On Nov 18, 2005, at 05:42, Jamie Pratt wrote:
I have an environment with 4 MS Active Directory DNS servers
running DHCP. The dhcp servers are "load-balanced" in two pairs,
via a cabletron smart-switch router upstream which hands off two
offers per dhcp request...
So.. Herein lies my problem. Since the AD servers do not actually
hand off the addresses (the switch does), the checks on the ad
system IP's fail, even though two offers are recieved, it fails....
[...details of the failuer...]
Obviously, if i monitor the 10.2.1.1 address with check_dhcp, it
works fine, but defeats the purpose since the ssr router/switch is
the parent of most of these devices, MS AD systems included... :-(
So.. Any future option for specifying the oferring server, and the
actual requested server, or any workarounds available here? I dug
around extensively for a "workaround" or something but have found
nothing.. any ideas/thoughts appreciated...
For load-balanced services, I normally monitor the service on each
host in the pool individually, with the results of those monitors
monitored by the special "cluster monitor"; however, you have
hardware interfering with that, so you can't do it. Unless you can
somehow program the SSR to return the DHCP replies with the source
addresses of the AD servers, you'll just have to monitor it as if it
were a single DHCP server.
-Guy
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