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

Subject: TCP and UDP port numbers fr multiple IOCs
From: Hovanes Egiyan <[email protected]>
To: "[email protected]" <[email protected]>
Date: Wed, 21 May 2014 15:34:16 -0400
Hi,

we are running multiple soft IOC-s on the same Linux host.
Right now each IOC is assigned a TCP port automatically since we do not set
the EPICS_CA_SERVER_PORT and EPICS_CAS_SERVER_PORT variables.
All these IOC-s are listening to UDP port 5064 and now we setup CA clients to
look for CA channels using 5064 port and the the network broadcast address.
Another option, according to the manual, is to manually set the server port #
using EPICS_CAS_SERVER_PORT variable, but that also seems change the
UDP port # for the name resolution for that IOC, which means that the clients will need to be setup to use UDP port # different from default. Looking at the CA manual at

http://www.aps.anl.gov/epics/base/R3-14/8-docs/CAref.html

I did not find a way to set the TCP port manually using EPICS_CAS_SERVER_PORT or EPICS_CA_SERVER_PORT but keeping the UDP port number at 5064, similar to what happens
when the  TCP address is assigned automatically. But before giving up on
that idea, I would like to get confirmation from EPICS experts that I did not miss it and such
flexibility does not exist now.

We are using R3-14-12-3 EPICS base.

Thanks in advance,
    Hovanes Egiyan


Replies:
Re: TCP and UDP port numbers fr multiple IOCs Andrew Johnson

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