IPv4 NLRI with IPv6 Next Hop Use Cases

Document Type Replaced Internet-Draft (individual)
Authors Gyan Mishra  , Mankamana Mishra  , Jeff Tantsura  , Lili Wang  , Qing Yang  , Adam Simpson  , Shuanglong Chen 
Last updated 2021-03-22
Replaced by draft-mishra-bess-deplment-guidlin-ipv4nlri-ipv6nh
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


As Enterprises and Service Providers upgrade their brown field or green field MPLS/SR core to an IPv6 transport, Multiprotocol BGP (MP- BGP)now plays an important role in the transition of the core as well as edge from IPv4 to IPv6. Operators can now continue to support legacy IPv4, VPN-IPv4, and Multicast VPN-IPv4 customers. This document describes the critical use case and OPEX savings of being able to leverage the MP-BGP capability exchange usage as a pure transport, allowing both IPv4 and IPv6 to be carried over the same BGP TCP session. By doing so, allows for the elimination of Dual Stacking on the PE-CE connections. Thus making the eBGP peering IPv6-ONLY to now carry both IPv4 and IPv6 Network Layer Reachability Information (NLRI). This document now provides a solution for IXPs (Internet Exchange points) that are facing IPv4 address depletion at these peering points to use BGP-MP capability exchange defined in [RFC8950] to carry IPv4 (Network Layer Reachability Information) NLRI in an IPv6 next hop using the [RFC5565] softwire mesh framework.


Gyan Mishra (gyan.s.mishra@verizon.com)
Mankamana Mishra (mankamis@cisco.com)
Jeff Tantsura (jefftant.ietf@gmail.com)
Lili Wang (liliw@juniper.net)
Qing Yang (qyang@arista.com)
Adam Simpson (adam.1.simpson@nokia.com)
Shuanglong Chen (chenshuanglong@huawei.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)