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<== Date ==> <== Thread ==>

Subject: Re: PV gateway renders PVs as disconnected
From: Ralph Lange <[email protected]>
To: EPICS Tech Talk <[email protected]>
Date: Wed, 28 Mar 2018 16:29:09 +0200
Hi Abdalla,

How is your network context/setup?
From your mail we know that there are multiple networks. You write that your virtualized Gateway host only has one network interface. Is that one (virtual) "physical" interface, or one logical interface? In other words: does that Gateway machine have a VLAN setup?
How are data producers (IOCs) and data consumers (clients) distributed over the different LANs you mention?

Let me say that in such a multi-network setup it is very unlikely that a Gateway works without configuration.
Also, unless there is a clear separation between networks with producers and networks with consumers (without overlap), you are likely to need more than one Gateway instance.

Have you read the "Gateway Configurations" chapter in the Gateway User Guide on https://epics.anl.gov/extensions/gateway/index.php?

Cheers,
~Ralph


On Wed, Mar 28, 2018 at 2:33 PM, Abdalla Ahmad <[email protected]> wrote:

Hi Ralph

 

No options, just the EPICS_CA_ADDR_LIST.

 

Abdalla.

 

From: [email protected] [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Ralph Lange
Sent: Wednesday, March 28, 2018 1:55 PM
To: EPICS Tech Talk <[email protected]>
Subject: Re: PV gateway renders PVs as disconnected

 

Hi Abdalla,

 

How is that CA Gateway configured?

(Even when started without command line arguments, a Gateway usually needs configuration.)

 

~Ralph

 

On Wed, Mar 28, 2018 at 1:48 PM, Abdalla Ahmad <[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

Fax: (+962-5) 3511423

Mob: (+962-7)88183296

www.sesame.org.jo

 

 



Replies:
RE: PV gateway renders PVs as disconnected Abdalla Ahmad
References:
PV gateway renders PVs as disconnected Abdalla Ahmad
Re: PV gateway renders PVs as disconnected Ralph Lange
RE: PV gateway renders PVs as disconnected Abdalla Ahmad

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