[ABN} Merged request is nothing to do with looping... This scenario would arise @ UAS, if the forked request reach the particular user through different set of downstream proxies....
Thanks & Regards, Nataraju A.B. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, November 10, 2005 5:59 PM To: [EMAIL PROTECTED]; [email protected] Subject: RE: [Sip-implementors] RE: Loop detection in SIP Thanks a lot!! What is Merge request...Is it to do with Looping again?? ________________________________ From: Ajit Kumar [mailto:[EMAIL PROTECTED] Sent: Thu 11/10/2005 4:51 PM To: Naveen Kak (WT01 - Voice & Next Generation Networks); [email protected] Subject: RE: [Sip-implementors] RE: Loop detection in SIP Branch parameter placed in the via has two parts in which the second part is used for loop detection, this part is calculated by hashing various headers of the request, now if the request is getting looped than this part of the branch parameter calculated by the proxy will match the corresponding part of the branch parameter already placed in the one of the via field but if it is spiraling than the one calculated and the one already in the via header will be different. The basic thing is that in looping the routing information ( i.e. the headers used to calculate the second part of branch parameter) don't change, while in spiraling one or more of these header fields changes changing the hash value. Regards Ajit -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, November 10, 2005 3:40 PM To: [email protected] Subject: [Sip-implementors] RE: Loop detection in SIP Hi Guys, Request a response ASAP. Thanks in Advance Naveen ________________________________ From: Naveen Kak (WT01 - Voice & Next Generation Networks) Sent: Thu 11/10/2005 3:33 PM To: [email protected] Subject: Loop detection in SIP ________________________________ Hi, Can anybody expain me how looping is detected by the Proxy. I know that if the proxy finds its address in the Via header, it means it has forwarded the request before. But then how branch ID is used to detremine that its a loop or spiral(The RFC says it does a hashing of the Branch Id and also that of the Request URI and compares both). Could somebody simplify this for me( how excatly is branch ID is used in this context). Thanks Naveen Confidentiality Notice The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain confidential or privileged information. If you are not the intended recipient, please notify the sender at Wipro or [EMAIL PROTECTED] immediately and destroy all copies of this message and any attachments. _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors Confidentiality Notice The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain confidential or privileged information. If you are not the intended recipient, please notify the sender at Wipro or [EMAIL PROTECTED] immediately and destroy all copies of this message and any attachments. _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
