RE: SUA: Regarding AS Pending Buffer Handling when Tt(r) expires

Santhanakrishnan,

I agree that there seems to be a contradiction here. Sounds like a candidate for the IG ...

Barry Nagelberg
Adax, Inc.

-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of santhanakrishnan
Sent: Wednesday, February 08, 2006 9:10 AM
To: [email protected]
Subject: [SIGTRAN] SUA: Regarding AS Pending Buffer Handling when Tt(r) expires


Hello all,

In RFC 3868 the sections 1.5.1 and 4.3.2 looks like contradicting for the Handling of buffered messages at SGP for an AS
when Tt(r) timer (Pending timer) expires.

Sec 1.5.1 Says:  The SGP will buffer the message destined for this AS for a time Tt(r) or until an ASP becomes
available. When no ASP becomes available before expiry of Tt(r), the SGP will flush the buffered messages and initiate
the appropriate return or refusal procedures.

            This means that when AS moves from Pending to Inactive/Down after Tt(r) expiry, then the buffered messages
are HANDLED. Appropriate return, refusal procedures are initiated.

Section 4.3.2 Says:  If T(r) expires before an ASP becomes ASP-ACTIVE, and the SGP has no other alternative, the SGP may
stop queuing messages and discard all previously queued messages. The AS will move to the AS-INACTIVE state if at least
one ASP is in ASP-INACTIVE state, otherwise it will move to AS-DOWN state.

            This means that when AS moves from Pending to Inactive/Down after Tt(r) expiry, then the buffered messages
at SGP may be DISCARDED.

Which of these should be followed as per the RFC? Does the RFC enforce on any of these statements?

regards,
-Santhanakrishnan