DNS agent
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DNS agent

The DNS agent updates and monitors the mapping for the following:

• The host name to IP address (A, AAAA, or PTR record)
• The canonical name (CNAME)

The agent performs these tasks for a DNS zone when failing over nodes across subnets (a wide-area failover). Resource records (RR) can include different types: A, AAAA, CNAME, name server, SOA, and PTR records.

Use the DNS agent when the failover source and target nodes are on different subnets. The agent updates the name server and allows clients to connect to the failed over instance of the application service.

For important information about this agent, refer to:

DNS agent notes