RE: [Ietf-behave] UDP binding timeouts
> I think the most important thing is that there is a deterministic
> minimum that you can count on; the actual value is far less important.
>
> In principal, you'd like to tie the timeout to typical maximum activity
> intervals for UDP-based applications. That is, normal outbound packet
> activity for applications should keep the bindings active withot
> requiring additional keepalives. For RTP, even a much smaller number
> would typically suffice. For SIP over UDP, packet retransmits can be
> spaced as large as 16s towards the tail end of the transaction. If you
> want the binding to be active for a transaction lifetime without special
> keepalives, you'd want a minimum of 20s or so.
With such short binding lifetimes, wouldn't you need SIP keepalives
(<CR><LF>.<CR><LF>) to keep the binding open so you can be signaled
for an incoming call?
That's a lot of silly keepalive traffic for a SIP proxy.
> It'd be interesting to look at other UDP based protocols and see what
> timeouts would be appropriate. Of course, who knows what future apps
> would do. Again, the key thing is really determinism.
I agree.
-d
> -Jonathan R.
>
> Cullen Jennings wrote:
>
> > Medhavi raises a good point, how long should the binding times
> be and more
> > importantly, any particular reason why?
> >
> > Lacking any other good reason, we will likely pick times that
> are consistent
> > with what devices do today only because these somewhat match
> what customers
> > seem comfortable with.
> >
> >
> > On 8/10/04 7:53 AM, "Medhavi Bhatia" <mbhatia@xxxxxxxxxxx> wrote:
> >
> >
> >>Some comments/questions:
> >>
> >>1. REQ-3 comes up with a min-timeout of 2 minutes for UDP
> dynamic bindings. Is
> >>there data somewhere on the internet which can back this up ?
> >
> > .. snip...
> >
> >>Medhavi Bhatia
> >>Chief Architect
> >>
> >>NexTone Communications
> >>****Pioneering Global Communications with Excellence, Integrity
> and Flawless
> >>Execution****
> >>
> >
> >
> >
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>
> --
> Jonathan D. Rosenberg, Ph.D. 600 Lanidex Plaza
> Chief Technology Officer Parsippany, NJ 07054-2711
> dynamicsoft
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