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Manual Chapter : Monitoring Third-Party Servers with SNMP

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Manual Chapter

Monitoring Third-Party Servers with SNMP

Overview: SNMP monitoring of third-party servers

You can configure BIG-IP DNS, formerly Global Traffic Manager (GTM), to acquire information about the health of a third-party server using SNMP. The server must be running an SNMP agent.

Creating an SNMP monitor

Create an SNMP monitor to monitor a third-party server running SNMP.
  1. On the Main tab, click
    Local Traffic
    Monitors
    .
    The Monitors List screen opens.
  2. On the Main tab, click
    DNS
    GSLB
    Monitors
    .
    The Monitor List screen opens.
  3. Click
    Create
    .
    The New Monitor screen opens.
  4. Type a name for the monitor.
    Monitor names are limited to 63 characters.
  5. From the
    Type
     list, select one of these options:
    SNMP DCA
    Use this monitor to specify new values for CPU, memory, and disk metrics.
    SNMP DCA Base
    Use this monitor to specify values for metrics other than CPU, memory, and disk usage.
  6. From the
    Type
     list, select
    SNMP
    .
  7. Click
    Finished
    .

Defining a third-party host server that is running SNMP

Ensure that the third-party host server is running SNMP. During this procedure, you assign a virtual server to the server; therefore, determine the IP address that you want to assign to the virtual server.
On the BIG-IP DNS, define a third-party host server that is the ultimate destination of DNS queries.
  1. On the Main tab, click
    DNS
    GSLB
    Servers
    .
    The Server List screen opens.
  2. Click
    Create
    .
    The New Server screen opens.
  3. In the
    Name
     field, type a name for the server.
    Server names are limited to 63 characters.
  4. From the
    Product
     list, select a third-party host server or select
    Generic Host
    .
    The server type determines the metrics that the system can collect from the server.
  5. In the Address List area, add the IP addresses of the server.
    1. Type an external (public) IP address in the
      Address
       field, and then click
      Add
      .
    2. If you use NAT, type an internal (private) IP address in the
      Translation
       field, and then click
      Add
      .
    You can add more than one IP address, depending on how the server interacts with the rest of your network.
  6. From the
    Data Center
     list, select the data center where the server resides.
  7. From the
    Prober Preference
     list, select the preferred type of prober(s).
    Inherit From Data Center
    By default, a server inherits the prober preference selection assigned to the data center in which the server resides.
    Inside Data Center
    A server selects the probers from inside the data center where the server resides.
    Outside Data Center
    A server selects the probers from outside the data center where the server resides.
    Specific Prober Pool
    Select one of the Prober pools from the drop-down list. When assigning the Prober pool at the server level.
    Note
    :
    Prober pools are not used by the bigip monitor.
  8. From the
    Prober Fallback
     list, select the type of prober(s) to be used if insufficient numbers of the preferred type are available.
    Inherit From Data Center
    By default, a server inherits the prober fallback selection assigned to the data center in which the server resides.
    Any Available
    For selecting any available prober.
    Inside Data Center
    A server selects probers from inside the data center where the server resides.
    Outside Data Center
    A server selects probers from outside the data center where the server resides.
    None
    No fallback probers are selected. Prober fallback is disabled.
    Specific Prober Pool
    Select one of the probers from the list When you want to assign a prober pool at the server level.
  9. From the
    State
     list, select
    Enabled
    .
  10. In the Health Monitors area, assign an SNMP monitor to the server by moving it from the
    Available
     list to the
    Selected
     list.
  11. From the
    Availability Requirements
     list, select an option and enter any required values.
    All Health Monitors
    By default, specifies that all of the selected health monitors must be successful before the server is considered up (available).
    At Least
    The minimum number of selected health monitors that must be successful before the server is considered up.
    Require
    The minimum number of successful probes required from the total number of probers requested.
  12. From the
    Virtual Server Discovery
     list, select
    Disabled
    .
  13. In the Virtual Server List area, create a virtual server to represent (in a pool) the host server that you are creating.
    1. In the
      Name
       field, type a name for the virtual server.
    2. In the
      Address
       field, type the IP address of the host server.
    3. From the
      Service Port
       list, select
      SNMP
      .
    4. Click
      Add
      .
  14. Click
    Finished
    .
    The Server List screen opens displaying the new server in the list.

Implementation result

BIG-IP® DNS can now use the SNMP monitor to verify the availability of and to collect statistics about the generic host.
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