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Hyper-v cluster failover RRS feed

  • Question

  • Dear All

    We have microsoft cluster with 5 hyper-v hosts. and SCVMM 2008 r2 sp1...

    In case of network failer no failover action happend and we lose the virtual machines.

    lets say when i unplug the network from one host ,the VMs on that host must failover to the availble other hosts

    Any body advice

    Tuesday, April 24, 2012 6:37 AM

Answers

  • Hello Skoodoo,

    As you have a failover cluster, you would have more than 1 network adapter and if you unplug the one that has been connected to external virtual switch, then cluster will still see that host available but vm's rely on that external adapter will not be accessible from network. You can check the following picture, it has been taken from cluster manager / networks.

    regards


    MCTS, 2008R2 Server Virtualization http://www.erkanaksoy.com

    • Proposed as answer by ErkanAksoy10 Thursday, April 26, 2012 2:35 PM
    • Marked as answer by Vincent Hu Friday, April 27, 2012 5:11 AM
    Tuesday, April 24, 2012 6:58 AM
  • Hi,

    Based on your description, there are three NICs(management .heartbeat and VMs network) on the Hyper-V cluster node. So in Networks hive of your Failover Cluster console, you will be able to see two or three networks. Right click on each of them, just check the box “Allow cluster network communication on this network” on the heartbeat network(check Erkan’s screenshot), leave this box on other networks uncheck. Now disable the heartbeat network on the active node to perform a simulate failure of the network adapter, you will be able to find that the VMs on this node failover to available nodes in the cluster.

    • Marked as answer by Vincent Hu Friday, April 27, 2012 5:11 AM
    Wednesday, April 25, 2012 6:58 AM

All replies

  • Hello Skoodoo,

    As you have a failover cluster, you would have more than 1 network adapter and if you unplug the one that has been connected to external virtual switch, then cluster will still see that host available but vm's rely on that external adapter will not be accessible from network. You can check the following picture, it has been taken from cluster manager / networks.

    regards


    MCTS, 2008R2 Server Virtualization http://www.erkanaksoy.com

    • Proposed as answer by ErkanAksoy10 Thursday, April 26, 2012 2:35 PM
    • Marked as answer by Vincent Hu Friday, April 27, 2012 5:11 AM
    Tuesday, April 24, 2012 6:58 AM
  • Hi,

    In case of network failer no failover action happend and we lose the virtual machines.
    >> In a cluster, there should be several network adapters, which network adapter fails and how it fails?

    By the way, please also provide network settings of all network adapters on the cluster nodes.

    • Edited by Vincent Hu Thursday, April 26, 2012 6:50 AM correct typo
    Tuesday, April 24, 2012 7:06 AM
  • Dear All

    We have microsoft cluster with 5 hyper-v hosts. and SCVMM 2008 r2 sp1...

    In case of network failer no failover action happend and we lose the virtual machines.

    lets say when i unplug the network from one host ,the VMs on that host must failover to the availble other hosts

    Any body advice

    Do you have guest VM failover configured? Or do you have HA enabled for these VMs?

    -nismo

    Tuesday, April 24, 2012 10:19 AM
  • we have three NICs management.heartbeat and VMs network

    yes we have HA enabled for vms

    Tuesday, April 24, 2012 1:15 PM
  • Hi,

    Based on your description, there are three NICs(management .heartbeat and VMs network) on the Hyper-V cluster node. So in Networks hive of your Failover Cluster console, you will be able to see two or three networks. Right click on each of them, just check the box “Allow cluster network communication on this network” on the heartbeat network(check Erkan’s screenshot), leave this box on other networks uncheck. Now disable the heartbeat network on the active node to perform a simulate failure of the network adapter, you will be able to find that the VMs on this node failover to available nodes in the cluster.

    • Marked as answer by Vincent Hu Friday, April 27, 2012 5:11 AM
    Wednesday, April 25, 2012 6:58 AM