HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual page 641

Enter the following RIP configuration command to configure a passive
interface:
Syntax: passive-interface <interface ID>
For example, you might want the PPP 1 interface to be a passive interface:
ProCurve(config-rip)# passive-interface ppp 1
The following interfaces can be passive interfaces:
Ethernet interfaces
Ethernet subinterfaces (VLAN interfaces)
PPP interfaces
High-level Data Link Control (HDLC) interfaces
Frame Relay subinterfaces
ATM subinterfaces
loopback interfaces
tunnel interfaces
For example, you can configure a loopback interface as a passive interface to
prevent the routing from sending out redundant advertisements.
For another example, you can use a tunnel interface to receive RIP updates
from a remote VPN site. If you want the local router to receive updates but
not to advertise local networks, you should enable RIP on the tunnel and
specify the tunnel as a passive interface. Enter the follow commands:
ProCurve(config)# interface tunnel 1
ProCurve(config-tunnel)# ip address 192.168.100.1 /30
ProCurve(config-tunnel)# tunnel source 1.1.1.1
ProCurve(config-tunnel)# tunnel destination 1.1.1.2
ProCurve(config-tunnel)# exit
ProCurve(config)# router rip
ProCurve(config-rip)# network 192.168.100.1 255.255.255.252
ProCurve(config-rip)# passive-interface tunnel 1
For more information about configuring a tunnel, see Chapter 9: Configuring
a Tunnel with Generic Routing Encapsulation.
IP Routing—Configuring RIP, OSPF, BGP, and PBR
Configuring RIP
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