HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual page 502

Configuring a Tunnel with Generic Routing Encapsulation
Quick Start
9-16
8. Enable the routing protocol on the network on which the tunnel has its
IP address (not its source address):
a. If you are using RIP, enter:
ProCurve(config)# router rip
Syntax: network <A.B.C.D> <subnet mask>
For example:
ProCurve(config-rip)# network 192.168.10.0 255.255.255.0
b. If you are using OSPF, enter:
ProCurve(config)# router ospf
Syntax: network <A.B.C.D> <subnet mask> area <area ID>
For example:
ProCurve(config-ospf)# network 192.168.10.0 255.255.255.0 area 0
9. Make sure that the router's route table includes either a default route or
a route to the tunnel's destination:
ProCurve# show ip route
The forwarding interface cannot be the tunnel interface. If necessary, add
a route. For example:
ProCurve(config)# ip route 2.2.2.0 /24 ppp 1