Re: Web Services DNS Round Robin

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You are looking at the network from the side of the servers, not the side of
the clients.

When you put in a NLB, you make one IP address visible. It is a Virtual IP.
The caller (in this case, your ASP site) cannot tell that there are three
machines under the covers. That machine (or farm?) need to use the DNS
entry assigned to the Virtual IP, not the contained IP addresses.

This is a bit confusing when you have all of the machines on a single LAN.
If it makes it less confusing, you can always configure a VLAN on your
switch to seperate the traffic from the ASP web server to your NLB, and keep
that apart from the traffic that flows from the NLB to your web application
servers.

--
--- Nick Malik [Microsoft]
MCSD, CFPS, Certified Scrummaster
http://blogs.msdn.com/nickmalik

Disclaimer: Opinions expressed in this forum are my own, and not
representative of my employer.
I do not answer questions on behalf of my employer. I'm just a
programmer helping programmers.
--
"JP" <JpMaxMan@xxxxxxxxx> wrote in message
news:uAI5FSaTFHA.1152@xxxxxxxxxxxxxxxxxxxxxxx
> Greetings - I have a classic ASP site that is accessing custom written
> .NET web services - we are looking at scalability options and though we
> have an F5 load balancer that would definitley do the trick, I was
> wondering how DNS load balancing was handled in such a situation?
>
> That is DNS Resolves:
>
> mywebservice.mydomain.com: 10.10.10.10, 10.10.10.11, 10.10.10.12
>
> I knwo most browsers will succesfully load balance this scenario, but it
> is up to the 'client' making the request.
>
> Any info would be appreciated.
>
> Thanks!
>


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