RAD Data comm Modular Access Device with Integrated Router 用户手册

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. 

Keep Alive (IPX) 

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 

(default) 

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.