Comments on the Usefulness of Simple Best-Effort Traffic - PowerPoint PPT Presentation

About This Presentation
Title:

Comments on the Usefulness of Simple Best-Effort Traffic

Description:

Comments on the Usefulness of Simple BestEffort Traffic – PowerPoint PPT presentation

Number of Views:18
Avg rating:3.0/5.0
Slides: 8
Provided by: Sally110
Learn more at: http://www.icir.org
Category:

less

Transcript and Presenter's Notes

Title: Comments on the Usefulness of Simple Best-Effort Traffic


1
Comments on the Usefulness of Simple Best-Effort
Traffic
  • Sally Floyd and Mark Allman
  • draft-floyd-tsvwg-besteffort-00.txt
  • TSVWG
  • July 2007

2
On simple best-effort traffic
  • Simple best-effort traffic serves a useful role
    in the Internet, and is worth keeping.
  • While traffic with Quality of Service
    mechanisms, congestion-based pricing, or the like
    can also be useful, we believe that they are
    useful as adjuncts to simple best-effort
    traffic, not as replacements of simple
    best-effort traffic.

3
On flow-based fairness for simple best-effort
traffic
  • For simple best-effort traffic, some form of
    rough flow rate fairness is a useful goal for
    resource allocation.

4
The Usefulness of Simple Best-Effort Traffic
  • Minimal technical demands on the network
    infrastructure.
  • Minimal demands in terms of economic
    infrastructure.
  • Usefulness in the real world.

5
The Limitations of Simple Best-Effort Traffic
  • QoS
  • The enforcement of fairness.

6
The Usefulness of Flow-Based Fairness for Simple
Best-Effort Traffic
  • Minimal technical demands on the network
    infrastructure.
  • Minimal demands in terms of economic
    infrastructure.
  • Usefulness in the real world.
  • Getting a share of the available bandwidth.

7
The Limitations of Flow-based Fairness for Simple
Best-Effort Traffic
  • The difficulties of enforcement.
  • How is flow-based fairness defined?
  • Granularity?
  • RTT-fairness?
  • Multiple congested routers?
  • Bursty vs. smooth traffic?
  • Packets vs. bytes?
  • Unicast vs. multicast?
  • Fairness over time?
Write a Comment
User Comments (0)
About PowerShow.com