Cisco 10000-2P2-2DC - Configuring Loose Mode Urpf with the Allow-Default Option

13-18
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 13 Unicast Reverse Path Forwarding
Configuration Examples of uRPF
Note After you enable the interface with uRPF using the allow-self ping option, initiate a self-ping to see
whether the self-ping option is successful.
Configuring Loose Mode uRPF with the allow-default Option
Example 13-7 shows how you can configure Loose Mode uRPF with the allow-default option.
Example 13-7 Loose Mode uRPF with the allow-default option
Router# conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# int g8/1/0
Router(config-if)# ip verify unicast source reachable-via any allow-default
Router(config-if)# end
Router# sh ru int gig8/1/0
!
interface GigabitEthernet8/1/0
ip address 80.1.1.1 255.255.255.0
ip verify unicast source reachable-via any allow-default
negotiation auto
end
Note For configuring Strict mode uRPF, replace the any keyword with rx in the ip verify unicast source
reachable-via command.