Requirements for Signaling of Pre-Congestion Information in a Diffserv Domain

Abstract

Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6663.

Flow termination signaling in the centralized pre-congestion notification architecture

“…A report contains an aggregate identification, NM rate , ThM rate , ETM rate and optionally the CLE. As per [5] , an egress-node may include flow-identifiers that represent flows that experienced ETM-traffic when sending a report to the DP. However, the flow-rate, i.e.…”

“…Decisions to take actions nodes has been suggested by other authors [5,6] . However, some essential components are missing in the signaling.…”

“…Hence, it is expected that results from existing research on the effectiveness of dPCN are also valid when cPCN is used. As in the aforementioned references [1][2][3][4][5][6] , our specifications and simulations are based on 'traditional' networks assuming an interior gateway protocol and destination based forwarding. However, the cPCN signaling architecture fits very well to the centralized nature of the control architecture of emerging Software Defined Networks (SDN, see e.g.…”

“…In SDN and cPCN, all signaling is decoupled from the data path since all signaling happens between SDN switches and the SDN controller. In [5] , requirements for signaling in a PCN-domain are described. Karagiannis et al [5] restricts to feedback signaling between egressnodes and DP and the signaling between DP and ingress-node on the aggregate-rate request.…”

“…In [5] , requirements for signaling in a PCN-domain are described. Karagiannis et al [5] restricts to feedback signaling between egressnodes and DP and the signaling between DP and ingress-node on the aggregate-rate request. The signaling between DP and ingressnodes on which flows to terminate and how to stop a source from sending a current (to be terminated) flow is not specified.…”