Hyper-V 2012 ADMIN$ share on Cluster IP address

Hi,

We have a new 2012 cluster with 2 nodes. We're trying to get a backup solution (Asigra) working to back up the cluster but it requires that the ADMIN$ share on the cluster IP address is reachable across the network - which it is not. The ADMIN$ share on each physical node is reachable.

So for example -

cluster IP = 10.0.0.1 - ADMIN$ not reachable
node 1 = 10.0.0.2 - ADMIN$ reachable
node 2 = 10.0.0.3 - ADMIN$ reachable

We have a 2008 cluster with 3 nodes, where the ADMIN$ share is reachable (I can map to it fine in Windows Explorer) - but someone else set this up and they've since left the organisation.

Anyone able to suggest how we might get this working please?

thanks, Will