FYI, both Xserves have a public (en0) and private (en1) IP address.
I am not using LOM. When I try and configure Server Monitor on my
(10.4.10) MacBook Pro, the Intel Xserves simply never respond to
the client Server Monitor requests, regardless of whether or not I
use the public or private IP address. If I use ARD to connect to
either of the Xserves, they both show the same symptoms: they
cannot monitor themselves (or each other) using either their public
or private IP address. The only way they will monitor themselves is
if I enter the Server Monitor client IP address as being 127.0.0.1.