DNS lookups (explained)

For successful failover cluster configuration, Milestone recommends that you test the domain name translation for the cluster members in Windows PowerShell:

• Use forward DNS lookup to obtain an IP address by searching the domain

• Use reverse DNS lookup to obtain the domain name that is related to an IP address

To make sure that the IP addresses and the host names are resolved as expected, you must perform the forward and reverse queries on the primary and the secondary computer:

Query name	Command	Perform on	Expected result
Forward DNS lookup	Resolve-DnsName [secondary computer host name]	Primary computer	The host name of the secondary computer corresponds to the first IP address on the list.
Forward DNS lookup	Resolve-DnsName [primary computer host name]	Secondary computer	The host name of the primary computer corresponds to the first IP address on the list.
Reverse DNS lookup	Resolve-DnsName [secondary computer host name]	Primary computer	The host name of the secondary computer must correspond to the first IP address on the list.
Reverse DNS lookup	Resolve-DnsName [primary computer host name]	Secondary computer	The host name of the primary computer must correspond to the first IP address on the list.