BGP-LS Extension for Inter-AS Topology Retrieval

Document Type Expired Internet-Draft (idr WG)
Authors Aijun Wang  , Huaimo Chen  , Ketan Talaulikar  , Shunwan Zhuang 
Last updated 2021-04-01 (latest revision 2020-09-28)
Replaces draft-wang-idr-bgpls-inter-as-topology-ext
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes the process to build Border Gateway Protocol- Link State (BGP-LS) key parameters in inter-domain scenario, defines one new BGP-LS Network Layer Reachability Information (NLRI) type (Stub Link NLRI) and some new inter Autonomous (inter-AS) Traffic Engineering (TE) related Type-Length-Values (TLVs) for BGP-LS to let Software Definition Network (SDN) controller retrieve the network topology automatically under various inter-AS environments. Such extension and process can enable the network operator to collect the interconnect information between different domains and then calculate the overall network topology automatically based on the information provided by BGP-LS protocol.


Aijun Wang (
Huaimo Chen (
Ketan Talaulikar (
Shunwan Zhuang (

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