IPv6 Unicast Reverse Path Forwarding (uRPF) can help limit malicious IPv6  traffic on a network. uRPF works by

4.24.2 F IPv6 URPF

Unicast Reverse Path Forwarding (uRPF) can help limit malicious IPv4/IPv6 traffic on a network. uRPF works by enabling the router to verify reachability (routing) of the source IP address (SIP) in the packet being forwarded. If the SIP is determined to be an invalid address, the packet is dropped.