Cisco ASR 9000 Series - Cisco ASR 9000 Series Aggregation Services Router Broadband Network Gateway Command Reference

When strict unicast RPF is enabled on an interface, the router examines all packets received on that interface.
The router checks to make sure that the source address appears in the routing table and matches the interface
on which the packet was received.
When loose unicast RPF is enabled on an interface, the router examines all packets received on that interface.
The router checks to make sure that the source address can be reached through any of the router interfaces.
Task ID
OperationsTask ID
read, writeipv4
read, writenetwork
read, writeconfig-services
Examples
This example shows how to configure strict RPF on dynamic template configuration mode:
RP/0/RSP0/CPU0:router# configure
RP/0/RSP0/CPU0:router(config)# dynamic-template type ppp p1
RP/0/RSP0/CPU0:router(config-dynamic-template-type)# ipv4 verify unicast source reachable-via
rx
Cisco ASR 9000 Series Aggregation Services Router Broadband Network Gateway Command Reference, Release
5.2.x
305
IPv4 and IPv6 Commands
ipv4 verify unicast source reachable-via (BNG)