[Bier] Request comments on draft-chen-pce-bier-10

chen.ran@zte.com.cn Tue, 28 February 2023 08:07 UTC

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Subject: [Bier] Request comments on draft-chen-pce-bier-10
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Hi Chairs and WG,


We have updated https://datatracker.ietf.org/doc/draft-chen-pce-bier/ based on the comments from IETF meeting. Any comments are welcome.



The current PCE-BIER related drafts are as follows:



https://datatracker.ietf.org/doc/draft-chen-pce-bier/:


This document specifies extensions to the Path Computation Element Protocol (PCEP) that allow a PCE to compute and initiate the path for


the BIER-TE. This draft mainly focuses on the path calculation of BIER-TE and The controller distributes a BIER-TE path to the BFIR


via protocol extensions like the PCEP [https://datatracker.ietf.org/doc/draft-chen-pce-bier/ ]  or BGP BIER-TE[https://datatracker.ietf.org/doc/draft-ietf-idr-bier-te-path/] .The two functions are used for the communication between controller and BFIR. 






https://datatracker.ietf.org/doc/draft-chen-pce-pcep-extension-pce-controller-bier/:


https://datatracker.ietf.org/doc/draft-chen-pce-controller-bier-te/:


These two drafts  focus on the  central controller scenario,specify a new mechanism where PCE allocates the BIER/BIER-TE information centrally and uses PCEP to distribute them to all nodes (include BFR, BFIR and BFER),  for example the BFR-ID allocation, the download of BIFT, then PCC generate a "Bit Index Forwarding Table"(BIFT). These functions are used for the situation which there is no IGP running in the BIER domain.


Of course, we can also directly distribute BIFT through the YANG model[see BIER YANG and BIER-TE YANG].






Since there are many southbound interface protocols, we would like to write an informational draft to introduce the relationship between these drafts and how to use.