The objective of Pre-Congestion Notification (PCN) is to protect the quality of service (QoS) of inelastic flows within a Diffserv domain. On every link in the PCN-domain, the overall rate of PCN-traffic is metered, and PCN-packets are appropriately marked when certain configured rates are exceeded. Egress nodes provide decision points with information about the PCN-marks of PCN-packets that allows them to take decisions about whether to admit or block a new flow request, and to terminate some already admitted flows during serious pre-congestion. The PCN working group explored a number of approaches for encoding this pre-congestion information into the IP header. This document provides details of those approaches along with an explanation of the constraints that apply to any solution.
|Title of host publication||Proceeedings of the 84th Internet Engineering Task Force (IETF)|
|Place of Publication||Canada|
|Publisher||Internet Engineering Task Force (IETF)|
|Number of pages||20|
|Publication status||Published - Jul 2012|
|Event||84th Internet Engineering Task Force Meeting, IETF 2012 - Vancouver, Canada|
Duration: 29 Jul 2012 → 3 Aug 2012
Conference number: 84
|Name||RFC Document Series|
|Publisher||IETF (Ineternet Engineering Task Force)|
|Conference||84th Internet Engineering Task Force Meeting, IETF 2012|
|Period||29/07/12 → 3/08/12|
Karagiannis, G., Chan, K., Moncaster, T., Menth, M., Eardley, P., & Briscoe, B. (2012). Overview of Pre-Congestion Notification Encoding. In Proceeedings of the 84th Internet Engineering Task Force (IETF) (pp. 01-20). (RFC Document Series; No. 6627). Canada: Internet Engineering Task Force (IETF).