Re: Problems with CA

["Martin L. Smith" <mls@aps.anl.gov>]

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