comments on "draft-salam-l2vpn-evpn-oam-req-frmwk-02":

["Xialiang (Frank)" <[e-mail]>]

Hi authors,
I have reviewed this important draft, and have some comments as below:
1. By comparing with RFC6136 (L2VPN OAM req and frm), from the integrity point of view, I think there are some part missing: EVPN MEP and MIP, Discovery, Data Path Forwarding, Scalability, Transport/Application Independence;
2. In section 3.1.1.1, what is the definition of per user flow? Why is it different to support it between E-VPN Network OAM and E-VPN Service OAM?
3. In section 3.1.1.1, does the section of "a representative path" mean using test flow to detect the node failure? if yes, how to do? Is it a necessary requirement of proactive fault detection?
4. In section 3.2.1, I do not quite understand the describing reason for the inaccuracy of Loss Measurement. Do you mean that test packets of Loss Measurement are all BUM packets? Can you clarify why peer MEPs will receive some unnecessary packets? Why not use unicast packets for Loss Measurement?

Hoping for your feedback~~

B.R.
Frank