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  3. Common Elements for Wide IPs tasks
Manual Chapter : Common Elements for Wide IPs tasks

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BIG-IP DNS

  • 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.10, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0
Manual Chapter

Common Elements for Wide IPs tasks

  1. On the Main tab, click
    DNS
    GSLB
    Wide IPs
    .
    The Wide IP List screen opens.
  2. On the Main tab, click
    Link Controller
    Inbound Wide IPs
    .
    The Wide IP List screen opens.
  3. On the menu bar, click
    Pools
    .
  4. Click the name of the wide IP you want to modify.
  5. From the
    Load Balancing Method
     list, select
    Topology
    .
  6. From the
    Load Balancing Method
     list, select
    Global Availability
    .
  7. Click
    Create
    .
    The New Wide IP screen opens.
  8. Click
    Create
    .
    The New Wide IP List screen opens.
  9. Click
    Create
    .
  10. Click
    Add
    .
  11. Click
    Manage
    .
  12. Click
    Remove
    .
  13. Click
    Edit
    .
    The selected pool and ratio display in the
    Pool
     and
    Ratio
     fields. After you edit the values, click
    Add
     to re-add the pool and ratio to the list.
  14. Click
    Up
    .
  15. Click
    Down
    .
  16. Click
    Update
    .
  17. Click
    Finished
    .
  18. From the General Properties list, select
    Advanced
    .
  19. From the
    General Properties
     list, select
    Advanced
    .
  20. In the
    Name
     field, type a name for the wide IP.
    You can use two different wildcard characters in the wide IP name: asterisk (*) to represent several characters and question mark (?) to represent a single character. This reduces the number of aliases you have to add to the configuration.
  21. In the General Properties area, in the
    Name
     field, type a name for the wide IP.
    You can use two different wildcard characters in the wide IP name: asterisk (*) to represent several characters and question mark (?) to represent a single character. This reduces the number of aliases you have to add to the configuration.
  22. In the
    Name
     field, type the APN, for example
    apn.servprov.com
    .
  23. In the General Properties area, in the
    Name
     field, type the APN, for example
    apn.servprov.com
    .
  24. In the
    Name
     field, type a name for the wide IP.
  25. In the
    Name
     field, type a name for the wide IP.
    For this example, type
    www.siterequest.com
    .
  26. In the
    Type
     field, select a record type for the wide IP.
  27. From the
    Type
     list, select a record type for the wide IP.
  28. From the
    Type
     list, select one of these record types for the wide IP:
    NAPTR
    The Name Authority Pointer record, NAPTR, aids in the standardization of Uniform Resource Names (URNs). NAPTR records map between sets of URNs, URLs and plain domain names, and suggest to clients the protocols available for communication with the mapped resource.
    A
    The Address record, or A record, lists the IP address for a given host name.
    SRV
    The Service resource record, SRV, is a pointer with which an alias for a given service is redirected to another domain.
    CNAME
    The Canonical Name resource record, CNAME, specifies an alias or nickname for the official, or canonical, host name.
    AAAA
    The IPv6 Address record, or AAAA record, lists the 128-bit IPv6 address for a given host name.
    MX
    The Mail Exchange resource record, MX, defines the mail system(s) for a given domain.
  29. From the
    Type
     list, select a type.
    Once created, both the type and name cannot be changed.
  30. From the
    Type
     list, select any type.
  31. From the
    Type
     list, select a record type for the wide IP.
    Once created, both the record type and name cannot be changed.
  32. From the
    Type
     list, select a type to serve from the required DNS query types.
  33. From the
    Type
     list, select a record type to serve from the required DNS query types.
    If you want the BIG-IPDNS to respond to both A and CNAME record type requests, you must configure two wide IPs. One wide IP of type A with a CNAME pool type, and a second wide IP of type CNAME with a CNAME pool type. At a minimum, an A record type wide IP should be configured with a CNAME pool.
  34. In the
    Alias
     field, type an alternate domain name for the web site content being load balanced, and then click
    Add
    .
    You can either add multiple aliases, or use wildcard characters in the
    Name
     field.
  35. For the
    Member List
     field, add the virtual servers that you created previously.
    1. From the
      Virtual Server
       list, select a virtual server.
    2. Click
      Add
      .
  36. For the
    Member List
     field, add the address of the appropriate virtual server.
    1. From the
      Virtual Server
       list, select a virtual server.
    2. Click
      Add
      .
  37. For the
    Member List
     field, add the virtual servers that you created previously.
    For this example, from the
    Virtual Server
     list, select:
    • 10.10.10.80
      , and then click
      Add
      .
    • 10.20.20.80
      , and then click
      Add
      .
  38. For the
    Member List
     field, add the address of the appropriate virtual server.
    For this example, from the
    Virtual Server
     list, select:
    • 10.10.5.5:80
      , and then click
      Add
      .
    • 10.10.10.6:80
      , and then click
      Add
      .
  39. From the
    Load Balancing Method
     list, make selections from the
    Preferred
    ,
    Alternate
    , and
    Fallback
     lists.
  40. From the
    Load Balancing Method
     list, make selections from the three lists.
    For this example:
    • From the
      Preferred
       list, select
      Ratio
      .
    • From the
      Alternate
       list, select
      Round Robin
      .
    • From the
      Fallback
       list, select
      Round Robin
      .
  41. From the
    Load Balancing Method
     list, make selections from the three lists.
    For this example:
    • From the
      Preferred
       list, select
      Kilobytes/Second
      .
    • From the
      Alternate
       list, select
      Round Robin
      .
    • From the
      Fallback
       list, select
      Round Robin
      .
  42. From the
    State
     list, select
