Hi Prithvi, The passage you quote states that, 'all of these header fields are mandatory in all SIP requests'. That is, not all SIP messages, only requests. They are not necessarily mandatory for responses (although some are). Tables 2 & 3 (pages 162 & 163 RFC 3261) shows that Max-Forwards is only relevant for requests.
Regards Steve -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Prithvi Sent: 02 March 2007 05:43 To: Satyendra Tiwari Cc: [email protected] Subject: Re: [Sip-implementors] Max-Forward Header Hi Satya Maxforward is mandatory in all SIP messages see 8.1.1 for more info 8.1.1 Generating the Request A valid SIP request formulated by a UAC MUST, at a minimum, contain the following header fields: To, From, CSeq, Call-ID, Max-Forwards, and Via; all of these header fields are mandatory in all SIP requests. These six header fields are the fundamental building blocks of a SIP message, as they jointly provide for most of the critical message routing services including the addressing of messages, the routing of responses, limiting message propagation, ordering of messages, and the unique identification of transactions. These header fields are in addition to the mandatory request line, which contains the method, Request-URI, and SIP version. Regards Prithvi Satyendra Tiwari wrote: > Hello, > > Is Max-Forward header mandatory in SIP responces? > If optional then why? > > > > > > Thanks And Regards, > Satyendra Tiwari > Alcatel-Lucent > _______________________________________________ > 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
