Re: [EXTERNAL] Re: EPICS CA and PVA across subnets

["Kasemir, Kay via Tech-talk" <tech-talk@aps.anl.gov>]

>  Even when you add the IOC to EPICS_PVA_ADDR_LIST, PVA doesn't seem to use TCP to do name searches.

Just like the EPICS_CA_ADDR_LIST, the EPICS_PVA_ADDR_LIST is used for UDP searches.

For TCP, set EPICS_PVA_NAME_SERVERS (just like EPICS_CA_NAME_SERVERS), typically like this to disable the UDP searches:

EPICS_PVA_AUTO_ADDR_LIST=NO

EPICS_PVA_ADDR_LIST=""

EPICS_PVA_NAME_SERVERS=IP-of-PVA-server

You could list the IP addresses of several IOCs to search them all via TCP, but the list would get long.

The intended use it to list only one TCP address, a name server, so you get a reply from just one TCP connection.