Experimental Physics and
Industrial Control System

"Ernest L. Williams Jr." <[email protected]> · Thu, 23 Sep 2010 08:14:51 -0700

Hi,

Does CA fully support virtual IPs on a linux host?
Or are we still waiting on the merge fo rsrv and pcas?

References an old tech-talk message:
Message from Tech-talk

/To/: "Hyun Mi, Choi" <[email protected]

<mailto:hmchoi%40kaeri.re.kr>>

/Subject/:     *Re: I have a question about using muti IOC*

/From/: Ralph Lange <[email protected]

<mailto:Ralph.Lange%40bessy.de>>

/Date/:     Thu, 04 Jan 2007 11:56:40 +0100

/Cc/: EPICS Tech Talk <[email protected]

<mailto:tech-talk%40aps.anl.gov>>

/In-reply-to/:     <000601c72fb8$a66010b0$a4302b93@LocalHost>
/Organization/:     BESSY
/References/:     <000601c72fb8$a66010b0$a4302b93@LocalHost>

Hello Choi,

the most straightforward and cleanest way to achieve this:

Configure multiple additional (logical) network interfaces with

different IP addresses that use the same (physical) ethernet card on

your Linux box.

Start each soft IOC pointing its Channel Access Server to a different of

the additional network interfaces, using the environment variables

described in the CA Reference Manual.

That way your multi IOC Linux host really looks like a bunch of separate

IOCs with separate IP addresses. No confusion or problems with shared

ports should occur. Also - seen from the CA client side - you always

know which of the soft IOCs you are connected to, as you can distinguish

them by IP numbers.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System