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Manual Chapter: BIG-IP version 9.2 - Solutions Guide for BIG-IP Traffic Management Systems: A Simple Intranet Configuration
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6

A Simple Intranet Configuration


Working with a simple intranet configuration

The simple intranet solution described in this chapter is commonly found in a corporate intranet (see Figure 6.1 ). In this scenario, 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.
Figure 6.1 A simple intranet configuration

As Figure 6.1 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. This way 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.

Creating the simple intranet configuration

To create this configuration, you need to complete the following tasks in order:

  • Create load balancing pools
    Create pools for the intranet servers you want to load balance and one for the cache server.
  • Create virtual servers
    Create the virtual servers for each pool and for the non-HTTP requests.

Creating pools

The first task in a basic configuration is to define the two load balancing pools: a pool for the intranet content servers and a pool for the Internet cache servers.

To create pool

  1. On the Main tab of the navigation pane, expand Local Traffic, and click Pools.
    The Pools screen opens.
  2. In the upper-right corner of the screen, click Create.
    The New Pool screen opens.
  3. In the Name box, type a name for the pool, such as http_pool.
  4. In the Resources area of the screen, use the New Members setting to add the pool members.
    For example, in Figure 6.1 , 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.

Creating virtual servers

The next task in a basic configuration is to create the virtual servers that reference http_pool and specificport_pool, respectively. You must also create a forwarding virtual server (with no pool) for remaining Internet traffic.

To create a virtual server

  1. On the Main tab of the navigation pane, expand Local Traffic, and click Virtual Servers.
    The Virtual Servers screen opens.
  2. In the upper-right corner of the screen, click Create.
    The New Virtual Server screen opens.
  3. In the Name box, type a name for the virtual server, such as vs_http, vs_specificport, or vs_non-http.
  4. In the Destination box, verify that the type of virtual server is Host, and in the Address box, 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 box, type 80, or select HTTP from the list.
  6. In the Configuration area of the screen, locate the Type setting and do the following:
    1. Select Standard if the virtual server is to process HTTP traffic to an intranet web site or to cache servers.
    2. Select Forwarding (IP) if the virtual server is to forward outgoing non-HTTP traffic.
  7. If you are creating a virtual server to process HTTP connections to an intranet web site, locate the HTTP Profile setting and select http.
  8. In the Resources area of the screen, locate the Default Pool setting and select the pool corresponding to the virtual server you are creating.
    For example, for vs_http, you would select the pool http_pool.
    Note: If you are creating a Forwarding (IP) virtual server, you do not select a pool.
  9. Click Finished.



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