Re: RFC 2960 : #14. Suggested SCTP Protocol Parameter Values

Hi Michael, Brian,

The timers like e.g. RTO.min/max are SCTP timers. As you said addition to
the SCTP I have to ajust parameters in the upper layer. My problem occurs in
the M3UA protocol.
- Are beside the SCTP timers parameters (ETSI TS 102 144) also M3UA
ajustable parameters.
- What is the ETSI/ITU/IETF # standard where I can find these timers or way
to set these timers.
- Do you know the mean value Telco's worldwide used for  RTO.min/max.

Thanks,
Robby Pocornie

2006/10/18, Robby Pocornie <[email protected]>:
>
>
>
> ---------- Forwarded message ----------
> From: Michael Tuexen <[email protected]
> [email protected]>
> Date: 17-okt-2006 21:26
> Subject: Re: [Sigtran] RFC 2960 : #14. Suggested SCTP Protocol Parameter
> Values
> To: Robby Pocornie <[email protected]>
> Cc:
>
> Hi Robby,
>
> these values are given for the usage of SCTP as a general transport
> protocol
> in the public Internet. You most likely want to use different values
> when you use
> SCTP for SIGTRAN in a private network. That is why the ETSI spec for
> SCTP requires
> SCTP implementations to provide a set of configurable parameters
> requires values
> from the  minimum, maximum and granulary. From an interoperability
> point if view
> the delayed SACK timer and the RTO values of the peer are related.
>
> In addition to the SCTP layer you need to adjust the SCTP parameters
> to the parameters
> in the upper layer, like M2PA for example. But this is not an SCTP
> issue...
>
> Best regards
> Michael
>
> On Oct 17, 2006, at 3:46 PM, Robby Pocornie wrote:
>
> > Dear All,
> >
> > In RFC 2960, October 2000 the Retransmission timers are difined in
> > chapter 14 as:
> >
> > Suggested SCTP Protocol Parameter Values
> >    The following protocol parameters are RECOMMENDED:
> >    RTO.Initial              - 3  seconds
> >    RTO.Min                   - 1  second
> >    RTO.Max                 -  60 seconds
> > ........etc..
> > My question is: are these values not ridiculously too large for
> > today Signalling enviroment.
> > Is RTO.Min of 1 second not too large. I think 120 msec / 200 msec
> > would be enough.
> >
> > Can you tell me if someone also has occur poblems with interworking
> > where one Vender has 1000 msec and the other 200msec
> > and how do I can solve those problems.
> >
> > Within ITU specs you find Bileteral agreements for this kind of
> > issue's. In IETF RFC I still not find this kind of agreement
> > mention
> >
> > Regards,
> > Robby Pocornie
> > [email protected]
> >
> >
> > _______________________________________________
> > Sigtran mailing list
> > [email protected]
> > https://www1.ietf.org/mailman/listinfo/sigtran
>
>

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