Initial ConEx Deployment Examples draft-briscoe-conex-initial-deploy-00.txt draft-briscoe-conex-initial-deploy-00.txt apologies from Bob Briscoe, BT presented by Andrea Soppera, BT IETF-82 ConEx Nov 2011

draft status new individual draft draft-briscoe-conex-initial-deploy-00.txt intended status:informational immediate intent: WG feedback on scenarios finish the two ‘sketchy’ scenarios adopt as WG item?

chartered? “… the CONEX WG will initially focus on one use case, where the end hosts and the network that contains the destination end host are CONEX-enabled but other networks need not be.... Goals and Milestones Mar 2011 Submit use case description to IESG as Informational...“ We have now two documents: a)what benefits does ConEx bring? ietf-conex-concepts-uses covers thisietf-conex-concepts-uses b)deployment arrangements of systems using ConEx briscoe-conex-initial-deploy targets thisbriscoe-conex-initial-deploy we tried including (b) in concepts-uses but (b) talks mechanism – inappropriate for concepts-uses

pre-requisites reading order 1.draft-ietf-conex-concepts-uses 2.draft-ietf-conex-abstract-mech draft-briscoe-conex-initial-deploy

document structure A.recap (1p) refers to abstract-mech for details incremental deployment features of ConEx ConEx functional components B.first movers: senders C.network arrangements 1.single receiving network (the following slides) 2.mobile network → [draft-kutscher-conex-mobile] 3.internal to a multi-tenant data centre (write-up to be finished)

ConEx deployment features recap sender modification essential change each transport protocol incrementally no change required to queues & forwarding ECN not required in the network (but better if ECN) sender must at least ask receiver for ECN but OK if receiver not ECN-capable packets indicate whether they support ConEx

7 ConEx recap basic signals and functional units transport sender transport receiver congested network element policyaudit ECN loss SACK ECE Re-Echo-ECN Re-Echo-Loss DATA ACKS

some sources deploy ConEx first a speculative strategy that triggers ConEx deployment scavenging senders benefit the network, but the network can’t measure the benefit so scavenger tells the network the benefit (using ConEx) it knows the network monitors anything it can or the network operator is interested in a trial

single receiving network scenario I some sources deploy ConEx Software update app file-sharing app video streaming transport Legend Peering and Transit Dest ISP Z ConEx sources ConEx packets Non-ConEx packets Non-ConEx hosts BRAS Access Network ISP CDN Software Update File Sharing App

Legend single receiving network scenario II ConEx policerConEx monitorConEx audit ConEx sources ConEx packetsNon-ConEx packets for ConEx sources ISP Z replaces existing traffic management (e.g. Removing Application Rate Constraint) Customer consuming ConEx enabled traffic will perceive better service experience (e.g. Faster download) Non-ConEx hosts Peering and Transit Dest ISP Z BRAS Access Network File Sharing App Software Update ISP CDN

single receiving network scenario III Legend ConEx policerConEx monitorConEx audit ConEx sources ConEx packetsNon-ConEx packets ConEx policer/monitor can be distributed across multiple access interface -- remove need of centralised approach (traffic trombone) Non-ConEx hosts Peering and Transit Dest ISP Z BRAS Access Network ISP CDN File Sharing App Software Update

deployment incentives sources policed less than Non-ConEx traffic when sending large volumes if scavenging effectively network more satisfied customers – relaxed policing simpler traffic management simpler network design

status & plans review from Phil Eardley ‘better’ ASCII art wants similar scenario but start solely with trusted sources wants deployment incentives explained first plan – finish the document re-organise to describe incentives up front summarise mobile scenario [kutscher-conex-mobile] describe multi-tenant data centre scenario (simple) complete empty sections (e.g. tail pieces) working group input more reviews please WG feedback on scenarios? WG item?

Initial ConEx Deployment Examples draft-briscoe-conex-initial-deploy-00.txt draft-briscoe-conex-initial-deploy-00.txt Q&A