Hi all
We had a huge outage recently, whereby the cisco DTP feature was turned off on a core switch. Our 2012 (R2 and non-R2) hyper-v clusters fell over. they are HP blades across two chassis with FC storage access to the SAN.
When the DTP was turned off, this seemed to have caused the chassis on-board HP switches to 'down' all the NICs on the blades and thus isolating all the hosts. This resulted in many VMs being brought offline.
As the storage is via FC, surely 2012 Hyper-V can uses this to see if
1) the VM is still running on another node, and
2) use it as a heartbeat. Especially for the quorum drive.
our VMware cluster carried on plodding along merrily.
Does anyone know what could of happened here, is this normal Hyper-v response to network isolation? can it be tweaked? or if anyone has had similar issues with NICs going down on a HP chassis switch
Appreciate any links as well to docs, am struggling to find some deeper good hyper-v/failover clustering material.
thanks in advance.