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?

• Sebastian Moeller says in https://lists.bufferbloat.net/pipermail/cerowrt-devel/2014-January/001953.html
• Not simple (response to original note) maybe use 44 bytes?
  

• Discussion of names

• Sebastian Moeller at https://lists.bufferbloat.net/pipermail/cerowrt-devel/2014-January/001963.html

• Details all the complexities of DSL links to the internet