BGP in review for 2025
About this episode
Geoff Huston reviews the developments in BGP for 2025, highlighting surprising shifts in the protocol's dynamics.
In this episode of PING, APNIC Chief Scientist Geoff Huston returns with his annual review of BGP, reflecting on developments across 2025. Geoff has been publishing this year-in-review analysis of BGP dynamics for more than a decade, and this time he has uncovered some genuinely surprising shifts. His 2025 analysis has been published in two parts on the APNIC Blog. Border Gateway Protocol (BGP) is the mechanism by which network operators announce their Internet address space to the rest of the world and, in turn, learn about the addresses announced by others. Operators participating in the global default-free zone receive all publicly announced routes, each expressed as an IP prefix and associated with its originating Autonomous System Number (ASN). Every BGP speaker has a unique ASN, and all routing information is exchanged and interpreted through this fundamental identifier. In effect, the ASN is the basic unit of interdomain routing. BGP also carries path information that describes how routing announcements traverse the network. This data informs routing policy decisions — which paths to prefer, and through which commercial or technical relationships. While the protocol itself…
People in this episode
Host: Geoff Huston
Topics covered
- BGP
- networking
- Internet protocols
- routing
- technology trends
Keywords
- BGP
- Border Gateway Protocol
- Autonomous System Number
- routing information
- network operators
Mentioned in this episode
Organizations: APNIC
Books & works: APNIC Blog
More episodes of PING
- IP Networking in Deep Space
- What does “BCP” really mean?
- bgproutes.io: A next-generation BGP data collection platform
- Measuring the use of DNS over IPv6
- Internet measurement in Thailand
- NITK Students at IETF: Fresh Minds for standards development
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