User guide

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Model Number: 481SD 592SGQ 690PG
Miscellaneous
Power and Heat (MAX at full load) 100W/300BTU 200W/500BTU 350W/1000BTU
Factory warranty 1 years 1 years 1 years
Free telephone and email support 1 years 1 years 1 years
Overnight pre-sent exchange unit Optional Optional Optional
24x7 Gold Premium Support Optional Optional Optional
30-day money-back guarantee Yes Yes Yes
¹Bond interfaces for max throughput in VLAN only mode
²With CAI-RSA3500 option card
³With CAI-RSA7000 option card
3.1 Topology Overview
The WebMux has four modes: 2 Arm NAT Mode, 2 Arm Transparent Mode, 1 Arm Single
Network Mode, and 1 Arm Out-of-Path Mode. IPV4 and IPV6 work in all those modes. Each
mode has its advantages and disadvantages.
3.2 Two-armed NAT Mode
Let us look at NAT mode first (Transparent Mode refers to the same diagram).
The main purpose of the WebMux is to balance the traffic among multiple web or other
servers. The diagram above shows a NAT installation with two WebMuxes. In this
configuration, one WebMux is serving as the primary, and the other is serving as the
secondary, or backup, providing a fault tolerant solution.
In order for the web servers to share the incoming traffic, the WebMux must be connected to
the network. There are two interfaces on the WebMux. One interface (Internet) connects to
the Router LAN. This is the network to which the Internet router is connected. The other
interface (server) is connected to the Server LAN. This network connects to all the web
servers. The WebMux routes traffic between these two networks.