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Manual Chapter: Configuration Guide for the BIG-IP® Link Controller: 7 - Defining Wide IPs
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7

Defining Wide IPs


Introducing wide IPs

After you configure the virtual servers that the Link Controller manages, you need to group the configured virtual servers into wide IPs. A wide IP is a mapping of a fully-qualified domain name (FQDN) to a set of virtual servers that host the domain's content, such as a web site, an e-commerce site, or a CDN.

Before defining the first wide IP, you should gather your configuration information for the Link Controller so you can easily see which virtual servers have the content you want to map to a domain name.

Configuring wide IPs

After you determine which virtual servers you should place in which wide IP, you are ready to add the first wide IP to the configuration.

To define a wide IP using the Configuration utility

  1. On the Main menu of the navigation pane, click Link Controller and then click Inbound Wide IPs.
    The main wide IP screen opens.
  2. Click the Create button.
    The New Wide IP screen opens.
  3. In the Name box, type the identifying name for this wide IP.
  4. In the Load Balancing Method setting, select the appropriate preferred, alternate, and fallback load balancing methods.
    For more information on load balancing, see Chapter 9, Inbound Load Balancing .
  5. In the Member List setting, select the virtual servers that you want to add to the wide IP.
  6. Click the Finished button to save your changes.

Repeat this process for each wide IP you want to add.

Using wildcard characters in wide IP names

The Link Controller supports wildcard characters in both wide IP names and wide IP aliases. You can use the wildcard characters to simplify your maintenance tasks if you have a large quantity of wide IP names and/or wide IP aliases. The wildcard characters you can use are: the question mark ( ? ), and the asterisk ( * ). The guidelines for using the wildcard characters are as follows:

  • The question mark ( ? )
    • You can use the question mark to replace a single character, with the exception of dots ( . ).
    • You can use more than one question mark in a wide IP name or alias.
    • You can use both the question mark and the asterisk in the same wide IP name or alias.
  • The asterisk ( * )
    • You can use the asterisk to replace multiple consecutive characters, with the exception of dots ( . ).
    • You can use more than one asterisk in a wide IP name or alias.
    • You can use both the question mark and the asterisk in the same wide IP name or alias.

The following examples are all valid uses of the wildcard characters for the wide IP name, www.mydomain.net.

  • ???.mydomain.net
  • www.??domain.net
  • www.my*.net
  • www.??*.net
  • www.my*.*
  • ???.my*.*
  • *.*.net
  • www.*.???

Modifying a wide IP

Once you have defined the basic settings for a wide IP, you can modify the wide IP settings, the load balancing properties, and the virtual server members at any time.

Modifying the basic wide IP settings

When you first add a wide IP to the configuration, you configure the basic settings. You may later decide to modify those settings.

To modify an existing wide IP using the Configuration utility

  1. On the Main menu of the navigation pane, click Link Controller and then click Inbound Wide IPs.
    The main wide IP screen opens.
  2. Click the name of the wide IP that you want to modify.
    The properties screen opens.
  3. Modify the wide IP settings as needed. For help on the specific settings, click the Help button.
  4. Click Update to save your changes.



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