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<== Date ==> <== Thread ==>

Subject: RE: Buffer problems
From: "Ernest L. Williams Jr." <[email protected]>
To: Mark Rivers <[email protected]>
Cc: Andrew Johnson <[email protected]>, [email protected], [email protected], [email protected], smtp lanzirotti <[email protected]>
Date: Fri, 26 Mar 2004 18:53:31 -0500
Hi Mark,

Please be sure to check if you have a CA Server misconfiguration
somewhere.

You can check this with Jeff's casw program.  

If a CA server has for example "EPICS_CA_AUTO_ADDR_LIST=NI", it will
chatter indefinitely on your network.  All CA clients will search like
crazy since they believe someone has joined the party.
Next if the routers are setup to forward broadcasts this will cause
havoc.  Maybe the CA server library should guard against this, somehow?

What level of broadcasts do you see on your network?


Thanks,
Ernest


On Fri, 2004-03-26 at 14:22 -0600, Mark Rivers wrote:
> Dear Andrew,
> 
> This problem is becoming critical.  Every vxWorks/PowerPC IOC at the
> NSLS at Brookhaven is crashing within minutes if it is connected to the
> NSLS network.  The only way the beamlines can run is to disconnect their
> switches from the NSLS network.  Tim Mooney told me yesterday that
> several CATs are now seeing this problem here as well.  It is not known
> if the network activity that is crashing the IOCs is a malicious or not.
> Finding the source of the packets at the NSLS is being worked on, but
> the real solution is to see if there is a fix for the network software
> on vxWorks to make it immune to this problem.  Can you see if Wind River
> has a patch that fixes this?
> 
> Thanks,
> Mark


References:
RE: Buffer problems Mark Rivers

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