The scourge of excessive AS-SETs
Guest Post: Many AS-SETs have grown so large they effectively whitelist most of the routing table, defeating their purpose. How are AS-SETs actually used for filtering, and what can be done when they get too big?
Tag: BGP
Is ‘Postel’s law’ causing protocol ‘ossification’?
A recent routing incident sparks renewed debate on protocol design, error handling, and whether Postel’s law is helping or hurting the Internet’s evolution.
A day in the life of BGP
What an ordinary Thursday reveals about Internet routing from the edge.
BGPsec — could you run it if you wanted to?
Guest Post: Evaluating the current state of BGPsec implementations with hands-on experiments.
[Podcast] DFOH, MVP, and GILL: New ways of looking at BGP
Professor Cristel Pelsser discusses GILL, a new model for BGP data collection, and the application of Machine Learning to BGP analysis.
Analysis of a route leak
How the routing anomaly was visible and how it could be mitigated.
[Podcast] Pulse Internet Measurement Forum at APRICOT 2025: Part 2
The second PING recording from the first Pulse Internet Measurement Forum held during APRICOT 2025, featuring Amreesh Phokeer, Beau Geiskens, Doug Madory, and Lia Hestina.
‘BGP Flowspec doesn’t suck. We’re just using it wrong’
Guest Post: How proper testing and best practices can unlock the true potential of BGP Flowspec.
JPNIC RPKI guidelines released
Enhancing Internet routing security with ROA and ROV.
[Podcast] Night of the BGP zombies
Geoff discusses BGP ‘zombie’ routes — routes that should have been withdrawn but persist in the routing system. He explores how these anomalies might occur and what can be done to address them.