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When several workstations are operating over an on-demand call, the frequent exchange of watchdog packets can keep the connection active most of the time. Depending on the telecommunications carrier you use for the connection, this can become expensive.
You can avoid this by configuring your router to spoof the watchdog packets. This means that the router captures watchdog query packets on their way to a workstation and responds on the workstation's behalf without activating the on-demand call.
Note, however, that because of spoofing, the workstation's server connection remains occupied unless the workstation logs out. To avoid this, have the remote server execute a forced logout of all workstations at a predetermined time so that all server connections are free for the next day.
For more information about watchdog spoofing and related topics, refer to Watchdog Packet Spoofing.
This section contains the following topics:
By default, watchdog spoofing is enabled for all on-demand WAN connections. If you want to disable watchdog spoofing on a WAN interface, complete the following steps:
Load NIASCFG, then select the following parameter path:
Select Configure NIAS > Protocols and Routing > Bindings > a WAN interface > Expert Bind Options
Select On Demand Spoofing , press Enter , then select Disabled .
Press Esc and save your change.
Press Esc to return to the Internetworking Configuration menu.
If you want this change to take effect immediately, select Reinitialize System .
If you want to configure other parameters, do so now, then reinitialize the system when you are finished.
By default, watchdog spoofing is enabled for all on-demand WAN connections. To configure watchdog spoofing for a particular on-demand WAN call destination, complete the following steps:
Load NIASCFG, then select the following parameter path:
Select Configure NIAS > Protocols and Routing > Bindings > a WAN interface > WAN Call Destinations
Select a call destination.
If you are modifying an on-demand call that has already been configured, select one from the list.
If you are configuring a new on-demand call, press Ins and choose a call from the list of available calls.
Select Expert Options .
Select On Demand Spoofing .
The default state is Use Default . This means the call uses the spoofing state to which the interface is currently set.
If spoofing is enabled on the interface but you want to disable it only for this call, select Disabled.
If spoofing is disabled on the interface but you want to enable it only for this call, select Enabled.
Press Esc and save your changes.
Press Esc to return to the Internetworking Configuration menu.
If you want these changes to take effect immediately, select Reinitialize System .
If you want to configure other parameters, do so now, then reinitialize the system when you are finished.
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