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Manual Chapter: Setting Up the WAN Optimization Module
Manual Chapter
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This document is a high-level overview of setting up the BIG-IP® WAN Optimization Module. It covers the general procedures for using the Configuration utility in a point-to-point topology with traffic initiated on both sides of the WAN. The procedures in this guide assume that you accept the default values during system setup. For more details, refer to referenced documentation.
The BIG-IP® WAN Optimization Module improves distributed application performance by optimizing, thus reducing, the amount of data that is transferred over a wide area network (WAN).
WAN Optimization Modules work in pairs on opposite sides of the WAN to optimize the traffic that flows between them. A simple point-to-point configuration might include a WAN Optimization Module running on a BIG-IP system in a data center, and a second WAN Optimization Module running on a BIG-IP system in a branch office on the other side of the WAN. Other configuration possibilities include point-to-multipoint (also called hub and spoke) and mesh deployments.
We refer to each BIG-IP system that has a WAN Optimization Module as an endpoint. From the standpoint of each BIG-IP device, it is the local endpoint. The WAN Optimization Module on another BIG-IP system with which the local endpoint interacts is a remote endpoint. After you identify the endpoints, communication between the WAN Optimization Modules takes place in an iSession connection between the two devices.
When you configure the local WAN Optimization Module, you also identify any advertised routes, which are subnets that can be reached through the local endpoint. When viewed on a remote system, these subnets appear as remote advertised routes.
To optimize application traffic, you configure optimization policies to tell the system how you want to optimize different types of traffic. An optimization policy is a virtual server on the initiating side of the WAN, with which you associate a profile that listens for TCP traffic of a particular type (HTTP, CIFS, MAPI). You also configure a virtual server at the receiving side of the WAN, with which you associate a profile that terminates the iSession connection and forwards the traffic to its destination. If you are familiar with the BIG-IP system, you know about virtual servers and profiles. To learn about these components, refer to the Configuration Guide for BIG-IP® Local Traffic Management.
The default iSession profile, which is applied automatically to optimization policies, includes symmetric data deduplication and symmetric adaptive compression. For information about these features and their settings, refer to the Configuration Guide for the BIG-IP® WAN Optimization Module.
Because WAN optimization is tightly integrated as a module on the BIG-IP system, you need to be familiar with basic system and Local Traffic Manager concepts when setting up the WAN Optimization Module.
For details on installing the hardware, refer to the platform guide for the BIG-IP system you have. You can learn about BIG-IP system installation in the BIG-IP® Systems: Getting Started Guide.
For general BIG-IP system administration information on topics such as creating accounts, self IP addresses, VLANs, routes, and interfaces, refer to the TMOSTM Management Guide for BIG-IP® Systems.
For details about Local Traffic Manager, such as configuring virtual servers, profiles, and SSL traffic, refer to the Configuration Guide for BIG-IP® Local Traffic Management.
For details about the WAN Optimization Module, such as step-by-step procedures and options, refer to the Configuration Guide for the BIG-IP® WAN Optimization Module.
Before you can begin configuring a WAN Optimization Module, you need to complete the following initial configuration tasks on the BIG-IP system that includes the module. For details about logging in, running the Setup utility, and provisioning the modules, refer to the BIG-IP® Systems: Getting Started Guide.
1.
Assign the management IP address, netmask, and default route for the BIG-IP system, using the LCD panel on the front of the unit or connecting to the serial console. Most likely, you completed this task when you initially set up the hardware.
2.
Run the Setup utility, which includes licensing the BIG-IP system, using the browser-based Configuration utility.
3.
Provision the Local Traffic Manager and WAN Optimization Modules, using the browser-based Configuration utility.
If you are configuring the BIG-IP system in bridge mode, you need to configure two VLANs and a VLAN group. and then associate a self IP address with the VLAN group. This configuration allows the BIG-IP system to bridge the LAN and WAN subnets. For details about configuring VLANs, refer to the TMOSTM Management Guide for BIG-IP® Systems.
1.
Create a VLAN (for example, lan) with which you associate an internal interface (port),
This VLAN is for traffic that is to be optimized by the BIG-IP system you are configuring.
2.
Create a VLAN (for example, wan) with which you associate an external interface (port).
This VLAN terminates existing inbound iSession connections.
3.
Create a VLAN group (for example, bridge) that includes the internal and external VLANs you created.
4.
Create a self IP address, associating with it the VLAN group you created, and setting the Port Lockdown value to Allow None.
