Re: M2PA: resynchronization of sequence numbers after PO
Dario <[email protected]>
| Newsgroups | gmane.ietf.sigtran |
|---|---|
| Message-ID | <[email protected]> |
Hi Brian, so if I understood correctly, the resinchronization takes place only when there is no PO on either side. it would be good to clarify that in RFC since statement in RFC4165, section 4.1.4 has not been clear to me: " Upon receiving the Link Status Processor Recovered message, the M2PA in RPO SHALL respond with a Link Status Ready message on the User Data stream." This is then coniditionaly true, only if there is no local PO on that M2PA side. Regarding second question, how many LS Ready messages are then exchanged? A side sends LS PR. B side sends LS PR. It seems to me that each side sending one LS Ready (stream 1) is sufficient to resynchronize the sequence numbers. Or is it 4 LS Ready messages (each side sending two LSR messages?). thanks! Best regards, Dario Brian F. G. Bidulock wrote: > > Dario, > > Dario wrote: (Tue, 20 Nov 2007 07:32:34) >> >> Hi, >> two more questions: >> 1. If both sides are in PO and one processor recovers and sends LS PR. >> Should the other side respond with >> LS Ready (stream 1) although it is locally in PO? > > No. Ala Q.703 it sends LS PR when it recovers and only then both > sides exchange LSR. Neither side resynchronizes until the link > becomes unblocks which requires no processor outage (local or remote). > >> 2. again, both sides are in PO and both sides recover - each side sends >> LS >> PR. Should both sides exchange just one pair of LS Ready (stream 1) >> messages >> or should they perform resynchronization sequence independently? > > Each side resynchronizes independently per Q.703. The sequence when the > last terminal recovers is the same as though only one processor was out. > > --brian > > -- > Brian F. G. Bidulock > [email protected] > http://www.openss7.org/ > > > _______________________________________________ > Sigtran mailing list > [email protected] > https://www1.ietf.org/mailman/listinfo/sigtran > > -- View this message in context: http://www.nabble.com/M2PA%3A-resynchronization-of-sequence-numbers-after-PO-tf4812071.html#a13875827 Sent from the IETF - Sigtran mailing list archive at Nabble.com.