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Manual Chapter: Configuration Guide for BIG-IP® version 9.2.2 Global Traffic Management: Discovering Resources through Auto-Discovery - 12
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12

Discovering Resources through Auto-Discovery


Introducing auto-discovery

A large network might consist of hundreds of virtual servers. Keeping track of these virtual servers can be a time-consuming process itself. The Global Traffic Manager includes a means of simplifying the addition of new virtual servers into a network: auto-discovery. Auto-discovery is a process through which the Global Traffic Manager identifies a resource automatically so you can manage it.

The Global Traffic Manager can discover two types of resources: virtual servers and links. Each resource is discovered on a per-server basis, so you can employ auto-discovery only on the servers you specify.

The auto-discovery feature of the Global Traffic Manager has four modes that control how the system identifies resources. These modes are:

  • Disabled. In this mode, the Global Traffic Manager does not attempt to discover any resources.
  • Enabled. In this mode, the Global Traffic Manager regularly checks the server to discover any new resources. If a previously-discovered resource cannot be found, the Global Traffic Manager deletes it from the system.
  • Enabled (No Delete). In this mode, the Global Traffic Manager constantly checks the server to discover any new resources. Unlike the Enabled mode, the Enabled (No Delete) mode does not delete resources, even if the system cannot currently verify their presence.
  • One Time Discovery. In this mode, the Global Traffic Manager checks once for any new resources. This mode is useful during the initial configuration and setup of the Global Traffic Manager.

You interact with the auto-discovery feature in a variety of ways. You can:

  • Enable auto-discovery
  • Set the discovery frequency
  • Discover virtual servers
  • Discover links

Enabling auto-discovery

Before you can use the Global Traffic Manager to discover virtual servers or links, you must enable auto-discovery on the system itself. If you do not enable auto-discovery, the Global Traffic Manager does not discover new resources, even you enable discovery on the server level. Auto-discovery is enabled by default for the Global Traffic Manager.

To enable auto-discovery

  1. On the Main tab of the navigation pane, expand System and then click General Properties.
    The general properties screen opens.
  2. From the Global Traffic menu, choose General.
    The general global properties screen opens.
  3. Check the Auto-Discovery check box.
  4. Click the Update button to save your changes.

Setting the discovery frequency

Two discovery modes, Enabled and Enabled (No Delete), instruct the Global Traffic Manager to continually monitor servers for new resources. You configure the frequency at which the system queries for new resources in the general properties screen. By default, the system queries servers for new resources every 30 seconds.

To set the discovery frequency

  1. On the Main tab of the navigation pane, expand System and then click General Properties.
    The general properties screen opens.
  2. From the Global Traffic menu, choose General.
    The general global properties screen opens.
  3. In the Auto-Discovery Request Interval box, type the frequency at which you want the system to attempt to discover new resources.
  4. Click the Update button to save your changes.

Discovering virtual servers

One of the resources you can discover with the Global Traffic Manager is virtual servers. Auto-discovery is particularly useful in this situation because many servers might have a considerable number of associated virtual servers that would be difficult to add manually. Auto-discovery of virtual servers is disabled by default when you create a new server.

To discover virtual servers

  1. On the Main tab of the navigation pane, expand Global Traffic and then click Servers.
    The main servers screen opens.
  2. Click the name of the server.
    The properties page for that server opens.
  3. On the menu bar, click Virtual Servers.
    The main virtual servers screen opens.
  4. From the Virtual Server Discovery list, select an appropriate discovery setting.
    You can select Disabled, Enabled, Enabled (No Delete), or One Time Discovery.
  5. Click the Update button to save your changes.

Discovering links

One of the resources you can discover with the Global Traffic Manager is links. A link is a connection between your internal network and the Internet. Enabling the link discovery feature instructs the system to identify any Internet links associated with the server. Auto-discovery of virtual servers is disabled by default when you create a new server.

To discover virtual servers

  1. On the Main tab of the navigation pane, expand Global Traffic and then click Servers.
    The main server screen opens.
  2. Click the name of the server.
    The properties page for that server opens.
  3. On the menu bar, click Links.
    The main links screen opens.
  4. From the Link Discovery list, select a discovery setting.
    You can select Disabled, Enabled, Enabled (No Delete), or One Time Discovery.
  5. Click the Update button to save your changes.



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