Experimental Physics and
Industrial Control System

Mark Rivers wrote:
> 
> Not setting a subnet mask for
> the backplane IP address will result in the default of 0XFFFF0000

<pedantic>
... iff the IP address is in a class B network (like those at the APS
are).  If it's a class C address the default subnet mask is 0xffffff00. 
There aren't many sites with class A IP addresses, but should you be so
privileged you'd get a default of 0xff000000.
</pedantic>

(Just in case anybody accuses Mark of being wrong about the default
because theirs is different).

- Andrew
-- 
The world is such a cheerful place when viewed from upside-down
It makes a rise of every fall, a smile of every frown

References:

RE: Problem talking CA across two CPUs in same crate??? Mark Rivers

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