Hi Yifan Wang, thank you for the clarification on the packet loss measurement. I agree that TWAMP/TWAMP-Lite could be used to measure packet loss using synthetic packets. I would note that STAMP (RFC 8762 <https://datatracker.ietf.org/doc/rfc8762/>) has all the functionality of TWAMP. Also, the Direct measurement extension of STAMP (RFC 8972 <https://datatracker.ietf.org/doc/rfc8972/>) can measure data traffic loss using operator-defined "in-profile" characteristics of the monitored flow.
Regards, Greg On Mon, Nov 6, 2023 at 1:08 PM wangyifan (AI) <wangyifan82= [email protected]> wrote: > Hi, > > Thanks for the comments. > > > > In the afternoon presentation I mainly introduce the path computation > method based on link loss. > > > > Here are the consideration of how packet loss on a link is measured: > > > > 1. The packet loss rate is measured based on the TWAMP or TWAMP > LIGHT. It doesn’t depend on the real traffic. > > 2. The TWAMP session can be deployed to measure the packet loss rate > before the flexible algorithm is configured. Consequently the packet loss > caused by real traffic tests can be prevented. > > 3. The measured packet loss rate can be suppressed to prevent > frequent traffic switching caused by link loss changes. > > > > Regards, > > Yifan Wang. > > > > *发件人:* Lsr <[email protected]> *代表 *Alexander Vainshtein > *发送时间:* 2023年11月6日 18:15 > *收件人:* [email protected] > *抄送:* [email protected]; Nitsan Dolev <[email protected]> > *主题:* [Lsr] My comment on > https://datatracker.ietf.org/doc/html/draft-wang-lsr-flex-algo-link-loss-00 > > > > Hi, > > Just repeating my comment at the mike: > > > > The draft does not explain how packet loss on a link is measured. > > > > If this measurement is based on real traffic, excluding the link from the > topology for certain flexible algorithms may result in the packet loss > going down and the link becoming eligible for traffic again. > > > > For this scheme to work, link loss measurement should be done in a way > that does not depend on the amount of customer traffic crossing the link. > > > > I also think that, even with such a scheme, some kind of hysteresis > mechanism is required to prevent link being frequently excluded and > admitted back if the packet loss rate fluctuates around the threshold level, > > > > > > My 2c, > > Sasha > > > > > > *Disclaimer* > > This e-mail together with any attachments may contain information of > Ribbon Communications Inc. and its Affiliates that is confidential and/or > proprietary for the sole use of the intended recipient. Any review, > disclosure, reliance or distribution by others or forwarding without > express permission is strictly prohibited. If you are not the intended > recipient, please notify the sender immediately and then delete all copies, > including any attachments. > _______________________________________________ > Lsr mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/lsr >
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