Features

Default route—When a default route exists, all packets that fail to match a specific IPv6 FIB entry match the default route during IPv6 uRPF check and thus are permitted to pass. If you allow using the default route (by using allow-default-route), IPv6 uRPF permits packets that only match the default route. By default, IPv6 uRPF discards packets that can only match a default route. Typically, you do not need to configure the allow-default-route keyword on a PE device because it has no default route pointing to the CE device. If you enable IPv6 uRPF on a CE that has a default route pointing to the PE, select the allow-default-route keyword.

IPv6 ACLs—To identify specific packets as valid packets, you can use an IPv6 ACL to match these packets. Even if the packets do not pass IPv6 uRPF check, they are still forwarded.