Re: [M3UA] Receving ASP ACTIVE in DOWN State

Hi Santhana
 
 
In case if we receive ASP-ACTIVE in ASP-DOWN state, we must discard the
message and may send Unexpected Message Error to the peer. Here is what
RFC says about unexpected messages.
 
"The "Unexpected Message" error MAY be sent if a defined and recognized
message is received that is not expected in the current state (in some
cases the ASP may optionally silently discard the message and not send
an Error message)." 
 
And in your case that is what exactly is happening, a defined and
recognized ASP-ACTIVE message is being received in ASP-DOWN state, which
is not expected in DOWN state. In case of ASP-DOWN only expected
messages are HeartBeat, ASP-DOWN Ack and Error messages.
 
Hope it clarifies your doubt.
 
 
Thanks
aamir
 
 
 
 

________________________________

From: [email protected] [mailto:[email protected]] On
Behalf Of Santhana
Sent: Monday, July 06, 2009 11:45 AM
To: [email protected]
Subject: [Sigtran] [M3UA] Receving ASP ACTIVE in DOWN State



Hi Brian

            When an ASP is in DOWN state and if it receives ASP ACTIVE
message which of the following is most suggested handling, as the RFC
does not tell anything specific regarding this(I searched enough in
RFC).

 

1)       Sending a DOWN ACK message

2)       Sending an ERROR (unexpected message)

 

Please provide your suggestion on this.

 

Regards

Santhanakrishnan

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