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

2. 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.

3. 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

4. The metrics added PSFD – Path Sent to Forward Data path becomes available PSRD – Path Sent to Reverse Data path becomes available

5. 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

6. 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

7. 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

8. Thank you! Weiqiang Sun sunwq@mit.edu

9. 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