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QoS: Definition

Explore the political challenges of inter-AS end-to-end Quality of Service (QoS) and discover solutions that address these issues. Learn about different approaches taken by industry leaders and potential future advancements in the field. Research on quantifying loss in end-end connections is also discussed.

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QoS: Definition

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  1. QoS: Definition • “Quality of Service” • “Pay me more to drop their packets first” • Or “Quantity of Service” • Avi’s view • Most loss is between ASs; most backbones have resolved their intra-AS loss, except when router bugs or fiber cuts hit – i.e. more temporary, less chronic. • Research is needed to quantify this question (where most loss is on end-end connections)

  2. QoS: The Problem • Problems of inter-AS end-end QoS are primarily political, not technical • But they exist and apply to both transit and peering relationships • Transit • Hard to buy very burstable pipes affordably (burst “premiums”, full-pipe sales) • Peering • “How can you sell me connectivity if you don’t believe in connection to other networks” • Two camps, both affecting 50+% of packets • Even large providers have difficulty provisioning new pipes quickly

  3. QoS: Solutions • AboveNet’s solution • Peer aggressively, globally • Single-AS • Cold-potato (Honor MEDS + more specifics) • Akamai’s solution • Deploy across 1000+ ASs • Use OPP (other people’s peering) to hop (sometimes multi-hop) across networks • Netaxs’s solution • Peer but also buy transit from 2-3 providers; perform proactive monitoring of inter-AS connectivity and do route tuning automatically

  4. QoS: Futures • The “large-provider” aggregated-peering environments going in (primarily into Equinix facilities) in 5-8 cities • One goal is to be able to do cross-provider SLAs • Another approach is those who buy transit from many providers, +/- peering, +/- “intelligent route control software” • Big problems for the future remain political: • Coordinating “numbers in routers” and contracts, even among large providers • Coordinating with smaller/edge providers

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