User guide

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takes the Internet traffic and distributes it to the servers behind it. The LAN connecting the
WebMux and real servers together is called Server LAN.
WebMux has four modes: 2 Arm NAT Mode, 2 Arm Transparent Mode, 1 Arm Single
Network Mode, and 1 Arm Out-of-Path Mode. In NAT mode, the WebMux boxes are
connected to both Router LAN and Server LAN. At least one WebMux is needed to define
the Router LAN and the Server LAN. We will explain other modes in detail in later
chapters.
The side of the WebMux that connects to the Router LAN sends and receives all the IP
packets from the router to the Internet. The side of the WebMux that connects to the Server
LAN sends and receives IP packets to and from the servers in the farms. By properly
configuring the WebMux, one can create one or more Virtual Farms on top of the physical
hardware.
5.3 Hardware Setup — Collect Information
• Make a drawing of the existing network and note all the configuration settings. This
will help you to fall back to the existing configurations if needed.
• Make a new drawing for the new setup with the WebMux and the web farm in place.
This will be used as a guide for setup and preparation of all the necessary material
and equipment.
• Collect all the IP addresses, their network masks, network addresses, and broadcast
addresses for the Server LAN and Router LAN WebMux interfaces. The IP address
of the Internet router is also needed.
• Label all the cables. Prepare additional cables if needed.
• Make sure there are enough electrical or UPS outlets for all the new equipment.
5.4 Hardware Setup — Setup the new network
• Power down all the devices on the network.
• If you have a secondary WebMux, connect the WebMuxes with a cross-over Ethernet
cable.
• Connect the servers to the Server LAN.
• Connect the WebMux to the uplink switch.
• Power up all devices in the network.
• Verify that all the devices are up and running.
• You are now ready to configure WebMux.
5.5 Hardware Setup — Configuration Summary
CAUTION Do not proceed without collecting all necessary information.
Note The IP addresses in the following examples are general examples and are not
meant for literal use in an actual setup.