Experimental Physics and
Industrial Control System

Hi Florian,

Have you tried setting your EPICS_CA_ADDR_LIST to the broadcast IP
of the network of interest ... which I assume will not change.

Also, I think that in this situation CA will broadcast to all network
interfaces if you have not specified EPICS_CA_AUTO_ADDR_LIST and
EPICS_CA_ADDR_LIST. So in that case it is possible that you might need
a longer wait time than the default of 1 second for caget, although I
would expect that it should not take longer than that.

Marty

On 01/29/2015 03:35 AM, Florian Feldbauer wrote:

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

References:

Problems with CA Florian Feldbauer

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