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Cannot Ping Hyper V guest OS NLB IP from public

Posted on 2009-02-10
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Last Modified: 2012-05-06
Hi Guys...
I'm having some problem with NLB on Server 2008 guest OS in Hyper V.
I have setup 2 Hyper V box, each of them will host Exchange 2007 CAS/Hub Transport.
I managed to bring up my NLB for both guest OS, its able to ping, browse web pages from internal IP/name. but when i triy to access from public internet, it failed. telnet, ping, web access all failed.
I have tested with Single NIC unicast and multicast, followed few suggesstion from few different forums but no help... below is the few links that we refer..

http://www.msexchange.org/articles_tutorials/exchange-server-2007/planning-architecture/load-balancing-exchange-2007-sp1-hub-transport-servers-windows-network-load-balancing-technology-part1.html
http://social.technet.microsoft.com/Forums/en-US/winserverhyperv/thread/dcda9a2c-a0a9-4fb6-86eb-a2e86ea9f745/
http://support.microsoft.com/kb/953828/en-us

Any of you guys encounter before....?
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Question by:hell_angel
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Expert Comment

by:darkjedi213
ID: 23611460
Double check this: on the host OS (that the Hyper-V is sitting on), go to Network and Sharing Center, then Manage Network Connections, check the properties for the physical nic that you are using for the Hyper-V's virtual network. It should only have "Microsoft Virtual Network Switch Protocol" checked. This could be causing the behaviour you are seeing. That nic port functions like a switch port, not a standard nic port (and cannot work when Client for Microsoft Networks, ip 4, ip6, etc are enabled). Also, check that the virtual network connection (same place: N&SC/manage connections) associated with that phyical nic has no options checked. Only within your virtual machines should Client for Microsoft, ip4, etc be enabled. Hope this helps!
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Author Comment

by:hell_angel
ID: 23612254
Hi darkjedi213, thanks for your respone, but it is default that the v switch protocol is enabled on Hyper V nic adapter.... :|
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Expert Comment

by:INV_support
ID: 23622469
You will need to statically add the NLB virtual MAC address to the Hyper-V host or run in multicast mode with a single nic.
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Accepted Solution

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hell_angel earned 0 total points
ID: 23622903
Hi GUys.... Manage to solve the issue by add in static arp at router....
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