1. Geoff Hunt Alan Clark Glen Zorn Qin Wu
RTCP XR Report Block for Discard metric Reporting draft-ietf-xrblock-rtcp-xr-discard-05
Geoff Hunt
Alan Clark
Glen Zorn
Qin Wu
2019/2/24
XRBLOCK IETF 84 Vancouver

2. XRBLOCK IETF 84 Vancouver
Document Status
Version (-02) has got sufficient and dense review by Kevin Gross and Varun Singh after Paris meeting
Version (-03) as basis Enter into WGLC in June 11 together with Discard RLE draft
Two updates (-04) (-05) were issued to address the comments during WGLC.
Reordering the discard type
Clarify how to report combination of 3 discard types
Many thanks to the reviewers
Varun Singh, Alan Clark, Shida Schubert, Romascanu, Dan
Claire Bi(jiayu)
This draft support reporting the number of packets discards in four cases
Underflow in one report interval
Overflow in one report interval
Both underflow and overflow in one interval
Duplication packets discards
One open issue remains.
2019/2/24
XRBLOCK IETF 84 Vancouver

3. Issue # Duplication Packets discards
It is agreed that the packet discarded due to duplication is regarded as one discard type.
The consensus is to report duplication packets discard separately.
The current draft allocate DT =0 to this discard type.
Alan proposed on the list to add some background to explain the cause of duplication packets discards.
Proposal:
Add one statement at the end of the definition of Discard Type as follows:
Note that duplicating RTP packets using RTP replication may lead to breakage of RTP media streams or RTCP rules. In order not to disrupt all the RTCP statistics, it is recommended to duplicate RTP packets as described in draft-ietf-avtext-rtp-duplication-00 which will not cause breakage.
Put draft-ietf-avtext-rtp-duplication-00 as informative reference.
XRBLOCK IETF 84 Vancouver
2019/2/24

4. XRBLOCK IETF 84 Vancouver
Follow Up
Address the open issue by issuing new version.
One more WGLC?
2019/2/24
XRBLOCK IETF 84 Vancouver