Subject: [mpls] Comments on draft draft-cheng-mpls-inband-pm-encapsulation

From: Tarek Saad <[email-masked]>
Date: Mon, 22 Jul 2019 13:33:46 +0000

Hi authors,

>From reading your draft, have the following comments:

  *   There’s a similar proposal in draft-ietf-mpls-rfc6374-sfl that the WG has worked on to achieve similar PM measurements. That proposal did not require a special label, nor requires carrying 2 new additional labels in label stack. Do you see any downside to the approach in draft-ietf-mpls-rfc6374-sfl vs. the new one introduced one? If so, can this be highlighted.
  *   It appears that the label below the “Flow Indicator Label” is used to carry/embed context information: including a flow identifier and additional flags - that are set by ingress. Normally, MPLS labels do not embed any context information about the flow they carry within them. The context of the label is held by the node that allocates the label.

Regards,
Tarek