Manual Chapter : Common elements for DNS general config

Applies To:

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BIG-IP DNS

  • 15.0.0
Manual Chapter

Common elements for DNS general config

  1. On the Main tab, click
    DNS
    Settings
    GSLB
    Load Balancing
    .
    The GSLB Load Balancing configuration screen opens.
  2. On the Main tab, click
    System
    Configuration
    Device
    DNS
    .
    The DNS Device configuration screen opens.
  3. On the Main tab, click
    DNS
    Settings
    Caches
    .
    The DNS Cache configuration screen opens.
  4. On the Main tab, click
    System
    Configuration
    Local Traffic
    DNS
    .
    The DNS Local Traffic configuration screen opens.
  5. Click
    Update
    .
  6. In the DNS Lookup Server List area, in the
    Address
    field, type the IP address of the DNS server(s) you want to add.
    The system uses these DNS servers to validate DNS lookups and resolve host names. Then, click
    Add
    .
    If you did not disable DHCP before the first boot of the system, and if the DHCP server provides the information about your local DNS servers, then this field is automatically populated.
  7. View the
    DNS Lookup Server List
    settings to determine if any DNS servers have been configured on the BIG-IP system.
  8. In the
    Minimum TTL
    field, type the minimum number of seconds you want the system to cache DNS resource records.
    When you configure this setting the system can cache resource records longer than the owner of the records intended.
  9. In the
    Maximum TTL
    field, type the number of seconds after which you want the system to re-query for resource records.
    With this setting, the system can re-query for resource records sooner than the owner of the records intended.
  10. In the
    EDNS Buffer Size
    field, type the number of bytes you want the system to advertise as the EDNS buffer size in UDP queries.
    The default value for EDNS is
    4096
    bytes.
  11. For the
    Static Persist CIDR (IPv4)
    setting, type the number of bits that determine the IP address range for IPv4 addresses.
    The default value is
    32
    .
  12. For the
    Static Persist CIDR (IPv6)
    setting, type the number of bits that determine the IP address range for IPv6 addresses.
    The default value is
    128
    .