Disabling DNS cache on NetScaler.

Disabling DNS cache on NetScaler.

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Article ID: CTX221675

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Description

The article shows how to disable DNS cache on Citrix ADC. By default, CItrx ADC will process DNS queries to match records in cache for LB vserver type DNS, which is used for DNS proxy setup. This might impact CPU utilization of the appliance.

Instructions

By default DNS cache is enabled on NetScaler.

If we want to turn off the DNS cache on NetScaler, given below is the command:
  • set dns parameter -cachehitBypass ENABLED : To disable the DNS query processing and allow cache on ADC.

For flushing all the proxy records from the DNS cache on the NetScaler appliance:
  • flush dns proxyRecords




 

Additional Information

  • https://developer-docs.citrix.com/projects/citrix-adc-command-reference/en/latest/dns/dns-parameter/#set-dns-parameter
  • https://docs.citrix.com/en-us/citrix-adc/current-release/dns/configure-citrix-adc-proxy-server.html
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