Hi Dhruv,Thanks again for your for spending time to reply and share. As i see
in RFC 3261."A UAC MUST insert a Max-Forwards header field into each request it
originates with a value that SHOULD be 70." Here RFC says Max-Forwards value
should be 70 not Must be 70, so this is configurable and it depend on the
designer to decide this value incase if they choose wrongly (less value than
suggested) then they will bound to get 483 response so in that case, even i
also in RFC find nothing about this scenario so i thought let take help of you
peoplePlease let me know if anybody knows about this. Thanks in
advanceRegards,Bhanuprasad KSwww.globaledgesoft.com----- Original Message -----
From: Dhruv D
To: Bhanuprasad K S
Cc: [email protected]
Sent: Thursday, January 11, 2007 3:34 PM
Subject: Re: [Sip-implementors] open source server which supports AKA
registration
Hi Bhanu,
Intention behind the max-forward header is to find any loop in the flow.
mostly the value that is set in this header is fairly large ( 70 ) value so
that any loop can be detected. there is no text available in the rfc which
indicates the reaction for 483 response.
Consider following scenario:
UA can try upto the value of 255 in this header but practically this value is
fairly large value. So RFC recommends 70 that covers all kind of existing call
flows.
Regards,
~Dhruv
On 1/11/07, Bhanuprasad K S <[EMAIL PROTECTED]> wrote:
Hi Dhruv,
Thanks for the info,
The scenario is UAC has sent a request, after many routes request reached
proxy with Max-Forwards zero and at that time proxy checks the Max-Forwards
value since it is zero it rejects the request by sending 483 (Too Many Hops) to
UA which has sent that request, at this time how UA should behave to that error
response
a) shall UA has to send new request (say INVITE) with greater Max-Forwards
value or what it should do
Regards,
Bhanuprasad KS
www.globaledgesoft.com
----- Original Message -----
From: Dhruv D
To: Bhanuprasad K S
Cc: [email protected]
Sent: Thursday, January 11, 2007 2:24 PM
Subject: Re: [Sip-implementors] open source server which supports AKA
registration
If destined user receives the message with max-forwards as zero. It has
to honor the message. A proxy should check the value of max forwards before
forwarding it to next hop.
Piece of text from 3261:
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.
Regards,~Dhruv
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