Re: Identical Process Variable names on Multiple Servers

[Ralph Lange via Tech-talk <tech-talk at aps.anl.gov>]

On Thu, 18 Feb 2021 at 16:14, Michael Davidsaver <mdavidsaver at gmail.com> wrote:

On 2/18/21 7:01 AM, Ralph Lange via Tech-talk wrote:
> When using an explicit IP for the name search, only the /last/ IOC started on that machine will answer.

FYI. first vs last depends on host OS, and as I recall windows and linux differ.

Hm! I was not aware of that at all. Will verify and update the README.

 

2. mis-configured broadcast address

Both the .1 and .2 host must have the same broadcast address set.

As .1 and .2 are different networks, it actually depends on the structure.

Always: The broadcast addresses must match between the IOC host (receiving the broadcast) network configuration and the client (sending the broadcast) ADDR_LIST setting.

If the client host has a network interface into the IOC host network: The client host network configuration on that interface must also match.

If there is a switch between the two networks: The switch needs to be configured to forward "directed broadcasts".

Cheers,
~Ralph