Experimental Physics and
Industrial Control System

"Smith, Martin via Tech-talk" <[email protected]> · Tue, 26 Feb 2019 13:01:48 +0000

Hi Phil,

I think that your question is a bit different than what I do; but I use the PV
nameserver with the PV gateway mainly to limit CA broadcasts into the control
network. Our PV gateways/ Nameservers run on hosts with multiple network
interfaces. This is how I make them work together.

PV Nameserver Setup:
EPICS_CAS_SERVER_PORT=5062
EPICS_CAS_BEACON_ADDR_LIST="127.0.0.1"
EPICS_CAS_BEACON_AUTO_ADDR_LIST="NO"

EPICS_CA_ADDR_LIST="xxx.xx.xx.255" - Control network broadcast IP
EPICS_CA_AUTO_ADDR_LIST="NO"
=============================================================
PV Gateway Setup:
SIP="IP_PV_Gateway:5064" - IP address clients use to connect to PVs
CIP="127.0.0.1:5062"

So, the CA clients request goes to the PV gateway (server side) while the client
side of the gateway sends a CA search request to the PV Nameserver. The PV
Nameserver has a list of known PVs that it uses to see if the PV exists and who
has the PV being requested. If the PV does not exist in the Nameserver then the
gateway does not connect and does not send search requests to the IOC side.
Note that the PV gateway and Nameserver talk to each other on port 5062 in this
example.

Marty

On 2/25/19 9:47 AM, Phillip A. Sorensen via Tech-talk wrote:
> Good Morning,
> 
> I am setting up an EPICS CA gateway between to networks, but I would
> like the gateway to only respond to direct name searches and not to
> broadcast name searches.  Is this even possible with the current gateway
> or CA protocol?
> 
> I tried setting the -signore to the broadcast address but that did not work.
> 
> Phil Sorensen
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System