, MOM 2005. Full SP. 650 XP
Pro
> > clients some SP2 others SP1.
> >
> > Clients are grouped together in sets of 15 or 30 depending on room size,
> > each room is connected via a 100MB (cat 5e) switched network to a
gigabit
> > backbone (all fibre). We have two sites linked by Gigabit fibre. Our
core
> > switches are 3Com with DLink switches in the classrooms.
> >
> > We use addresses in the range 192.168.x.y on our network where x =
> > classroom
> > number and y=pc within the classroom, we have a persistent route
> > configured
> > on each client that points to the 192.168.2.0 subnet which is where our
> > servers live.
> >
> > Our servers have static routing entries to all our subnets.
> >
> >
> > We have suffered several network issues over the last three months:-
> >
> > AD replication issues, high packet loss, loss of mapped user drives.
> >
> > So we replaced our Allied Telesyn switches with new 3Com, replaced our
> > site
> > to site fibre and have had new links pulled in from the cabs to our
server
> > rooms.
> >
> > We rebuilt AD and the servers are replicating perfectly, however we
still
> > have odd students who fail to have their drive mapped at login or who
> > loose
> > access to their drive whilst logged in. There appears to be no pattern
as
> > this occurs at random. Logging out and logging back in always restores
the
> > users access to mapped drives. The event log on the clients indicate
that
> > the share is offline.
> >
> > So, I have been monitoring our LAN using Ethereal and I am seeing bursts
> > of
> > RIP v1 request traffic from our clients that cause our normal client to
> > server pings to rise from <4ms to around 170ms with the occasional
> > 'request
> > timed out' occurring. Watching the wire it seems that each RIP request
> > lasts
> > around 3 or 4 seconds. Sometimes in the space of 1/2 hr we may see 4 or
5
> > clients making similar broadcasts, sometimes we see several clients
making
> > the same broadcast at the same time. We have no idea why some clients
send
> > the RIP request traffic and others don't.
> >
> > Could this be the cause of students loosing their mapped drives by
hogging
> > the network? Do we need to setup RRAS on a server to deal with these
> > requests? or should we just disable RIP on the clients?
> >
> > Is there a easy way to disable RIP where it installed using group policy
> > or
> > similar without visiting each XP client?
> >
> > I did Google for answers and tried Usenet too. Any help is gratefully
> > received.
> >
> > Andy.
> >
> >
> >
> >
>
>
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