Experimental Physics and
Industrial Control System

The server is complaining that it has received an undecipherable UDP message. I would take a close look at what is
occurring on xxxxxx.yyyyyy.lanl.gov.

o Possibly 3rd party software/hardware using UDP port 5064 that isn't CA.

o Possibly hosts that have failed their 10/100 auto negotiation or full/half duplex auto-negotiation, or possibly
some other MAC level packet damage that clobbers so many bits that the CRC checksum sanity tests do not reject the
damaged packet.

> We are using the version of the gateway built against 
> patched EPICS 3.12.

Surely this is built against a patched EPICS R3.13?

PS: A new version of the CA gateway compatible with EPICS R3.14 and with many bug fixes will be available soon, but
I doubt that this will resolve the specific problem you are seeing.

I can drop by and take a look if you would like.

Jeff

> -----Original Message-----
> From: Gary P Carr [mailto:[email protected]]
> Sent: Monday, August 25, 2003 3:09 PM
> To: [email protected]
> Cc: [email protected]
> Subject: Channel Access Errors
> 
> We've been getting these errors on our Channel Access Proxy Gateway for
> the
> last couple of days. We are using the version of the gateway built
> against
> patched EPICS 3.12. Use the gateway to provide access to the controls
> subnet from outside the control system. Only see these errors for two
> outside hosts. Other channel access through the gateway seems to work
> fine.
> I finally blocked access for the two hosts at our firewall. Had more
> than a
> Gig of log messages just like the following:
> 
> CAS: bad message type=11
> CAS ? on ? at xxxxxx.yyyyyy.lanl.gov:5064: cmd=11 cid=4294967295 typ=0
> cnt=0 psz=40 avail=8e
> Internal failure - unexpected error processing stateless protocol
> 
> Can't find a match to any of the strings in the errors in the gateway
> code
> itself. Anyone have an idea about what they mean?

Replies:

Re: Channel Access Errors Brian McAllister

References:

Channel Access Errors Gary P Carr

Navigate by Date:

Prev: Channel Access Errors Gary P Carr

Next: Does DISP work for DB OUT links? Benjamin Franksen

Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  <2003>  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 

Navigate by Thread:

Prev: Channel Access Errors Gary P Carr

Next: Re: Channel Access Errors Brian McAllister

Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  <2003>  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024