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

Subject: Re: Channel Access problem over SSH
From: Pavel Masloff <pavel.masloff@gmail.com>
To: "Hill, Jeffrey O" <johill@lanl.gov>
Cc: EPICS Tech Talk <tech-talk@aps.anl.gov>
Date: Tue, 17 Apr 2012 17:41:18 +0400
Jeff,


Look. I have noticed that even when I am normally starting an IOC on a linux machine, then I get these messages:
online_notify.c:CA beacon (send to "172.20.255.255:5065") error was "Connection refused"

When I caget from another terminal window, the messages stop appearing. I stop the IOC. Then restart. No problems.
Should I set EPICS_CA_AUTO_BEACON_ADDR_LIST and EPICS_CA_BEACON_ADDR_LIST in linux (bashrc) or in directly in EPICS:

epicsEnvSet("EPICS_CA_AUTO_BEACON_ADDR_LIST","NO")
epicsEnvSet("EPICS_CA_BEACON_ADDR_LIST","localhost")

I think it has something to do with the Repeater (because of the port 5065)?

On Mon, Apr 9, 2012 at 4:59 PM, Hill, Jeffrey O <johill@lanl.gov> wrote:

Hi Pavel,

 

online_notify.c:CA beacon (send to "172.20.255.255:5065") error was "Connection refused"

This probably indicates that the IOC’s IP kernel is unable locate a route to the beacon address 172.20.255.255.

 

To avoid  this type of warning messages, one can modify the CA server beacon destination addresses, independent of the search message destination addresses, using EPICS_CA_AUTO_BEACON_ADDR_LIST and EPICS_CA_BEACON_ADDR_LIST. The server configuration chapter in the CA Reference Manual has some of the details.

 

Jeff

 

From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Pavel Masloff
Sent: Saturday, April 07, 2012 12:19 AM
To: EPICS Tech Talk
Subject: Channel Access problem over SSH

 

Hello tech-talkers,


There is an example IOC on a linux machine (Fedora 16) with an IP-address 172.20.92.99/16:
$EPICS_CA_ADDR_LIST=172.20.92.99
$EPICS_CA_AUTO_ADDR_LIST=NO

Which means I can access PVs on the same machine where the IOC is running. It works. No problem.

Now, when I connect to the linux machine via SSH from another machine on the same subnet (Windows XP, Putty), and when I run the IOC from the SSH client, then I get the following message in epics shell (over Putty) every once in a while:

online_notify.c:CA beacon (send to "172.20.255.255:5065") error was "Connection refused"

Still the IOC is running, I can caget, caput, camonitor. The Firewall is off. What might be the case?


Pavel




--
Best regards,


Pavel Maslov, MS
Controls Engineer at Pulsed power Lab
Efremov Institute for Electro-Physical Apparatus
St. Petersburg, Russia

Mobile: +7 (951) 672 22 19
Phone: +7 (812) 461 01 01




--
Best regards,


Pavel Maslov, MS
Controls Engineer at Pulsed power Lab
Efremov Institute for Electro-Physical Apparatus
St. Petersburg, Russia

Mobile: +7 (951) 672 22 19
Landline: +7 (812) 461 01 01


Replies:
RE: Channel Access problem over SSH michael.abbott
RE: Channel Access problem over SSH Hill, Jeffrey O
References:
Channel Access problem over SSH Pavel Masloff
RE: Channel Access problem over SSH Hill, Jeffrey O

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