The approach suggested by Robert Sparks solves the problem but creates an un-necessary hop when the sender knows for sure that it going to be dropped by the Receiver (since it is sending with mf=0).
Kasturi -----Original Message----- From: Song, Youngsun [mailto:[EMAIL PROTECTED] Sent: Monday, November 13, 2006 9:22 AM To: [email protected] Subject: [Sip-implementors] FW: Query on max-forwards counts Hi, Please see the attached response from Robert Sparks regarding this query. (FYI, I had also sent him a separate email...) Per his response, Proxy-B should forward the request to UA-B. Thanks to all who has taken the time to respond to my query, YoungSun > -----Original Message----- > From: Robert Sparks [mailto:[EMAIL PROTECTED] > Sent: Monday, November 13, 2006 9:12 AM > To: Song, Youngsun > Subject: Re: [Sip-implementors] Query on max-forwards counts > > See page 95, item 3. > > You reject when you receive, not before you send. > You reject when you receive a max-forwards of 0, not when you > receive a max-forwards of 1. > > RjS > > > >> -----Original Message----- > >> From: [EMAIL PROTECTED] > >> [mailto:[EMAIL PROTECTED] On > Behalf Of Song, > >> Youngsun > >> Sent: Friday, November 10, 2006 11:19 AM > >> To: [email protected] > >> Subject: [Sip-implementors] Query on max-forwards counts > >> > >> Hi, > >> > >> I have a clarification question on the following statement > in Section > >> 8.1.1.6 of RFC3261 regarding when a proxy should send a 483 and > >> whether the number of hops includes the destination hop. > >> > >> "The Max-Forwards header field serves to limit the number > of hops a > >> request can transit on the way to its destination. It > consists of an > >> integer that is decremented by one at each hop. If the > Max-Forwards > >> value reaches 0 before the request reaches its > destination, it will > >> be rejected with a 483(Too Many Hops) error response." > >> > >> > >> Consider the following flow: (mf=max-forwards) > >> > >> > >> UA-A --- INVITE (mf=2) ---> Proxy-A ---- INVITE (mf=1) > ---> Proxy-B > >> ---- INVITE (mf=0) ---> UA-B > >> > >> > >> In the flow above, should Proxy-B forward the INVITE with > >> max-forwards=0 to UA-B or should it reject the request with 483? > >> > >> Thanks for your help in advance, > >> YoungSun > >> > >> _______________________________________________ > >> Sip-implementors mailing list > >> [email protected] > >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > >> > > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
