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  • Graph Configuration: Select which DNS messages you want to track in the Responses per Second graph.
      Note: If you have configured Unbound as the DNS resolver, the appliance collects the following information using unbound statistics.
      • Success: The number of successful queries.
      • NXDOMAIN: The number of queries for domain names that did not exist in the database.
      • Referral: The number of queries that became referrals. 
      • NXRRSET: The number of queries for domain names that did not have the requested records.
      • Failure: The number of queries that failed due to reasons other than nonexistent domain names or records in a domain.
      • Recursion: The number of recursive queries for which the name server sent queries to other name servers.

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    • DNS Responses tab: Displays a pie chart and the total number of each type of message. If you enable DNS Cache Acceleration service on an IB-4030 or IB-4030-10GE appliance and if the appliance is active, then the data throughput from this service is displayed in this tab.
    • Responses per Second tab: Displays a line graph that tracks the DNS responses received per second, within an hour. The displayed time is based on the time zone specified in the User Profile. If you enable the auto-detect time zone option in NIOS and Grid Manager cannot determine the browser time zone, the time is displayed in UTC format. You can mouse over the graph to display the coordinates of any point in the graph. If you configure the Grid member on an IB-4030 or IB-4030-10GE appliance with the DNS Cache Acceleration service enabled, then the data throughput from DNS Cache Acceleration service is displayed in this tab.
    • Cache Hit Ratio tab: Displays a bar chart showing the cumulative cache hit ratio performance for the Grid DNS member. The widget measures BIND traffic cache hits, and combines with results from caching when the Grid member is an IB-4030 or IB-4030-10GE appliance, or another caching server. The cache hit ratio (measured in percentage) is the total number of cache hits divided by the total number of cache lookups. The higher the ratio, the more effective the cache is at improving query performance. To maintain optimum performance when the cache hit ration drops below 95%, you can configure the appliance to use Unbound as the DNS resolver. 

    Reports for IB-4030 and IB-4030-10GE

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