Re: Sigtran Digest, Vol 38, Issue 4

Hi, Minggang:
    Thanks for your reply.
    I will use the rfc4666 to have a deep looking.
    From your comment, DE mode
    IPSP A                IPSP B
    ASPUP--------------->
                <--------------ASPUP ASK
    ASPAC---------------->
                <---------------ASPAC ACK
   after the message exchange,IPSP B will consider the IPSP A is ready to
receive DATA and it's active for some
  AS.
   But IPSP A will treat IPSP B as down?there will be 1 direction message
flow?

br
muare


On 6/5/07, [email protected] <[email protected]> wrote:
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>   1. RE: [SIGTRAN]Difference between IPSP DE and SE mode
>      (ZHOU Minggang)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 4 Jun 2007 09:35:13 +0800
> From: "ZHOU Minggang" <[email protected]>
> Subject: RE: [SIGTRAN]Difference between IPSP DE and SE mode
> To: =?gb2312?B?0Lux3w==?= <[email protected]>, <[email protected]>
> Message-ID:
>        <[email protected]>
> Content-Type: text/plain; charset="gb2312"
>
> Hello muare,
>    As per rfc4666(rfc3332 is obsolete) said,:
>    When using DE mode, the management of the connection in the two
> directions is considered independent, it could happen that only one of the
> two directions is activated or closed, while the other remains in the same
> state as it was.
>    When using SE mode, only the activation phase (ASPTM) is independent
> for each of the two directions. In this case, it could happen that the
> sending of the ASPSM from IPSP-A to IPSP-B could have an effect in the whole
> communication.
>
> Therefore, if you want to  two side independent, you should use DE mode.
>
> Best regards,
> Zhou Minggang
>
>
> _____
>
> From: л±ß [mailto:[email protected]]
> Sent: Thursday, May 31, 2007 11:46 PM
> To: [email protected]
> Subject: [SIGTRAN]Difference between IPSP DE and SE mode
>
>
> Hello All:
>        Although RFC3332 Docs tell us the basic Message Flow for IPSP DE.
> But there is not enough info about belows:
>       1) under which situation,the IPSP DE will be used other than SE
> mode.
>       2) Or,the different advantage for DE and SE
>
>
> Thanks
> muare
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