Authors Presenter: Weiqiang Sun sunwq@{mit, sjtu}

Label Switched Path (LSP) Data Path Delay Metrics in Generalized MPLS/ MPLS-TE NetworksDraft-ietf-ccamp-dpm-01.txt Authors Presenter: Weiqiang Sun sunwq@{mit.edu, sjtu.edu.cn}

Background • This draft (the individual version) is a product of WGLC for the dppm draft (now RFC 5814) • Uses the same frame work as RFC 5814 • Accepted by CCAMP as a working group doc in May 2010 • Defines a series of metrics that complement RFC 5814, in the sense that CP and DP configurations may not be consistent.

Changes made from the -00 version • A couple of editorial changes • Technical changes • The percentile of Metric sub-section: changed to use RFC 5814 text • Two metrics are added

The metrics added • PSFD • Path Sent to Forward Data path becomes available • PSRD • Path Sent to Reverse Data path becomes available

Why do we add these metrics (I) • The previously defined metrics are intended to complement the DPPM draft • The DPPM metrics measures the CP delay • The -00 DPM metrics measures the diff of the actual implementation against ideal values • If one implementation is not conformant with RSVP-TE specs, both measurements are necessary if one need ``real’’ signaling performance

Why do we add these metrics (II) • The newly added metrics provide “one-stop” results • Can measure actual signaling performance • Will this render the DPPM doc useless? • The answer is no! • DPPM metrics are easy to obtain, and • for many cases it is sufficient according to our experience • To us, the DPM draft is still a complement to RFC 5814, even after adding the metrics

Next steps • We are open for any comments/suggestions • Will revise the draft according feedbacks from the WG • Hope WGLC can be done early next year

Thank you! Weiqiang Sun sunwq@mit.edu

Metrics defined in the -00 version • RRFD: the delay from RESV Received to Forward data path becomes available • RSRD: the delay from RESV Sent to Reversed data path becomes available • PRFD: the delay from PATH Received to Forward data path becomes available

Authors Presenter: Weiqiang Sun sunwq@{mit, sjtu}