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Hi,

Thanks for the reply.

So now my understanding is this. Please correct me if I am wrong.

1) On SCTP association the two peer ends negociate and agree on the SCTP
streams that will be used by them.
2) Later on during Establishment of the D-channel from the ASP using
ESTABLISH_REQUEST message the ASP will specify 1 particular interface
identifier on a PARTICULAR Stream.
3) This is the stream that particular interface identifier will use all
through the existence of that D-channel.

If this is okay now I have a small query. Can multiple D-Channels be
Requested(using Establish_Request) on the same sctp stream. I think this
should be possible.

Best Regards,
Sundar.
sundarem AT future.futsoft.com


-----Original Message-----
From:
discussion-admin AT sctp.de

[mailto:discussion-admin AT sctp.de]On
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Message: 1
From:
hari AT cosystems.com
To:
<discussion AT sctp.de>
Date: Wed, 12 Dec 2001 17:42:06 +0530
Subject: [SCTP-Discussion] RE: discussion digest, Vol 1 #196 - 1 msg
Reply-To:
discussion AT sctp.de

Hello Sundar,
In case of IUA, Each interface Id related mesgs will travel on a specific
SCTP stream ID,
u need to build a table which co-relates the InterfaceId ----> SCTP Stream
ID. Once the SCTP_COMM_UP
mesg is recved from SCTP the IUA need to build this relationship table
according to the number of Streams
SCTP supported by the "SCTP association" between the SG and MGC.

Hari




-----Original Message-----
From:
discussion-admin AT sctp.de

[mailto:discussion-admin AT sctp.de]On
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discussion-request AT sctp.de
Sent: Wednesday, December 12, 2001 4:32 PM
To:
discussion AT sctp.de
Subject: discussion digest, Vol 1 #196 - 1 msg
Today's Topics:

1. Relationship between SCTP streams and D-Channel in IUA (Sundaresan M)

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Message: 1
From: "Sundaresan M"
<sundarem AT future.futsoft.com>
To:
<discussion AT sctp.de>
Date: Wed, 12 Dec 2001 15:14:53 +0530
boundary="----=_NextPart_000_0013_01C1831F.C0B692E0"
Subject: [SCTP-Discussion] Relationship between SCTP streams and D-Channel
in IUA
Reply-To:
discussion AT sctp.de

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BlankHi,

This is Sundar from Future Software. I am currently designing Testsuites for
IUA(RFC3057).

In Section 4.1.1 of RFC 3057, there is a statement as below:
4.1.1 Q.921 or Q.931 primitives procedures

On receiving these primitives from the local layer, the IUA layer

will send the corresponding QPTM message (Data, Unit Data, Establish,

Release) to its peer. While doing so, the IUA layer needs to fill

various fields of the common and specific headers correctly. In

addition the message needs to be sent on the SCTP stream that

corresponds to the D channel (Interface Identifier).

Now my question is what is the relationship between the D-channel and the
SCTP streams.

Best Regards,
Sundar.
I'm not here just to make a living, I'm here to make a difference !

********************
Sundaresan.M.G
Senior Software Engineer
SIGTRAN-TE, GNNettest
Future Software
Voice : 4330550 @ 328
********************

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• [SCTP-Discussion] SCTP streams and D-Channel in IUA, Sundaresan M, 12/13/2001
  • Re: [SCTP-Discussion] SCTP streams and D-Channel in IUA, Michael Mueller/bhu5nji, 12/13/2001

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