Hi, we have a scenario, we have migrated from Lotus Notes 8.5 to Exchange 2010.
We have configured Exchange 2010 NLB with Multicast, and since the time we are facing a problem that we are facing ping loss on the NLB IP. But don’t have a ping loss on Individual server IP.
The bandwidth to the datacenter is 16 MB. We have 1200 users in different environment on different subnets.
What do you suggest, can we configure the Unicast on the NLB ? Or is there any other work around to this one ?
Check for the NLB port 2504(UDP) at your place whether it is disabled? If so enable it.
I suggest you check for event ID which is recorded for this issue and check cluster logs for more information.Please check below articles once:
Regards, Ravikumar P
- Upravený Ravikumar Pulagouni 28. května 2012 14:47
Thanks for posting in Windows server forum.
You may check the following thread discuss about the WNLB with Exchange CAS array.
CAS Array Network Load Balancing Issues causing Outlook Login Pop-Ups
Exchange 2010 SP1 CAS Array - Hyper-V NLB in Unicast Mode
TechNet Community Support
sorry for the late response as i was transferred to another assignment.
i have gone through these articles but they are not helpful, as in my scenario we have Physical servers in place. we have configured Multicast NLB for CAS Array.
we have configured the Virtual MAC at the switch directly connected to the CAS NLB. still we have the issue with it, the performance at the NLB IP is really slow at average of 2 Kb to 4 Kb, if i test with rest of the individual 4 network cards the performance is fine and emails with attachments are frequent in send and receive, but as we switch to NLB IP we get 2 Kb to 4 Kb bandwidth.
any help regarding this will be appreciated, as i have been forced to resolve the issue by today.
Cisco Certified Network Associate
Cisco Certified Internetwork professional - MPLS
Certified Information Systems Security Professional
Microsoft Partner Network 2011
Microsoft Certified Professional
Microsoft Certified Systems Administrator:Security
Microsoft Certified Systems Engineer: Security
Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration
Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration
Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration
Microsoft Certified Technology Specialist: Windows 7, Configuring
Microsoft Certified IT Professional: Enterprise Administrator
Microsoft Certified IT Professional: Server Administrator
Certified Ethical Hacker
Computer Hacking Forensics Investigator
Certified Sonicwall Security Administrator