Hi Pranab, 8.1.1.6 Max-Forwards
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. A UAC MUST insert a Max-Forwards header field into each request it originates with a value that SHOULD be 70. This number was chosen to be sufficiently large to guarantee that a request would not be dropped in any SIP network when there were no loops, but not so large as to consume proxy resources when a loop does occur. Lower values should be used with caution and only in networks where topologies are known by the UA. If you get Max-Forwards as zero at your destination, then you *may* still entertain accepting the call. But if you are proxy, you can reject with 483 response. Regards, Somesh -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of ext pranab sahoo Sent: Friday, May 25, 2012 4:27 PM To: sip-implementors Subject: [Sip-implementors] Need Help Hi all, Thanks for providing a forum for healthy disscussion on SIP. I have an issue regarding MAX FORWARD Invite Max Forward=0 A--------------------------------->B There is another user C. Actually my scenario is a call forwarding case,in which B going to forward the call. 302 contact:c server<-------------------------------B Is max forward=0 has any role to discard the call and send error response to A.Or it will be as a normal call. waiting for your reply. Thanks in advance. pranab Brazil _______________________________________________ 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
