Subject: |
RE: "invalid UDP request" during boot |
From: |
"Laznovsky, Michael" <[email protected]> |
To: |
"EPICS Tech Talk" <[email protected]> |
Date: |
Fri, 3 Aug 2007 15:09:25 -0700 |
It appears to work OK after boot. The rack that this h/w is in is
undergoing some changes, so there may have been some cables affected
prior to these msgs appearing. We'll keep an eye on it.
We only see these msgs right after iocInit()... is that a clue?
Mike
-----Original Message-----
From: Jeff Hill [mailto:[email protected]]
Sent: Thursday, August 02, 2007 5:23 PM
To: Laznovsky, Michael; 'EPICS Tech Talk'
Subject: RE: "invalid UDP request" during boot
Hello Mike,
The CA UDP server spits out that message when it receives a datagram with
undecipherable protocol.
If there is substantial multi-bit damage in the datagram it can slip through
the UDP and Ethernet CRC checksum validations. Watch out for vxWorks
auto-negotiation problems with {10/100} and {full duplex/half duplex}
Ethernet that can occur if the vxWorks system is turned on before the switch
is. Also watch out for invalid termination and or branching of legacy coax
based Ethernet. There can also be intermittent issues with copper Ethernet
cables that pass close to electronic noise sources. Look for non-zero error
counts in the output from "ifShow".
Does the CA based communication function correctly after the IOC boots?
Jeff
-----Original Message-----
iocInit: All initialization complete
CAS: invalid (damaged?) UDP request from gtw01:46316 ?
CAS: invalid (damaged?) UDP request from gtw01:39871 ?
CAS: invalid (damaged?) UDP request from gtw01:46316 ?
- Replies:
- RE: "invalid UDP request" during boot Jeff Hill
- References:
- Re: VxWorks time() Ralph Lange
- Re: VxWorks time() Andrew Johnson
- "invalid UDP request" during boot Laznovsky, Michael
- RE: "invalid UDP request" during boot Jeff Hill
- Navigate by Date:
- Prev:
Re: Channel Archiver | Matlab Kay-Uwe Kasemir
- Next:
RE: asyn float64array interrupt problem Mark Rivers
- 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:
RE: "invalid UDP request" during boot Jeff Hill
- Next:
RE: "invalid UDP request" during boot Jeff Hill
- 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
|