IEEE 802 Tutorial Congestion Notification

IEEE 802 Tutorial:Congestion Notification17 July 2006San Diego, CA¾¾¾¾¾¾¾¾¾¾AgendaOverviewPresenter: Pat Thaler; BroadcomChair IEEE 802.1 Congestion management subgroupMarketPresenter: Manoj Wadekar; IntelExample mechanism description and simulationDavide Bergamasco; CiscoDocument structurePresenter: Norm Finn; CiscoSummary and questionsPresenter: Pat ThalerOverviewPat Thaler¾¾¾¾Congestion NotificationCongestion NotificationCongestion Notification (CN) provides a means for a bridge to notify a source of congestion allowing the source to reduce the flow rate.CN is targeted at networks with low bandwidth delay products: e.g. data center and backplane networks Benefits: avoid frame loss; reduce latency; improve performanceAmendment to IEEE Std 802.1Q¾¾¾¾¾¾PAR scope*Specify protocols, procedures and managed objects for Congestion management oflong-lived data flowsIn network domains of limited bandwidth delay productBridges signal congestion to end stationsVLAN tag priority value segregates congestion controlled traffic Allows simultaneous support of congestion controlled and non-controlled domainsPAR scope, purpose and need are summarized on these slides. For full text see backup slides¾¾¾¾¾PAR purposeData center network and backplane fabrics that with applications that depend onLower latencyLower probability of packet lossAllowing these applications to share the network with traditional LAN ...