Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Tue, 15 Feb 2011 10:08:04 -0600

On Tuesday 15 February 2011 09:52:37 Paul Sichta wrote:
> Look in the CA Reference Manual for your release of EPICS.  I think
> you need to specify EPICS_CAS_INTF_ADDR_LIST .

Actually that variable has no effect on the IOC server, it only applies to the 
CAS which is not (yet) used by the IOC code.

> On Tue, Feb 15, 2011 at 10:33,  <[email protected]> wrote:
> > I now need to take the legacy data from one network and make available on
> > another network via EPICS.  I have a Linux PC with 2 ethernet adapters,
> > eth0 the legacy control system, eth1 the EPICS control system.  The IOC
> > runs on this machine except I cannot see the EPICS PVs via other machines
> > on the eth1 network.
> >
> > I'm guessing that the EPICS IOC is binding to eth0 by default and
> > expecting to serve data to this network?
> >
> > How do I configure EPICS to bind to eth1 rather than to eth0, is this
> > possible?

The IOC server binds to all the interfaces it can see; there's actually no way 
to change that with the current code.  I wonder whether your problem is 
actually that the machines do not have the same subnet mask settings, and 
hence their broadcast addresses are different?  On Unix systems 'ifconfig -a' 
will print the broadcast address; you need to make sure that all systems are 
using the same address.

The output from running 'casr 1' from the IOC shell may also give some hints.

- Andrew
-- 
If a man is offered a fact which goes against his instincts, he will
scrutinize it closely, and unless the evidence is overwhelming, he will
refuse to believe it.  If, on the other hand, he is offered something
which affords a reason for acting in accordance to his instincts, he
will accept it even on the slightest evidence.  -- Bertrand Russell

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System