iis load balancer

i'm desperately looking for a good IIS load balancer.  We had a Baracuda 340 that we had to replace with a 640 due to capacity issues.  Now the 640 is causing problems.  What load balancers do you recommend and why?  Thanks!
menreeqAsked:
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menreeqConnect With a Mentor Author Commented:
Thanks guys.  The problem ended up being the Barracuda 640 load balancers.  For some reason they sporatically lost connectivity to the web servers about twice a day.  After hours and hours of troubleshooting we replaced the barracudas with CoyotePoint 450's and haven't had any issues in over 2 days now.
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vinsvinCommented:
Radware is one of the load balancer I use and looks good. See the link below

http://www.radware.com/Products/ApplicationDelivery/AppDirector/default.aspx
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vinsvinCommented:
also go through the below link. It may help you

http://loadbalancer.org/
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jan-janssenCommented:
If you reach the bottleneck of you current load balancer this might be cause by an backend issue rather than a front end one. Therefore I recommend having a look at multilevel clustering so have a load balancer for your database and iis server all on software level, in addition to the current hardware load balancer.
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RovastarCommented:
I agree with jan-janssen, you seem to be looking the wrong areas here.

But to get a better understand how big is your web farm? (how many servers do you have)

How much traffic is causing you concern? (say in a 1 minute period)

What sort of processing is the site doing? CPU load, heavy disc usage, etc

However I disagree with the infrastructure setup recommendation here.

Multiple tiers are the way to go. IIS front end farm on teh front end tier and cluster DB on teh db tier.

If you have multiple application then you can look at an applciation tier too.

PersonallY I like the F5 BigIP kit
http://www.f5.com/products/big-ip/local-traffic-manager.html
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menreeqAuthor Commented:
My own solution
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