Cisco Cisco IOS Software Release 12.2(27)SBC

To specify that the source and destination IP addresses of a given virtual private dialup network (VPDN) 
group belong to a specified Virtual Private Network (VPN) routing and forwarding (VRF) instance, use 
the vpn command in VPDN group or VPDN template configuration mode. To disassociate all IP 
addresses in a VPDN group from a VRF, use the no form of this command.

vpn {vrf vrf-name | id vpn-id}

VPDN groups are not associated with a VRF.

VPDN group configuration
VPDN template configuration

Use the vpn command to configure the Cisco IOS software to look up a VPDN source or destination IP 
address in a specific VPN routing table instead of the global routing table.

Before you can issue the vpn command, a VRF instance must be created using the ip vrf command.

The vpn command can be used with both dial-in and dial-out VPDN scenarios.

The following example associates the IP addresses configured in the VPDN group named group1 with 
the VRF named vrf-second:

pdn-group group1

request-dialin

protocol l2tp

!

vpn vrf vrf-second

source-ip 172.16.1.9

initiate-to ip 172.16.1.1

vrf vrf-name

Name of the VRF instance to be associated with the IP addresses of the 
VPDN group.

id vpn-id

VPN ID of the VRF to be associated with the IP addresses of the VPDN 
group.

12.2(15)T

This command was introduced.

12.3(7)XI7

This command was integrated into Cisco IOS Release 12.3(7)XI7 and 
implemented on the Cisco 10000 series routers.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

12.2(31)SB2

Support was added for the Cisco 10000 Series Router PRE3.