Re: CA for IOCs w/ dual NICs

[Andrew Johnson <anj@aps.anl.gov>]

Kate Feng wrote:
> There are two network interfaces (N.I.) on my IOC, each attached
> to  a  different  IP address. I  thought one could  decide which medm
> clients  "Channel Accessing"  which  N.I. by opening two windows.
> Both windows  are set with  EPICS_CA_AUTO_ADDR_LIST = NO.
> Window #1 is set with EPICS_CA_ADDR_LIST= IP1, while
> window #2  is set with  EPICS_CA_ADDR_LIST= IP2.
>
> Is ther any other better way ?   I wanted to make sure  that certain
> clients  CA the specified IP, instead of  the other one.  Thus, I
> disconnected
> one of the cable going to that specified N.I.  However, when I do that,
> all the medm clients on both windows  became disconnected from the IOC.

The two IP addresses must be on different subnets, or the IOC OS's 
network code is likely to just use one port for all communications to 
that subnet - display the routing table from the IOC's OS and you may 
get a clue what it's doing at the moment.  Once you've separated the two 
ports properly into different subnets, your technique of setting 
EPICS_CA_ADDR_LIST should work as you expect.

- Andrew
--
Podiabombastic: The tendency to shoot oneself in the foot.