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Network Load Balancer  - Advice on alternative...

Posted on 2015-01-05
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Last Modified: 2015-02-09
Hi , would like some advice on load balancing.

We use Microsoft Network Load Balancer NLB to load balance a number of websites between two IIS webservers.

We are close to reaching the limit of IP addresses which appears to be 16 per host for non balanced and 16 for the cluster (balanced).

Is there a way around this?....

or do I need alternative load balancing?...


These are two virtual external hosted websevers and so any hardware base load balancing is out of the question.

I was thinking of a possible work around to add another NIC to each webserver and create another cluster pair - that way I can add another 32 clients etc.   - is this possible two have two clusters on the same two webservers ?


Alternatively whats the easiest way to change to an alternative balancing software and whats recommended?

thanks in advanced....
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Question by:Spikeuk30
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by:Dave
ID: 40531274
Do these sites use SSL? Could you use Host Headers rather than IP Address to route to the separate web sites...
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Author Comment

by:Spikeuk30
ID: 40531335
Sorry yes!  the reason we use so many IP addresses is because of SSL, so usually a single IP per client website.
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Dave earned 500 total points
ID: 40531560
Then I think you are pretty much at the limits of NLB, and from what I can see there is no simple way to by-pass the restriction with a "on host" solution.


All the other solutions use an external load balancer to front end the cluster.
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Author Closing Comment

by:Spikeuk30
ID: 40598044
Investigating alternative virtual load balancing appliance to replace NLB.  Thanks!
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