Chapter 5 Setup Menu FCD-IPM Installation and Operation Manual
5-96 WAN Economy Menu
routers, answer for the remote devices. This fools (spoofs) the LAN device into thinking that the remote LAN is still connected, even though it is not. The spoofing saves the WAN bandwidth, because no packet is ever sent out on the WAN. Configure the following parameters for the Spoofing Menu. Table 5-33. IP/IPX Spoofing Parameters Parameters Possible Values Description
Keep Alive (IPX) Enable
Disable
Enables/Disables the Keep Alive mode. Keep Alive mode allows the
remote user to remain on the local server station list for a specified
period of time during link disconnection
Note: SPX spoofing is not supported.
RIP/SAP Spoofing
(IP/IPX)
Spoofing is a technique used to reduce network overhead, especially
in a WAN. Some network protocols send frequent packets for
management purposes. These can be routing updates or keep-alive
messages. In a WAN this can introduce significant overhead, due to
the typically smaller bandwidth of WAN connections.
Select this parameter to determine the length of time (in minutes)
between exchange of RIP and IPX SAP tables over the WAN. This
parameter is applicable unless spoofing mode is set to "Upon
Change" only.
Change Link
Spoofing Mode
Disabled (default)
Enabled
Enabled COD
When disabled, RIP/SAP updates are sent:
• After a defined time (default time is 30 seconds IP, 60 seconds
IPX RIP and SAP)
• When there is a change in the network topology; for example an
interface goes up or down, or a routing entry aged
When enabled, RIP/SAP updates are sent:
• After a defined time
• When there is a change in the network topology
• After a defined time and a change in network topology
When this parameter is set to Enabled COD, updates are sent
according to:
• The disabled parameter when the line is up.
• The enabled parameter when the line down.