Premium IP is a new service available on GEANT/GN2 and some of the NRENs connected to it. It uses DiffServ
, and in particular the EF (Expedited Forwarding) PHB (per-hop behaviour) to protect a given aggregate of IP traffic against disturbances by other traffic, so that OneWayDelay
, and PacketLoss
are assured to be low. The aggregate is specified by source and destination IP address ranges, or by ingress/egress AS (Autonomous System) numbers when in the core domain. In addition, a Premium IP aggregate must conform to strict rate limits. Unlike earlier proposals of similar "Premium" services, GEANT/GN2's Premium IP service downgrades
excess traffic (over the contractual rate) to "best effort" (DSCP=0), rather than dropping it.
- 21 Apr 2005