Everything you wanted to know about Link Layer Adaptation

This is a skeleton for the fully-expanded page

Linked from: http://www.bufferbloat.net/projects/cerowrt/wiki/Setting_up_AQM_for_CeroWrt_310

However, certain link types have smaller overheads, and if you can ascertain your link types (whether it’s LLC or VC-Mux based), you can use these smaller overheads: Try one of the Tests for Bufferbloat after making the change.

LLC-based Overheads:

  • PPPoA - 14 (PPP - 2, ATM - 12)
  • PPPoE - 40+ (PPPoE - 8, ATM - 18, ethernet 14, possibly FCS - 4+padding)
  • Bridged - 32 (ATM - 18, ethernet 14, possibly FCS - 4+padding)
  • IPoA - 16 (ATM - 16)

VC-Mux based Overheads:

  • PPPoA - 10 (PPP - 2, ATM - 8)
  • PPPoE - 32+ (PPPoE - 8, ATM - 10, ethernet 14, possibly FCS - 4+padding)
  • Bridged - 24+ (ATM - 10, ethernet 14, possibly FCS - 4+padding)
  • IPoA - 8 (ATM - 8)

Need to incorporate some discussion of VDSL?

To edit this page, submit a pull request to the Github repository.
RSS feed

Recent News & Articles

Feb 10, 2017 Wiki page
What to do about Bufferbloat?
Feb 10, 2017 Wiki page
More about Bufferbloat
Dec 27, 2016 Wiki page
RRUL Chart Explanation
Jul 4, 2016 Wiki page
Getting SQM Running Right

Find us elsewhere

Bufferbloat Mailing Lists
#bufferbloat on Twitter
Google+ group
Archived Bufferbloat pages from the Wayback Machine

Sponsors

Comcast Research Innovation Fund
Nlnet Foundation
Shuttleworth Foundation
GoFundMe

Bufferbloat Related Projects

Congestion Control Blog
Lede Project (OpenWrt)
Flent Network Test Suite
Sqm-Scripts
The Cake shaper
AQMs in BSD
IETF AQM WG

Network Performance Related Resources


Jim Gettys' Blog - The chairman of the Fjord
Toke's Blog - Karlstad University's work on bloat
Voip Users Conference - Weekly Videoconference mostly about voip
Candelatech - A wifi testing company that "gets it".