Experimental Physics and
Industrial Control System

Hi Abdalla,

I assume that not all PCs are on the same subnet. For the ones that have
disconnected PVs (not on the same subnet as the gateway presumably) do they
have the environment variable EPICS_CA_ADDR_LIST set for the client to point
to the gateway server IP prior to client startup?

Sounds like the gateway is working but some clients disconnect while others
are ok. It might also be helpful to run some reports on the gateway and see
what the status of disconnected PVs are to make sure that they are active and
not dead. I assume that they are active and connected because some clients are
still connected.

Marty

On 03/28/2018 07:18 AM, Abdalla  Ahmad wrote:

Hi Paul

The monitoring was ok but they were getting disconnected at some point. And I think something weird happened is that some PCs getting disconnected PVs and some PCs everything works fine.

Best Regards,

Abdalla.

*From:*Paul Sichta [mailto:[email protected]]
*Sent:* Wednesday, March 28, 2018 2:18 PM
*To:* Abdalla Ahmad <[email protected]>
*Cc:* [email protected]
*Subject:* Re: PV gateway renders PVs as disconnected

Abdalla,

I had a similar problem with some CA clients back in 2000  (titled CA Server disconnects) so this is a longshot...

Back then I had a repeatable time-to-disconnect of 2 hours, 11 minutes, and 15 seconds; could it be due to no CA activity from your IOC to the client side of the gateway.  Are all client-monitored values on the affected IOC never changing for long periods?

-ps

On Wed, Mar 28, 2018 at 7:48 AM, Abdalla Ahmad <[email protected] <mailto:[email protected]>> wrote:

    Hi

    We are running the gateway on a virtual server with 1 network interface,
    this server can see all the different LANs (office, machine, beamlines,
    etc.) through routing rules and access lists done by the IT group. When the
    gateway is running, after a while entire IOCs gets disconnected. We are
    running the gateway with no arguments but in the .bashrc file we are
    defining EPICS_CA_ADDR_LIST having the IP address for the gateway to look at
    (Not all IOCs). This behavior happened when having all IOCs or some of them
    in the address list.

    I came upon this video from APS https://www.youtube.com/watch?v=Y5Ge89Y4d1E
    In which, as I understood, they have multiple gateways running on the server
    with each gateway connects one network interfaces together to the other
    interfaces. So my questions are:

    1.What is happening with our setup? Some CA loops happens at some point?

    2.Is having a network interface per VLAN optional or recommended?

    Best Regards,

    Abdalla Ahmad

    Control Engineer

    SESAME

    Allan, Jordan.

    Tel: (+962-5) 3511348 , ext. 265 <tel:+962%205%20351%201348>

    Fax: (+962-5) 3511423 <tel:+962%205%20351%201423>

    Mob: (+962-7)88183296 <tel:+962%207%208818%203296>

    www.sesame.org.jo <http://www.sesame.org.jo/>

References:

PV gateway renders PVs as disconnected Abdalla Ahmad

Re: PV gateway renders PVs as disconnected Paul Sichta

RE: PV gateway renders PVs as disconnected Abdalla Ahmad

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