https://www.juniper.net/documentation/us/en/software/junos/security-services/topics/example/unicast-rpf-ex-series.html
This example shows how to help defend ingress interfaces against denial-of-service (DoS) and distributed denial-of-service (DDoS) attacks by configuring...
unicast rpfjunos osexampleconfiguringswitch
https://www.juniper.net/documentation/us/en/software/junos/security-services/topics/topic-map/interfaces-configuring-unicast-rpf.html
For interfaces that carry IPv4 or IPv6 traffic, you can reduce the impact of denial of service (DoS) attacks by configuring unicast reverse path forwarding...
unicast rpfjunos osjuniper networksunderstandingrouters