Re: [foxboro] network storm

From: Kevin Fitzgerrell <fitzgerrell@xxxxxxxxx>
To: foxboro@xxxxxxxxxxxxx
Date: Fri, 6 Feb 2009 08:14:37 +0900
That's interesting, we had a network storm on our network yesterday too.
Ours looks like it was initiated on the CBLAN side - we had a fiber core
fail between two active concentrators and a couple of soft errors due to
high loading, and it looks like the NFD system started thrashing.  Helping
out NFD by shutting the "A" side of the CBLAN down brought things back to
normal fairly quickly.
Our network storm affected all MESH workstations, some CBLAN workstations
and some peer to peer connections.  Nodebus workstations trying to call
displays from control stations on their local nodebus were smurfed as well
as workstations calling displays across the networks.

Regards,

Kevin FitzGerrell

On Fri, Feb 6, 2009 at 4:26 AM, Michael Jaudon <mjaudon2@xxxxxxxxx> wrote:

> We experienced a first for our plant site today.  We had all workstations,
> on the mesh side of the network, to "smurf" out.  Upon visually checking
> our
> ZCP270s I noticed that of each of the ZCP270s had gone single with it's
> associated FT module gone to red/green.
> Looking at the switches...we have 3 sets of switches including the root
> switch.  On each of the switches the lights were all flashing rapidly and
> in
> unison.  It wasn't until we cycled the power on the root switches (one at a
> time) that the network came back.
>
> Talking to our field service rep...he said the situation we had was a
> "network storm".  The cause is unknown.
>
> My question is has anyone ever experienced a "network storm" on a mesh
> network and if so what caused it?
>
> Our mesh network has been in operation since Oct 2008 and this is the first
> issue we have had with it.
>
> We are running a Mesh Network version 8.4.1.
>
> --
> Mike Jaudon
> Tronox, LLC
> Hamilton, MS
>
>
>
>
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References:
- [foxboro] network storm
  - From: Michael Jaudon
Re: [foxboro] network storm

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