Subscriber Services: DHCPv6 prefix delegation on EVPN IRB synchronization between multiple PE routers

You can use DHCPv6 prefix delegation (DHCPv6-PD) to automate the delegation of IPv6 prefixes to a requesting router on EVPN IRB. DHCPv6 prefix delegation is configured on EVPN IRB and provides IPv6 prefixes to the requesting clients, instead of the unique address. The DHCPv6-PD server acts as a provider edge (PE) router that provides the delegates through the relay (PE router) operating in the EVPN instance. If one PE router fails, appropriate DHCPv6-PD state is made available for the remaining PE routers participating in the DHCP-PD process for the given VLAN. This is done using automatic synchronization of DHCPv6-PD states between multiple PE routers connected to the same Ethernet Segment Identifier (ESI) through EVPN BGP messages.