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Manual Chapter: Configuring a Simple Intranet
Manual Chapter
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Overview: A simple intranet configuration

The simple intranet implementation is commonly found in a corporate intranet (see the following illustration). In this implementation, the BIG-IP system performs load balancing for several different types of connection requests:

  • HTTP connections to the company's intranet web site. The BIG-IP system load balances the two web servers that host the corporate intranet web site, Corporate.main.net.
  • HTTP connections to Internet content. These are handled through a pair of cache servers that are also load balanced by the BIG-IP system.
  • Non-HTTP connections to the Internet.

As the illustration shows, the non-intranet connections are handled by wildcard virtual servers; that is, servers with the IP address 0.0.0.0. The wildcard virtual server that is handling traffic to the cache servers is port specific, specifying port 80 for HTTP requests. As a result, all HTTP requests not matching an IP address on the intranet are directed to the cache server. The wildcard virtual server handling non-HTTP requests is a default wildcard server. A default wildcard virtual server is one that uses only port 0. This makes it a catch-all match for outgoing traffic that does not match any standard virtual server or any port-specific wildcard virtual server.

Task summary

To create this configuration, you need to complete these tasks.

Task list

Creating a pool

You can a create pool of servers that you group together to receive and process traffic, to efficiently distribute the load on your server resources.
  1. On the Main tab, click Local Traffic > Pools. The Pool List screen opens.
  2. Click Create. The New Pool screen opens.
  3. In the Name field, type a unique name for the pool.
  4. In the Resources area of the screen, use the New Members setting to add the pool members. For example, in the illustration, the pool members for http_pool are 192.168.100.10:80 and 192.168.100.11:80. The pool members for specificport_pool are 192.168.100.20:80 and 192.168.100.21:80.
  5. Click Finished.
The load balancing pool appears in the Pools list.

Creating a virtual server

This task creates a destination IP address for application traffic. As part of this task, you must assign the relevant pool to the virtual server.
  1. On the Main tab, click Local Traffic > Virtual Servers. The Virtual Server List screen displays a list of existing virtual servers.
  2. Click the Create button. The New Virtual Server screen opens.
  3. In the Name field, type a unique name for the virtual server.
  4. In the Destination field, verify that the type of virtual server is Host, and in the Addressfield, type an IP address for the virtual server. For example, you can assign the IP address 192.168.200.30:80 to the virtual server that processes HTTP traffic. For load balancing connections to cache servers, you can assign the address 0.0.0.0:80 to the virtual server, making it a wildcard virtual server. To create a forwarding virtual server, you can assign the address 0.0.0.0:0.
  5. In the Service Port field, type 80, or select HTTP from the list.
  6. In the Configuration area of the screen, locate the Type setting and select either Standard or Forwarding (IP).
  7. From the HTTP Profile list, select an HTTP profile.
  8. In the Resources area of the screen, from the Default Pool list, select a pool name.
  9. Click Finished.
You now have a virtual server to use as a destination address for application traffic.
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