DNS information you can view

You can view information about whether DNS and DNS caching are enabled, configured name servers, state of these name servers (whether up or down), configured DNS domain name, DNS cache statistics, and performance statistics for each name server.

The dns info command displays the status of the DNS resolver. If DNS is enabled, the command displays the following information:

• Whether DNS is enabled
• Whether DNS caching is enabled
• Caching statistics
  • Cache hits: Number of DNS requests that were found in the cache
  • Cache misses: Number of DNS requests that were not found in the cache and that required a DNS query to the name server
  • Cache entries: Number of entries currently in the DNS cache
  • Expired cache entries
  • Number of cache replacements
• Details about each name server that was polled by your storage system:
  • IP address of the DNS server
  • State of the name server, displayed as "UP," "DOWN," or "NO INFO"
  • Date of the last DNS request to that name server
  • Average time in milliseconds for a DNS query
  • Number of DNS queries made
  • Number of DNS queries that resulted in errors
• Default DNS domain name of the storage system
• Search domains of the storage system

The search domains are domain suffixes that are used to convert unqualified domain names into fully qualified domain names (FQDN). The search domains are read from the search directive in /etc/resolv.conf.

For more information about the dns info command and resulting display, see the na_ dns(1) man page.