Subject: A Data Plane TE/QoS Machnism

From: "Liubing (Leo)" <[email-masked]>
Date: Wed, 10 Jul 2019 10:04:45 +0000

Hi Dear all,

I've uploaded a new draft (as below), which introduces a mechanism to allow the devices to switch flows among multiple paths between a pairs of Ingress/Egress routers. The flow switch is based on real-time measurement of congestion situation of the paths.

Such mechanism could be used to do load balancing, SLA assurance and reliability etc. And we've had a commercial router hardware based prototype in our lab (SRv6 data plane) for network load balancing use case.

The mechanism is related to TE (or maybe QoS) and SRv6, I'd like to hear opinions from our WG from a more comprehensive routing perspective. Your comments would be appreciated very much!

Best regards,
Bing

*************************************Draft Info**********************************

Name:                  draft-liu-ican

Revision:              00

Title:                     Instant Congestion Assessment Network (iCAN) for Data Plane Traffic Engineering

Document date: 2019-07-08

Group:                  Individual Submission

Pages:                  8

URL:            https://www.ietf.org/internet-drafts/draft-liu-ican-00.txt

Status:         https://datatracker.ietf.org/doc/draft-liu-ican/

Htmlized:       https://tools.ietf.org/html/draft-liu-ican-00

Htmlized:       https://datatracker.ietf.org/doc/html/draft-liu-ican

Abstract:

   iCAN (instant Congestion Assessment Network) is a set of mechanisms

   running directly on network nodes:

   -  To adjust the flows paths based on real-time measurement of the

      candidate paths.

   -  The measurement is to reflect the congestion situation of each

      path, so that the ingress nodes could decide which flows need to

      be switched from a path to another.

   This is something that current SDN and TE technologies can hardly

   achieve:

   -  SDN Controller is slow and far from the data plane, it is neither

      able to assess the real-time congestion situation of each path,

      nor able to assure the data plane always go as expected

      (especially in SRv6 scenarios).  However, iCAN can work with SDN

      perfectly: controller planning multi-path transmission, and iCAN

      does the flow optimization automatically.

   -  Traditional TE is not able to adjust the flow paths in real-time.