- Written by Yaonan Liang
- Posted on August 12, 2025
- Updated on August 27, 2025
- 879 Views
This feature provides support for advertising VPN-IPv4 Network Layer Reachability Information (NLRI) with IPv6 next-hops over IPv6 peering sessions described as the Extended Next Hop Encoding capability in RFC8950. Extended Next Hop Encoding capability can be supported for IPv4 unicast, IPv4 Labeled Unicast, and IPv4 VPN address and sub-address families (1/1, 1/4, 1/128 respectively) per RFC. The Extended Next Hop support for IPv4 unicast is described in RFC 5549 .