If you are configuring the BIG-IP system in routed mode, you need to configure separate self IP addresses for the internal and external interfaces. Also, you need to create a passthrough virtual server which you can use to check the connection before you try to optimize traffic.
1.
Create a VLAN (for example, lan) with which you associate an internal interface (port).
2.
Create a VLAN (for example, wan) with which you associate an external interface (port).
4.
Create a WAN self IP address with which you associate the external VLAN you created, and set the Port Lockdown value to Allow None.
6.
Configure a virtual server with the destination set to network IP address 0.0.0.0 and mask 0.0.0.0, and the virtual server type set to Fowarding (IP).
The purpose of this virtual server is to forward all IP traffic. You will create a separate virtual server for optimized traffic when you configure the WAN Optimization Module. For information about configuring virtual servers, refer to the Configuration Guide for BIG-IP® Local Traffic Management.
If you are configuring the BIG-IP system in one-arm mode, you need to configure the router to redirect the designated traffic to the WAN Optimization Module. On the BIG-IP system, you need to configure a single self IP address.
2.
Create a self IP address with which you associate the external VLAN, and set the Port Lockdown value to Allow None.
5.
If you are using WCCPv2, configure the parameters for the routers on the BIG-IP system (click WCCP under Network).
For details, refer to Configuring WCCPv2 Redirection in the Configuration Guide for the BIG-IP® WAN Optimization Module.
After you have configured the BIG-IP system, you can configure the WAN Optimization Module. The following procedure covers the main tasks you perform, using the Configuration utility. For details, refer to the Configuration Guide for the BIG-IP® WAN Optimization Module.
Note: For a point-to-point topology, the default settings are sufficient. Refer to the Configuration Guide for the BIG-IP® WAN Optimization Module for details about modifying these settings to match your network.
1.
Log on to the BIG-IP system that has the WAN Optimization Module you want to configure.
The default logon value for both user name and password is admin.
2.
On the Main tab of the navigation pane, expand WAN Optimization, and click Configuration to open the Local Endpoint Configuration screen.
3.
Add the local endpoint IP address, and click Save.
This IP address must be in the same subnet as a self IP address on the BIG-IP system. If you use a self IP address, set the Port Lockdown value to Allow None (on the Self IPs Properties screen) to avoid potential port conflicts.
4.
Create one or more advertised routes, that is, subnets that are reachable through the local endpoint you are configuring.
You also need a remote endpoint to complete the iSession connection. By default, dynamic discovery is enabled. After you configure optimization policies (see Configuring optimization policies) and begin to send traffic to a location behind another locally configured endpoint, the BIG-IP system will automatically add that endpoint as a remote endpoint. For information about manually configuring a remote endpoint, refer to the Configuration Guide for the BIG-IP® WAN Optimization Module.
Although WAN Optimization Modules are deployed in pairs, one on either side of the WAN, the network topology need not be the same on both sides.
Figure 1.1 depicts a network deployment in which one of the two BIG-IP systems was configured in bridge mode, and the other in routed mode. For an example of a one-arm deployment, see Figure 1.2.
Figure 1.2 depicts a simple one-arm deployment on both sides of the WAN.
After you configure the WAN Optimization Module, you can create optimization policies for the types of application traffic you want to optimize. The WAN Optimization Module provides common application optimization policies for CIFS, MAPI, and HTTP. For details about setting up custom application optimization policies, refer to the Configuration Guide for the BIG-IP® WAN Optimization Module.
2.
Click the Create button.
The Common Application Optimization Policies screen opens, listing the preconfigured policies that are available.
3.
Check the Select box next to the types of traffic you want to optimize (CIFS, MAPI, or HTTP), and then click Apply.
The system creates a virtual server for each type of traffic selected, and automatically assigns the necessary profiles, including the iSession profile, which contains settings for symmetric data deduplication and symmetric adaptive compression.
Note: If you select MAPI, you also need to create a virtual server for each Exchange server, either automatically or manually. For details, refer to the Configuration Guide for the BIG-IP® WAN Optimization Module.
When you configure the local endpoint on the other side of the WAN, by default, an iSession-terminating virtual server is created for optimized traffic sent to that remote endpoint. You need this virtual server to complete the iSession connection between the two WAN Optimization Modules.
After you have finished configuring the pair of WAN Optimization Modules, you can test connectivity between the local and remote endpoints from the initiating side, as follows.
2.
Make a request from a client on one side of the WAN for information from one of the servers on the other side of the WAN.
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