reverse lookup for the Microsoft Failover Cluster virtual NIC's IP address

[andrew_greig]

We have our (A)SCS components installed in a Windows 2012 Failover Cluster setup.

We are seeing some of the symptoms described in note "2224846 - Long failover times of (A)SCS in Failover Cluster" ( http://service.sap.com/sap/support/notes/2224846 ), whereby the reverse lookup for all the IP addresses associated with the Failover Cluster host is taking several seconds and therefore delaying the start of the message server when a fail-over occurs.

The last point in the note says :

Recommendation:
Add IPs for virtual Failover cluster NICs to \etc\hosts like this:       169.254.1.42  virtcluster1

but as far as I can find out the address for the Microsoft Failover Cluster Virtual Adapter is dynamically assigned from the APIPA range 169.254.0.1 to 169.254.255.254, so it's not possible to know what addresses to put in the hosts file, unless someone has found a way of assigning a static address to the Failover Cluster Virtual Adapter ?

Or maybe the lookup for this particular address can be disabled in some way ?

Thanks.

[Former Member]

please check

http://service.sap.com/sap/support/notes/1365796

to find out whether your name resolution on the cluster nodes is configured properly.

The 169.... ip addresses are only used for communication of the cluster itself.

The problem is, that you can't change this virtual adapter's order in the adapter list.

If you are lucky, it is not listed as first adapter. If you are not lucky, then it is used as first adapter and you can't change it in the order of the adapters list (because it is not listed there).

Above note does change the IPV4 hostname resolution.

Please consider also to deactivate NETBIOS over TCPIP. This feature does dramatical increase hostname resolution if your DNS is not correctly configured.

best regards

Peter