Hi all,
I had a very strange situation in my Hyper-V 2 nodes-cluster:
I have one networtk for HertBeat only (10.0.0.0/24) and second for HyperV internal networking for virtual machines (In properties marked "Do not allow clustern network communication")
Machines were working properly and any migration too.
One day, my secon done HyperV2 was marked red in Failover Cluster Manager mmc. I discovered that HyperV LAN is unavailable on this second node. BUT everything war working properly - HyperV2 node was on internet, communicated to AD domain, even culd run any virtual machine...
Several times I checked the configuration, also check TMG configuratio, I was wondering if it can not be wrong settings on network access rule, I tried to restart this host - no result, ... network was still unavailable.
After about a hour I found the resolutuion:
On my second Hyper-V node Disable / Enable Local Area Connection network adapter, connected to Hyper-V LAN in Network Connections control panel!
Hope this will help to somebody ;)
Marian, just trying to help you