Re: Does Microsoft DNS support GSLB?

Hi Kevin, thanks for the reply.

I have been told by the infrastructure team (I am a developer) that
subnet proximity of the client and host is not a reliable indicator of
physical proximity. Prior usages of this assumption resulted in clients
in certain branch offices being redirected to a completely different
office, not to their "local" server. They admit the network was not
planned out well at the start, now they are living with it.

Hence for other requirements like this, they have begun to use and
maintain a Sites & Services based list of subnets at each Site, and
have encouraged me to design my solution around Sites & Services, since
this is their reliable and always maintained "lookup table" of which
client IP subnet ranges are found in which physical locations. They
suggest I then add my web site as a custom defined Service (e.g.
_intranet._tcp) in each Site. The idea would be that a logical scan of
all subnets in the Sites list would identify which Site the client is
at, and then the client should be directed to the host defined as
hosting the _intranet._tcp service at that site.

So is there any way for DNS to leverage the correct "physical
proximity" knowledge embedded in AD Sites & Services? I could write a
custom ISAPI filter that runs on all web servers that redirects clients
to the right host, but then they are jumping across the WAN just to be
redirected back to a local host. I would prefer to avoid this penalty
if possible, which is why I am looking to DNS...

RBL

.

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