CAS NLB Issue
HI, we have NLB between 2 HUB/ CAS one of the them is virtual.the problem we face is when virtual HUB/CAS restart, the Physical HUB/ CAS not responding until the virtual up and running the the physical come to live after 6 minute.
September 18th, 2012 9:02am

Hi hodhod, Just so I have a better understanding of the issue, is your NLB a hardware NLB (KEMP, F5, etc.)? Also, by not responding, are users not able to access thier email data? ThanksChris Crandall - CB5 Solutions Exchange 2010 MCM - Office 365 MCM - MCT cbfive.com
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September 18th, 2012 9:10am

windows NLB not hardware NLB. the user can't access to email because the outlook ask password.
September 18th, 2012 9:22am

any help Plz
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September 19th, 2012 9:40am

Hi , Please test if you can access CAS via virtual ip or address. If no, please refer to the following article. Unable to connect to Windows Server 2008 NLB Virtual IP Address from hosts in different subnets when NLB is in Multicast Mode: http://blogs.technet.com/b/networking/archive/2009/01/15/unable-to-connect-to-windows-server-2008-nlb-virtual-ip-address-from-hosts-in-different-subnets-when-nlb-is-in-multicast-mode.aspxWendy Liu TechNet Community Support
September 19th, 2012 11:38am

Wendy this is not may case
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September 19th, 2012 12:26pm

when i change NLB from Unicast to Multicast it works fine. but i face new problem i can't open OWA FROM VIRTUAL IP OR FQDN
September 19th, 2012 3:28pm

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