User guide

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Appendix K
Multiple Uplink/VLAN Support
As of version 8.5.00, the WebMux support load balancing multiple uplink capabilities. You
can configure this feature using the command line interface command:
nwconfig—additional network configuration add/list/delete/install tool
With multiple uplink, you can configure the WebMux to use multiple ISPs and gateways. The
WebMux uses source based routing to be sure that packets that came in from one ISP will
return through the same ISP. All uplinks are useable simultaneously. Once you have
configured farms on both networks, the WebMux will monitor the default gateways of the
different uplinks and failover to any available ISPs should one ISP go down.
To set up multiple uplinks, first log into the command line interface via telnet on port 87 or
ssh on port 77. We will refer to the main network configuration of the WebMux (the IP
addresses created via the LCD setup or the “rec” page in the web GUI or rec_cmdline from
the CLI) as the “original” network. Networks created with the “nwconfig” command will be
referred to as “additional” networks.
Usage:
nwconfig -A|—add NAME -i|—ipaddr IPADDR [other options]
nwconfig -D|—delete NAME
nwconfig -I|—install NAME
nwconfig -L|—list [PATTERN …]
nwconfig -R|—replace NAME -i|—ipaddr IPADDR [other options]
nwconfig -U|—uninstall NAME
For the -A or —add case, the -i or —ipaddr option is required, but other options are optional.
Whatever information they supply is used, and what information they don’t supply is
calculated from the supplied information as best possible. However if an external gateway
address for routing is to be used, it must be supplied with -g or —gateway.
Options:
-A|—add NAME add new network configuration NAME
-D|—delete NAME delete existing network configuration NAME
-I|—install NAME install network described by network configuration NAME
-R|—replace NAME like -A, except allows configuration to already exist
-U|—uninstall NAME uninstall network described by network configuration NAME
-b|—broadcast BROADCAST broadcast address is BROADCAST, e.g.,
192.168.14.255
-g|—gateway GATEWAY address of gateway/router on the network is GATEWAY,
e.g. 192.168.14.1
—help|—usage print this usage message
-i|—ipaddr IPADDR WebMux’s IP address on the network is IPADDR, e.g.,
192.168.14.22
-L|—list [PATTERN … ] list existing additional network configurations whose name
match the given pattern(s). If no pattern is given, list all additional network
configurations.