DNS name caching speeds up the process whereby the DNS name resolver converts host names into IP addresses. The DNS name cache stores DNS requests so they can be easily and quickly found when needed. Name caching improves DNS performance during a name server failover and reduces the time needed for active/active configuration takeover and giveback. DNS name caching is enabled by default.
You can disable DNS name caching by using the dns.cache.enable option, but doing so might have an adverse performance impact. The dns flush command removes all entries from the DNS cache. However, the command has no effect if DNS caching is not enabled. For more information about the dns flush command and the dns.cache.enable option, see the na_ dns(1) man page.