BGP Communities: The Feature Everyone Ignores
BGP communities ship on every router. Most operators use three of them. Large communities, RFC 8092, selective announcement, RTBH signaling — the full feature set sits untouched in most networks.
BGP communities ship on every router. Most operators use three of them. Large communities, RFC 8092, selective announcement, RTBH signaling — the full feature set sits untouched in most networks.
Cisco says third-party optics void your support contract. The MSA says otherwise. Here's what the standards actually guarantee, what vendor lock costs at scale, and how to run the risk-adjusted calculation.
An OTDR finds breaks, splices, and macrobends. It tells you nothing about the cause of 80% of optical link failures: contaminated connectors. Here's what actual fiber testing looks like — and how an SFP-based microOTDR changes the economics.
Optical components are often compared based on unit price. This does not reflect the total cost. The most cost-effective component is the one that integrates without requiring ongoing effort to keep it stable.
A system runs stable for months, then starts showing intermittent link resets after a routine update. Nothing is technically broken. The system behavior has changed.