Re: [conex] WGLC for draft-ietf-conex-abstract-mech-06.txt

Ingemar Johansson S <ingemar.s.johansson@ericsson.com> Wed, 21 November 2012 13:28 UTC

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From: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
To: "conex@ietf.org" <conex@ietf.org>
Thread-Topic: [conex] WGLC for draft-ietf-conex-abstract-mech-06.txt
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Date: Wed, 21 Nov 2012 13:27:48 +0000
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Cc: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
Subject: Re: [conex] WGLC for draft-ietf-conex-abstract-mech-06.txt
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Hi

First time I had time to read carefully through this document
The document is comprehensible and I don't find any serious issues with it.

One comment though on page 5, 3rd para.
" the flow-state required for audit creates itself as it detects new flows.  Therefore a flow will not fail if it is re-
   routed away from the audit box currently holding its flow-state. "

If I map ConEx to a 3GPP LTE use case, the audit functions are best placed in the eNodeB. When a new (long lived) flow is created it is preferably preloaded with credit marks which are stored in the auditor in the eNodeB which the terminal is "connected" to. When the terminal hands over to another eNodeB the credit marks will be lost.  This means that the ConEx markings will in this case be at least one RTT behind with a higher risk of false positives in the auditor in the new eNodeB
To avoid this the credit marks would need to be forwarded to the new eNodeB via e.g the X2 interface.

So my question is, is it needed to add a statement that mentions this ?

/Ingemar

-----Original Message-----
From: conex-bounces@ietf.org [mailto:conex-bounces@ietf.org] On Behalf Of marcelo bagnulo braun
Sent: 23 October 2012 06:54
To: 'ConEx IETF list'
Subject: [conex] WGLC for draft-ietf-conex-abstract-mech-06.txt

Hi,

This note issues the WGLC for

draft-ietf-conex-abstract-mech-06.txt

Please reivew the document and provide comments. The WGLC will close on the 20th of november.

For you convenience, the draft can be found at:

https://datatracker.ietf.org/doc/draft-ietf-conex-abstract-mech

Regards, marcelo

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