Cannot Ping Hyper V guest OS NLB IP from public

Posted on 2009-02-10
Medium Priority
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..


Any of you guys encounter before....?
Question by:hell_angel
  • 2

Expert Comment

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!

Author Comment

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

Expert Comment

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.

Accepted Solution

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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