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 HALP! Questions on Windows and Windows Server
 Windows Server 2008 R2
 NLB Setup - Unicast Mode on VM		  New Topic  Reply to Topic
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MadCow
Honorable But Hopeless Addict

Canada
1834 Posts
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Posted - 03/05/2012 :  10:26:10 AM  Show Profile  Reply with Quote
Windows 2008R2 both nodes running in VMs.

Trying to setup NLB between these 2 servers. Using Unicast.

I added the NLB feature and through the NLB Manager I add the Node A and when I try to add/connect to Node B ..It cannot find it. I cannot even ping it which I guess is normal because of unicast mode. I have a cross over cable on the second NIC of each server between both the nodes.

And if I turn both nodes to Multicast then I can add the nodes to the NLB Manager Console but then I am not able to access the Virtual IP from the LAN and the website does not come up. I cannot even ping the VIP from LAN.

I would like to have Unicast setup and able to add the nodes via the NLB Manager. I have no issue setting this up on Windows 2003. This is my first NLB on Windows 2008R2.

Advise Please.

Thank you.

Sunny
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"Everyone is susceptible to the notion that when you begin to do well, you begin to see no boundary lines and forget the rules apply" - Eliot Spitzer
Edited by - MadCow on 03/07/2012 10:50:14 AM

MadCow
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Canada
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Posted - 03/05/2012 :  10:54:53 AM  Show Profile  Reply with Quote

May be its an issue with VSpehere we running???

Sunny
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"Everyone is susceptible to the notion that when you begin to do well, you begin to see no boundary lines and forget the rules apply" - Eliot Spitzer
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Rambler
Major Contributor

Czech Republic
949 Posts
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Posted - 03/05/2012 :  2:27:58 PM  Show Profile  Reply with Quote
Does this help? http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1556
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MadCow
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Canada
1834 Posts
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Posted - 03/07/2012 :  10:49:34 AM  Show Profile  Reply with Quote
Thanks for the link. I was reading through it and came across ...

If you want to use NLB Unicast mode, ensure that:
All members of the NLB cluster must be running on the same ESX host.

If all the nodes are on the same ESX Host and the host goes down for some reason ... it takes all the nodes down ... doesnt this defeat the purpose of having an NLB?

Sunny
__________________________________________________________________________


"Everyone is susceptible to the notion that when you begin to do well, you begin to see no boundary lines and forget the rules apply" - Eliot Spitzer
Edited by - MadCow on 03/07/2012 10:50:53 AM
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aval
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USA
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Posted - 03/07/2012 :  7:20:30 PM  Show Profile  Reply with Quote
Right. That's what I would say: all both guests on same host: SPoF
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Rambler
Major Contributor

Czech Republic
949 Posts
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Posted - 03/08/2012 :  1:48:59 PM  Show Profile  Reply with Quote
This is probably not helpful at all, but getting NLB to work on H-V (with each VM on different host) is apparently less problematic - just need to enable MAC spoofing.
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joe_elway
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Ireland
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Posted - 03/08/2012 :  5:02:11 PM  Show Profile  Visit joe_elway's Homepage  Reply with Quote
Was about to mention MAC spoofing :)
Aidan Finn
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