Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Thu, 29 Jan 2015 11:58:39 +0000

> Is there a way to specify a subnet as address lsit for CA?

Yes.

setenv EPICS_CA_AUTO_ADDR_LIST NO
setenv EPICS_CA_ADDR_LIST 192.168.1.255

where 192.168.1.255 is the broadcast address of that subnet.  That syntax would be correct if the subnet mask is 255.255.255.0.

Mark

________________________________________
From: [email protected] [[email protected]] on behalf of Florian Feldbauer [[email protected]]
Sent: Thursday, January 29, 2015 3:35 AM
To: EPICS Tech Talk
Subject: Problems with CA

Hey all,

I have observed some problems with channel access in our lab.
We have a PC with three network interfaces.
On is connected to the network of our institute (->WAN)
the other two are used for local sub nets with its own DNS/DHCP...
The used OS on this PC is Fedora 20.

On one of these local sub nets I have a running EPICS IOC.
When using caget on the PC I always get a timeout error.
Only when I specify the environment variables:
     setenv EPICS_CA_AUTO_ADDR_LIST no
     setenv EPICS_CA_ADDR_LIST 192.168.1.6
caget works.

The IP addresses for the local subnet are dynamically assigned,
and I don't want to look up each time, which addresses are used....
Also I don't want to put all 256 possible addresses in the
EPICS_CA_ADDR_LIST.

Is there a way to specify a subnet as address lsit for CA?
Or is it possible to bind all request (from Clients as well as from
Servers) on the machine
to one specific interface?

Best regards,
Florian

--
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| Dr. Florian Feldbauer                |
|                                      |
| Helmholtz-Institut Mainz /           |
| Johannes Gutenberg-Universität Mainz |
| Johann-Joachim-Becher-Weg 36         |
| D-55128 Mainz                        |
|                                      |
| Office: SB1 / 00-213                 |
| Phone:  (+49)6131 / 39-29605         |
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System