Re: Can SGP send ASPDN or ASPUP messages?

Hello Brian,
    I am confused to your reply, according to RFC 4666, it says ASP Down
ACK is used to reply a ASP Down message,
Would you like to give more explaination to this?

Best regards,
Zhou Minggang

-----Original Message-----
From: Brian F. G. Bidulock [mailto:[email protected]] 
Sent: Tuesday, January 29, 2008 9:13 AM
To: Christopher Benson
Cc: [email protected]; Shmelev Kirill
Subject: Re: [Sigtran] Can SGP send ASPDN or ASPUP messages?

Christopher,

The SGP may also send unsolicited ASP Down Ack, which is quicker than
many ASP Inactive Acks.

--brian

Christopher Benson wrote:              (Mon, 28 Jan 2008 13:29:56)
> Hi Shmelev,
> 
> A procedure that has been used in M3UA is that the SGP will send an 
> ASP-Inactive-Ack without receiving an ASP Inactive message first. I 
> believe this has the same eventual result that you desire.
> 
> ASP Inactive and ASP Down messages *FROM* an SGP, are not recognized 
> message types in that direction, and so cannot and should not be used.
> 
> With thanks, from Chris Benson.
> 
> On Thu, 17 Jan 2008, Shmelev Kirill wrote:
> 
> >>  Date: Thu, 17 Jan 2008 00:25:28 -0800 (PST)
> >>  From: Shmelev Kirill <[email protected]>
> >>  To: [email protected]
> >>  Subject: [Sigtran] Can SGP send ASPDN or ASPUP messages?
> >>  
> >>  
> >>  Hi, experts!
> >>  
> >>  Can SGP (or server in broader meaning) ever send ASPDN message? 
> >> Sometimes it  is more preferrable than closing SCTP association, 
> >> since the connection will  not be closed until ASPDN_ACK is 
> >> received
> >>  --
> >>  View this message in context: 
> >> http://www.nabble.com/Can-SGP-send-ASPDN-or-ASPUP-messages--tp14914
> >> 300p14914300.html  Sent from the IETF - Sigtran mailing list 
> >> archive at Nabble.com.
> >>  
> >>  
> >>  
> >>  _______________________________________________
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> >>  
> 
> 
> 
> 
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--
Brian F. G. Bidulock
[email protected]
http://www.openss7.org/


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