📰 Dev.to · pathvector-dev

Reading a BGP event dispatcher as code: why announce gates the peer, withdraw skips the gate, and peer-down is the only branch that can touch many prefixes at o

Reading BGP export refresh as code: how one Loc-RIB change turns into an advertise for one peer, a withdraw for another, and silence for a third.

Trace a single received BGP route end to end through validation, import policy, best-path, and export — and watch nine sessions of isolated snippets turn into o

Reading BGP peer loss as code: why a single session going down triggers a set of withdrawals plus a per-prefix best-path recomputation, and why some prefixes su

RPKI tells you a route is invalid — it does not tell the router to drop it. Read the BGP policy layer as code and see why validation and policy are separate.

BGP picking a best path doesn't mean the origin AS is authorized — read RPKI origin validation as code and see why valid, invalid, and not_found are three disti