Channel Access and Virtual IPs

["Ernest L. Williams Jr." <ernesto@slac.stanford.edu>]

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" <hmchoi@kaeri.re.kr 
<mailto:hmchoi%40kaeri.re.kr>>
/Subject/:     *Re: I have a question about using muti IOC*
/From/:     Ralph Lange <Ralph.Lange@bessy.de 
<mailto:Ralph.Lange%40bessy.de>>
/Date/:     Thu, 04 Jan 2007 11:56:40 +0100
/Cc/:     EPICS Tech Talk <tech-talk@aps.anl.gov 
<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.