Re: Load Balancing the Proxy via Round Robin DNS
- From: "Quillman Shawn (RBNA/CIT7)" <Shawn.Quillman@xxxxxxxxxxxx>
- To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
- Date: Wed, 25 Sep 2002 13:47:08 -0500
If you feel like being manual about things you can use a PAC file. In a PAC
file you specify rules and give an ordered list of proxies to try based on
the rules. The browser will try the first server in the list first then, if
it can't be reached, the second and so on. You can include a randomizer in
the PAC source that will return a different order of proxies for each
request, for each browsing session, etc. Just depends on how creative you
want to get with your javascript.
It's not perfect load balancing but it's working well for me. I have to
ISA's that can't be in the same AD site, therefore can't be in one array.
I'm not sure if they can be balanced with MLB / NLB since I've never looked
into them. Most NLB solutions I've seen require machines to be on the same
segment which my two servers definitely are not. I support 15 or so
locations around the US with 2 ISA's and a PAC file. Works great.
-Shawn
-----
Shawn R. Quillman
Robert Bosch Corporation RBNA/CIT7
38000 Hills Tech Drive
Farmington Hills, MI 48331
(248) 553-1164 (P) (248) 848-2855 (F)
shawn.quillman@xxxxxxxxxxxx
-----Original Message-----
From: Paul Berg [mailto:frogman1370@xxxxxxxxx]
Sent: Wednesday, September 25, 2002 2:27 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: Load Balancing the Proxy via Round Robin DNS
http://www.ISAserver.org
Greg,
I'm not sure about this <Everyone correct me if I'm wrong>. But if you
set the ISA servers as round robin, the traffic will still be sent to the
server regardless if it is down or not. What you want to implement is the
Microsoft Load Balancing which will discover if the server has been
disconnected from the network or not.
Greg Wright wrote:
http://www.ISAserver.org
Hi everyone,
Anyone played around with Round Robin DNS configurations for load
balancing?
Specifically, what sort of issue's (if any) exist when one of the
servers is offline?
Cheers,
Greg
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