    Disabled
    .
  43. From the
    IPv6 NoError Response
     list, select
    Enabled
    .
    With this option enabled, the system responds faster to IPv6 requests for which it does not have AAAA records configured.
  44. From the
    NoError Response
     list, select
    Enabled
    .
    With this option enabled, the system responds faster to requests for which it does not have AAAA records configured.
  45. In the
    IPv6 NoError TTL
     field, type the number of seconds that the local DNS servers consider the IPv6 NoError response to be valid. When you set this value, you must enable the
    IPv6 NoError Response
     setting as well.
  46. In the
    NoError TTL
     field, type the number of seconds that the local DNS servers consider the NoError response to be valid. When you set this value, you must enable the
    NoError Response
     setting as well.
  47. From the
    Return Code On Failure
     list, select
    Enabled
    .
  48. From the
    RCODE
     list, select one of these options:
    NOERROR (No Error)
    No error condition.
    FORMERR (Query Format Error)
    The name server was unable to interpret the query.
    SERVFAIL (Server Failure)
    The name server was unable to process this query due to a problem with the name server.
    NXDOMAIN (Non Existent Domain)
    The domain name referenced in the query does not exist.
    NOTIMP (Not Implemented)
    The name server does not support the requested kind of query.
    REFUSED (Refuse To Answer)
    The name server refuses to perform the specified operation for policy reasons.
  49. In the
    SOA Negative Caching TTL
     field, type the number of seconds that the local DNS servers consider the Return Code On Failure to be valid.
  50. Add the iRules you want this wide IP to use for load balancing decisions.
    The system evaluates and applies iRules in the order in which they are listed.
    1. Select an iRule from the
      iRule
       list.
    2. Click
      Add
      .
  51. From the
    Load Balancing Method
     list, select the load balancing method the wide IP uses to select a pool.
  52. From the
    Load Balancing Method
     list, select
    Round Robin
    .
  53. In the Pools area, from the
    Load Balancing Method
     list, select
    Round Robin
    .
  54. Select the
    Ratio
     load balancing method for the wide IP to use to select a pool.
    If you select the Ratio load balancing method, you must also assign weights to the pools in the Pool list.
  55. From the
    Persistence
     list, select
    Enabled
    .
  56. In the
    Persistent TTL
     field, type the number of seconds the persistence entry is valid.
    This value can range from
    0
     to
    4294967295
     seconds.
  57. From the
    Pool
     list, select the pools that this wide IP uses for load balancing.
    The system evaluates the pools based on the wide IP load balancing method configured.
    1. From the
      Pool
       list, select a pool.
      A pool can belong to more than one wide IP.
    2. Click
      Add
      .
  58. In the Pools area, for the
    Pool List
     setting, select the pools that this wide IP uses for load balancing.
    The system evaluates the pools based on the wide IP load balancing method configured.
    1. From the
      Pool
       list, select a pool.
      A pool can belong to more than one wide IP.
    2. Click
      Add
      .
  59. From the
    Pool
     list, select the pool of PGW systems, and then click
    Add
    .
  60. From the
    Pool
     list, select the CNAME pool, and then click
    Add
    .
  61. In the Pools area, for the
    Pool List
     setting, from the
    Pool
     list, select the name of the CNAME pool, and then click
    Add
    .
  62. Specify the pools that this wide IP uses for load balancing.
    The system evaluates the pools in the order in which they are listed, until it finds a matching pool.
    1. From the
      Pool
       list, select a pool.
    2. In the
      Ratio
       field, type a number for the system to use with the Ratio load balancing method.
    3. Click
      Add
      .
  63. From the
    Last Resort Pool
     list, select a pool for the system to use when no other resources are available.
  64. To remove all other pools from the Pool list, click the name of each pool, and then click
    Remove
    .
  65. For the
    Load-Balancing Decision Log
     setting, select the check boxes of the options that you want to include in the high-speed remote logs.
    Check-box option
    Log information
    Pool Selection
    The pool selected to answer a DNS request, and why the pool was selected.
    Pool Traversal
    The pools in the wide IP considered during the load-balancing decision, and why the pool was selected.
    Pool Member Selection
    The pool member selected to answer a DNS request, and why the member was selected.
    Pool Member Traversal
    The members of the pool considered during the load-balancing decision, and why the member was selected.
    Example log for a wide IP configured for Ratio load balancing when
    Load-Balancing Decision Log
     is set to only
    Pool Selection
    :
    2013-03-14 15:40:05 bigip1.com to 10.10.10.9#34824: [wip.test.net A] [ratio selected pool (pool_b) with the first highest ratio counter (1)]
    Example log for a wide IP configured for Ratio load balancing when
    Load-Balancing Decision Log
     is set to both
    Pool Selection
     and
    Pool Traversal
    :
    2013-03-14 16:18:41 bigip1.com from 10.10.10.9#35902 [wip.test.net A] [ratio selected pool (pool_a) - ratio counter (0) is higher] [ratio skipped pool (pool_b) - ratio counter (0) is not higher] [ratio reset IPv4 ratio counter to original ratios - the best had zero ratio count] [ratio selected pool (pool_a) - ratio counter (1) is not higher] [ratio selected pool (pool_b) - ratio counter (1) is not higher] [ratio selected pool (pool_a) with the first highest ratio counter (1)]
  66. To change the order of the pools in the list, select a pool and click the
    Up
     or
    Down
     button to move the pool to another location in the list.
    When the Global Availability load balancing method is selected, the first pool in the list is the pool to which BIG-IP DNS sends all DNS requests, unless that pool is unavailable. The next pool in the list is the pool to which the system sends DNS requests when the first pool in the list is unavailable.
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