Subject: [mpls] Summary of the changes in 01 version of draft-ietf-mpls-tp-psc-itu

From: "Ryoo, Jeong-dong" <[email-masked]>
Date: Mon, 20 Jan 2014 01:34:25 +0000

Hi, all.

"draft-ietf-mpls-tp-psc-itu-01" is submitted, and this email is to give you the summary of the changes made in this version.
If you have any comments, please let us know.

Best regards,

Jeong-dong

### Summary of the changes ###
1. The title has been changed from “MPLS-TP Linear Protection in Support of ITU-T's Requirements” to “MPLS-TP Linear Protection to Match the Operational Expectations of SDH, OTN and Ethernet Transport Network Operators”. Accordingly, the phrase of “meet the ITU-T’s (protection) requirements” has been replaced in whole document. This change has been made to resolve the issue on the “ITU-T’s requirements” raised by many people.
2. The Abstract has been replaced with the new text (proposed by Adrian) after trimming off some text to meet the 20 line limitation. The text that has been trimmed appears in the Introduction section.
3. The Introduction section has been changed to reflect the Adrian’s proposed text and the feedbacks that Loa had been received from the people with different backgrounds.
4. In Section 7.3, the behavior of protection against SD (the issue raised by Yaacov) is rewritten to make sure that the SD protection is independent of the SD detection mechanism. The new text is the same as the one that I proposed in my previous email to the MPLS WG list on Jan. 14.
5. In Section 7.3, the 1:1 protection architecture for the selector bridge with packet duplication has been clarified to reflect the comment appeared in the WG list (from Qin Wu).
6. The descriptions on simultaneous requests (MS and SD) in Section 7.3 and equal priority resolution and in Section 7.4 are rewritten for better clarification, and the similar texts that have been appeared two different places are merged.
7. The exemplary Capabilities TLV sets in Section 9.1.3.3 are changed to follow the capability bit assignment correctly.
8. In Section 10.2, the operations of priority evaluation and state transition table lookup are clarified.
9, In Section 10.2, the description on the priorities of local inputs and remote requests is added for better clarification.
10. In Section 10.2, the operation of equal priority resolution is clarified.
11. In Section 10.2, the priority evaluation between local no request and remote no request is added to perform the state transition table lookup correctly.
12. Section 10.3 is newly added to describe the acceptance and retention of local inputs.
13. In Section 11, the state transition tables have been fixed for correct protocol operations.
14. In Section 11, a new transition (cell) is re-defined to guarantee interworking between revertive and non-revertive operations.
15. In Section 11, the footnotes for the state transition tables are divided and placed below the local table and the remote table separately.
16. The footnote texts for remote SD requests are modified to fix some bugs, and also to decouple the state transition table lookup from the priority evaluation for SD request.
17. Section 11.3 is newly added to define the state transition for 1+1 unidirectional protection.
18. Section 12 is newly added to describe the operations in cases of provisioning mismatch and protocol failures in the APS mode.
19. Section 14 (IANA considerations) is rewritten, and the editor’s note is replaced with the actual text for a new registry, “MPLS PSC Capability Flag Registry”.
20. Three operation examples of the APS mode are added in Appendix D.
21. Replaced “far-end/near-end” with “remote LER/local LER” in order to eliminate unnecessary confusion.
22. Other editorial changes for American English, correct spelling, and acronyms, etc.