Tag
bgp
- Oct 24, 2026 BGP Sessions and Route Propagation over Hybrid Links How a gateway exchanges prefixes with a customer network over a dedicated link, why the AS path and local preference determine the winner, and how a flapping session poisons a route table. cloud infrastructure
- Jun 19, 2026 Flood and Learn Versus a BGP EVPN Control Plane How a tunnel endpoint discovers the remote endpoint for a MAC address by flooding and learning from the reply, what that costs at scale, and how a routing protocol replaces the guesswork. networking
- May 4, 2026 Remote Blackholing and FlowSpec Distribution How a network tells its upstream to drop traffic for a specific prefix or flow, why the trigger is a BGP route rather than a firewall rule, and what collateral damage the mechanism accepts by design. security
- Jan 1, 2026 The BGP Best-Path Order and Why Its Steps Are Ordered That Way The comparison sequence a router applies to routes for one prefix, which attributes are local to an autonomous system, and how the tiebreak steps create hot-potato routing. networking
- Oct 16, 2025 Reading a BGP Session Failure From Its State and Its Last Error How the session states narrow a failure to transport, capability negotiation, or policy, and why a session that reaches Established can still exchange no routes. networking
- Aug 16, 2025 CIDR Aggregation and the Reasons It Cannot Fully Summarize How prefix length replaced address classes, which blocks can be merged into one announcement, and why holes and multi-homing leave the table larger than the address plan suggests. networking
- Jun 6, 2025 Path Vectors, Policy, and Why BGP Does Not Minimize Anything How an exterior gateway protocol carries a whole path to detect loops, why the decision process ranks policy above distance, and what that costs at convergence time. computing history