Re: [Sigtran] [M3UA] IPSP receiving ASP ACTIVE Ack

[Ankit Kumar Sharma <ankisharma at gmail.com>]

Krishnan,

  As per section 3.7.2 of RFC 4666:

     "The ASP Active Ack message is used to acknowledge an ASP Active message received from a remote M3UA peer"

So, I am not sure in which case peer would send a ASP-Active-Ack without receiving an ASP-Active message.

ASP Active message is sent to remote peer with the intention that our node is now ready to handle traffic for a particular AS. Now if we change our ASP state to ASP Active after receiving an unknown ASP-Active-Ack message, it could result in data loss because our node may not be ready to receive traffic for that particular AS.

Regards,

Ankit Kumar Sharma

On Fri, Jul 10, 2009 at 10:14 AM, Santhana <santhana at huawei.com> wrote:

Hi Brian

      The second sentence(quoted) in this para. I broke the two sentences before interpretation as the first sentence describes IPSP and the second sentence describes ASP.

 

It is from M3UA RFC 4666 In section 4.3.4.3.1

        Either of the IPSPs can initiate communication.  When an IPSP

   receives an ASP Active, it should mark the peer as ASP-ACTIVE and

   return an ASP Active Ack message.  ”An ASP receiving an ASP Active Ack

   message may mark the peer as ASP-Active, if it is not already in the

   ASP-ACTIVE state.”

 

My Question applies for an ASP(and inturn IPSP) receiving an ACTIVE ACK.

 

Regards

Santhanakrishnan

 

-----Original Message-----
From: Brian F. G. Bidulock [mailto:bidulock at openss7.org]
Sent: Thursday, July 09, 2009 6:00 PM
To: Santhana
Cc: sigtran at ietf.org
Subject: Re: [Sigtran] [M3UA] IPSP receiving ASP ACTIVE Ack

 

Santhana,

 

Santhana wrote:                            (Thu, 09 Jul 2009 17:09:25)

>                The M3UA RFC says when an IPSP(in INACTIVE STATE) receives

>    an ASP ACTIVE Ack, it has to change the state to ACTIVE. Is this

>    applicable even when the IPSP has not sent the ASP ACTIVE before also.

 

Where does it say that?

 

--brian

 

--

Brian F. G. Bidulock

bidulock at openss7.org

http://www.openss7.org/

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