Liaison statement
Reply to ITU-T SG12 LS - Harmonization of IP Capacity and Latency

State Posted
Submitted Date 2021-05-21
From Group ippm
From Contact Tommy Pauly
To Group ITU-T-SG-12
To Contacts Al Morton
CcScott Mansfield
Zaheduzzaman Sarker
IP Performance Measurement Discussion List
Tommy Pauly
Martin Duke
Ian Swett
Response Contact Tommy Pauly
Ian Swett
Purpose In response
Attachments (None)
Liaisons referred by this one Regarding the LEMONADE Profile
The IPPM Working Group in IETF thanks ITU-T SG12 for their liaison describing
progress on the Maximum IP-layer Capacity metric and methods in revised Rec.
Y.1540. The development of a coordinated specification has proceeded
successfully in IETF, with the benefit of the review by new experts
contributing at the working group and IESG level. The many lab and field test
results you shared have been a great asset, so we made references to your
results, as well as the testing conducted during Hackathons at recent IETF

The latest draft is available [0], which we expect to be approved shortly.

The next step appears to be development/enhancement of a test protocol to
support the measurement method with its feeback measurements and dynamic sender
rate control.

The IPPM Working Group continues to seek participation by all interested
parties, and will keep you informed of our progress on the topic of the Maximum
IP-layer Capacity metric and methods.


IPPM Chairs
Tommy Pauly (
Ian Swett (