Please find my comments inline...
On Sat, Mar 10, 2012 at 5:53 PM, manju nath <[email protected]> wrote:
> Hi all,
>
> I have doubt regarding the value of Max-forwards header, the doubt
> is
>
> what should be the behaviour of UAS if it receives an INVITE req with
> Max-Forwards value greater the 255??
>
[ABN] It is syntactically correct request...
So no need to reject the request....
It is a MUST requirement to insert the Max-Forwards header, but
SHOULD requirement to have a value less than or equal to 70.
It is preferred that the Max-Forwards value is less than or equal to 70. By
default this value is set to 70. This value can be reduced, if the network
topology is clearly understood.
</3261>
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.
</3261>
>
> does it has to reject the req it by 483 or 400???
> plz reply it helps me alot , Thanks in advace... :)
>
> --
> *Thanks & Regards,*
> *Manjunath.jootoor.*
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> [email protected]
> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
>
--
Thanks,
Nataraju A.B.
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