knowledge hub

Knowledge base

Technical articles written by our own engineers out of working practice: concrete commands, configuration snippets, protocol behaviour and trade-offs. No marketing copy.

24 June 20267 min read

BGP traffic engineering with flow data: communities, local-pref, AS-path prepending

Outbound traffic you control outright; inbound traffic you can only request. The levers that exist, the order the best-path algorithm applies them in, how flow data tells you which prefixes to move, and why your ROA decides whether deaggregation is even legal.

bgp
flow
traffic-engineering
rpki

2 June 20267 min read

Building a NetFlow/IPFIX pipeline with Akvorado and ClickHouse for a Tier-2 ISP

Exporter configuration, sampling rates, BMP and SNMP enrichment, the ClickHouse schema and the queries an operations team actually runs — plus the failure modes that silently corrupt every number in the console.

flow
netflow
ipfix
clickhouse
akvorado