Draytek vigor2920 series User Manual page 289

RIP Direction - The option specifies the direction of RIP
(Routing Information Protocol) packets. You can
enable/disable one of direction here. Herein, we provide four
options: TX/RX Both, TX Only, RX Only, and Disable.
From first subnet to remote network, you have to do -
If the remote network only allows you to dial in with single IP,
please choose NAT, otherwise choose Route.
Change default route to this VPN tunnel - Check this box to
change the default route with this VPN tunnel. Note that this
setting is available only for one WAN interface is enabled. It is
not available when both WAN interfaces are enabled.
2. After finishing all the settings here, please click OK to save the configuration.
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Vigor2920 Series User's Guide