The WebMux™ Model 480S, 580SG, and 680PG User Guide – Version 7.0.x
Copyright© 1997-2006 CAI Networks, Inc.
14
Out-of-path mode also allows two WebMuxes to fully backup each other. The two
WebMuxes are connected to each other through a cross-over Ethernet cable.
Two simple changes must be made to each server in the farm. 1) Have a new
loopback adapter installed and have its address set to the farm address. Do not
set the gateway on the loopback adapter. Please refer to Appendix 1 and
Appendix 2 for how to configure a loopback adapter, as well as how to remove
the route from the servers.
Please note for Out-of-Path to work properly, the
loopback adapter must route the return traffic through the real network
interface. In other words, the loopback adapter cannot have the gateway
specified. Please refer to Appendix 1 and 2 for more details on how to
configure the loopback adapter on servers. In case the server is running
Windows 2003, the route created during adding loopback adapter cannot
be deleted; please make sure the loopback adapter has much higher metric.
2) If your service is bind to any specific IP address, add the loopback adapter’s
IP address to that service.
The firewall configuration must be changed to point to the new farm address on
the WebMux™. Since the WebMux™ always uses one IP address in the server
LAN, the farm address must be a different IP address in the server LAN in Out-
of-Path mode.
NOTE:
Under normal Out-of-Path operations, you will only need to set the external gateway IP
address for the WebMux ™ . However, if you are going to have the WebMux ™ do SSL
termination or Layer 7 load balancing, you must set a server LAN gateway IP in the WebMux™
and have the servers’ default gateway point to that IP address.
Summary of Contents for WebMux 480S
Page 4: ...iv...
