Hi Dale, Sorry for my late reply! That's right! The possibility you mention is described in draft-mizrahi-ippm-compact-alternate-marking. In the next version we can update the document with a new section about the multiplexing marking alternative that is certainly preferred if only 1 bit can be used.
Best Regards, Giuseppe -----Messaggio originale----- Da: Dale R. Worley [mailto:[email protected]] Inviato: domenica 4 marzo 2018 16:45 A: Fioccola Giuseppe Cc: [email protected]; [email protected] Oggetto: Re: [nvo3] I: New Version Notification for draft-fmm-nvo3-pm-alt-mark-01.txt Fioccola Giuseppe <[email protected]> writes: > We have refreshed this draft on Alternate Marking application in NVO3 > and updated the reference to RFC8321. I was reading somewhere (and it must have ultimately been linked from NVO3) of a scheme that provided the benefits of two-bit marking, but used only one bit. The concept was that in the middle of each block of packets with a single value of the L bit, a single packet has the bit inverted: 0 0 0 0 0 1 0 0 0 0 0 1 1 1 1 1 0 1 1 1 1 1 0 0 0 0 0 1 0 0 0 0 0 1 1 ... The idea being that examining the stream of packets, as long as the loss rate is low, the packets with the inverted bit can be identified because all of the nearby packets have the opposite L value, and the observed L bit values decomposed into the effective L and D bits: Lobs: 0 0 0 0 0 1 0 0 0 0 0 1 1 1 1 1 0 1 1 1 1 1 0 0 0 0 0 1 0 0 0 0 0 1 1 ... Leff: 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 1 ... Deff: 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 ... >From there, processing works as in two-bit marking. If this works in practice, it would be advantageous because it requires only one bit from each packet, and such bits are always in short supply. In the case of Geneve, there are 6 bits currently reserved, and it would be helpful if PM marking only consumed 16% of them. Dale Questo messaggio e i suoi allegati sono indirizzati esclusivamente alle persone indicate. La diffusione, copia o qualsiasi altra azione derivante dalla conoscenza di queste informazioni sono rigorosamente vietate. Qualora abbiate ricevuto questo documento per errore siete cortesemente pregati di darne immediata comunicazione al mittente e di provvedere alla sua distruzione, Grazie. This e-mail and any attachments is confidential and may contain privileged information intended for the addressee(s) only. Dissemination, copying, printing or use by anybody else is unauthorised. If you are not the intended recipient, please delete this message and any attachments and advise the sender by return e-mail, Thanks. Rispetta l'ambiente. Non stampare questa mail se non รจ necessario. _______________________________________________ nvo3 mailing list [email protected] https://www.ietf.org/mailman/listinfo/nvo3
