Hi all, I concur with Stewart. >From my POV, it would be nice if the tables in Section 8 of >draft-ietf-rtgwg-segment-routing-ti-lfa were aligned with those in Section 9 >of RFC 7490, This would facilitate meaningful comparison between the two sets of networks.
One of the differences between RFC 7490 and what the TI-LFA draft calls "repair with 1 SID" is that the former restricts computation of the PQ nodes to just one per failed link ("the Q-space of E with respect to link S-E is used as a proxy for the Q-space of each destination" the latter leaves it "be up to each implementation to determine the good tradeoff between scaling and accuracy of the optimization". It would be nice if the authors could indicate whether per destination computation of PQ nodes has been used in the analysis each specific network or not. My 2c, Sasha Office: +972-39266302 Cell: +972-549266302 Email: alexander.vainsht...@ecitele.com -----Original Message----- From: rtgwg <rtgwg-boun...@ietf.org> On Behalf Of Stewart Bryant Sent: Monday, July 22, 2019 7:00 PM To: rtgwg@ietf.org; draft-ietf-rtgwg-segment-routing-ti-...@ietf.org Subject: draft-ietf-rtgwg-segment-routing-ti-lfa Table 1 questions I would like to understand what Table 1 in draft-ietf-rtgwg-segment-routing-ti-lfa is telling us. It uses the terms links and circuits without distinguishing between the two. I could speculate that a circuit is a group of links, but then the ratio of nodes to circuits in T1 seems far too low at less than 1:1 in network T1. Then the node to link ratio sounds quite high with fan outs of 84:1 in T2. Please could you explain what you mean by circuits and links in this table. What I would like to know is the average ratio of nodes to neighbours, and the number of parallel links per neighbour. Best regards Stewart _______________________________________________ rtgwg mailing list rtgwg@ietf.org https://clicktime.symantec.com/3NcFJb3zFzZsCG7Sv5AxXRB6H2?u=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2Frtgwg ___________________________________________________________________________ This e-mail message is intended for the recipient only and contains information which is CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have received this transmission in error, please inform us by e-mail, phone or fax, and then delete the original and all copies thereof. ___________________________________________________________________________ _______________________________________________ rtgwg mailing list rtgwg@ietf.org https://www.ietf.org/mailman/listinfo/rtgwg