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slambert01

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Exchange 2010 CAS Array with NLB

I have set up 2 CAS / Hub Transport server and configured NLB and the CAS Array. i can connect to the owa site from each server but not from anywhere else. I have a DNS record for the cas array name pointing to the virtual IP of the NLB. if i try to connect just using the Virtual IP of the NLB i can not connect to the owa page either, i have test the load balancing and it is working, i just think i am missing somthing with my cas configurationl.
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Rajkumar Duraisamy
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Do you have A Record in DNS with the name MAIL (mail.domainname.com) and assigned the ip address of  NLB ?

Is that mail.domainname.com mentioned on the OWA url?

can you explain the CAS array setting little more..
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slambert01

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yes my A record is mail.domain.com. where do you mean in the OWA url? ass for the cas array i created it by using the new-clientaccessarray -fdqn "mail.domain.com" cmdlet
Sever configuration -> Client Access Server -> Select the server and bottom you will see OWA tab, go to the properties of OWA and you have to enter the internal url.

If you are going to have the same url for external , you can use the same url for external also

inform if any issue.
yes i do have the mail.domain.com as the internal and external on the owa. i wasnt sure if that is what you ment or you ment something in IIS.
Why error do you get when you try to connect to OWA cluster IP?
webpage can not be displayed.
404, 500, or something else?
using firefox i get "the Connection was rest" the connection to the server was reset while the page was loading.
help me to know the below details. run the below command from command prompt

Ping -a mail.domain.com

Is that ip address of ping result showing the IP of NLB virtual IP?
you are trying to access owa using https://mail.domain.com/owa from internal or external network ? and getting the page cannot be display.
yes that is exactly what is happening.
I think i narrowed it down, if i shut down one or the other CAS server i can get to the OWA site, just not with them both up at the same time.
What are you using to load balance them?  Exchange/Windows or Exchange/Hardware appliance?
windows network loadbalacing
And to further clarify, you have not joined the two servers together as a cluster?
no cluster just the nlb
yes that is the exact document i used to set it up.
can you explain the exchange infrastructure in detail?

are you having all the default servers roles installed on those two servers?

If yes, do you configure dag on the same server?

If yes, then it will be a best practise to use a hardware load balancer.

I got this information from here - http://www.msexchange.org/articles_tutorials/exchange-server-2010/high-availability-recovery/load-balancing-exchange-2010-client-access-servers-using-hardware-load-balancer-solution-part1.html
the exchange enviroment is 2 load balanced CAS/HT server and 1 Mailbox server, they are running in a VM enviorment. I have read alot of articles saying that hardware load balancer would be best practice or using microsoft TMG as a load balancer, which is what i am starting to lean toward after troubleshooting this for over a week now.
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tigermatt
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