Re: EPICS_CA_ADDR_LIST question

["Kasemir, Kay" <kasemirk@ornl.gov>]

Hi:

You configured the client side OK, using EPICS_CA_ADDR_LIST = broadcast

The server side, i.e. every IOC except the very first one, will issue that warning.
It's OK, there's no way to disable that warning. It just tells you that your clients will need to use the broadcast address - which you did.
So ignore the warning.

-Kay


On Feb 23, 2015, at 1:15 PM, Mazanec Tomáš <Tomas.Mazanec@eli-beams.eu>
 wrote:

> 
> Hi
> 
> I think the fix is here:
> https://wiki-ext.aps.anl.gov/epics/index.php/How_to_Make_Channel_Access_Reach_Multiple_Soft_IOCs_on_a_Linux_Host
> 
> The problem, you've described, refers to a general behaviour of Linux UDP stack. 
> If UDP broadcast is used (like with CA configured by EPICS_CA_ADDR_LIST), only the first client (IOC) is served by OS.
> 
> Cheers,
> Tomas
> 
> ________________________________________
> Od: tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] za uživatele Chen Xue [xue@bio.aps.anl.gov]
> Odesláno: 23. února 2015 18:41
> Komu: tech-talk@aps.anl.gov
> Předmět: EPICS_CA_ADDR_LIST question
> 
> Hi, there,
> 
> I have multiple IOCs in a same host. I set up my EPICS_CA_ADDR_LIST to its
> broadcast address of IOC host as "1.2.3.255" instead of its IP address
> "1.2.3.4" or localhost. But when I started IOC, I still got the warning as
> below.
> 
> cas warning: Configured TCP port was unavailable.
> cas warning: Using dynamically assigned TCP port xxx,
> cas warning: but now two or more servers share the same UDP port.
> cas warning: Depending on your IP kernel this server may not be
> cas warning: reachable with UDP unicast (a host's IP in EPICS_CA_ADDR_LIST)
> iocRun: All initialization complete
> 
> BTW, my IOC host and client are in the same subnet.
> 
> How should I fix it?
> 
> Thanks,
> 
> Chen
>