Re: M3UA notify message

Hi,
if this is the case, then what will happen when(4 cases given below are
different from each other) :-
1. AS(consisting of ASP1 and ASP2) is active at SG (consisting of SGP1 and
SGP2) since ASP1 has done ASP active at SGP1. AS is in override mode and now
ASP2 sends ASP active message to SGP2 , now what will happen. Should SGP1
send alternate ASP active notify to ASP1 and mark ASP2 as active. But if
such is the case , ASP2 has not yet formed the association with SGP1.
2. should the SS7 traffic of SGP2 be routed through SGP1 since AS(load share
mode) is active(ASP1 has done active at SGP1) and SGP2 has already sent the
notify for AS active to ASP2.
3. If  AS is in loadshare mode (rest of the configuration same as in 1) .
Now when ASP2 sends active to SGP2 , should notify be sent again to the
ASP2.
4. In n+k architecture should this n be taken for SG or this is for SGP. I
mean to say AS should become active at SG (when it is active at n SGP's ,
supposing single ASP of AS is active at each of n SGP)or (should n ASP's be
active at any SGP) or (n ASP's should be active only no matter where and how
they are).

There was an earlier mail (copied below) , in which SGP2 sends notify again
to ASP which should not happen if we are going according to the current
scenario.

---------- Forwarded message ----------
From: Tolga Asveren <[email protected]>
Date: Feb 11, 2006 12:58 AM
Subject: RE: [Sigtran] SG view of the ASP
To: [email protected]

As far as I understand, the scenario presented by Krishna should follow the
following  flow:

  ASP1             SGP1       SGP2
   |                |           |
   |---ASPAC(RC1)-->|           |
   |                |           |
   |<-ASPAC-ACK(RC1)|           |
   |                |           |
   |<-NTFY(AS1 ACT)-|           |
   |                |           |
   |           ASP1 is now      |
   |           ACTIVE for AS1   |
   |                |           |
   |           AS1 is now       |
   |             ACTIVE         |
   |                |           |
   |-------ASPAC(RC1|---------->|
   |                |           |
   |<------ASPAC-ACK(RC1)-------|
   |                |           |
   |<------NTFY(AS1 ACTIVE)-----|
   |                |           |
   |                |         ASP1 is now
   |                |         ACTIVE for AS1
   |                |           |
   |                |          AS1 is now
   |                |          ACTIVE
   |---ASPIA(RC1)-->|           |
   |                |           |
   |<-ASPIA-ACK(RC1)|           |
   |                |           |
   |<-NTFY(AS1 INACT)           |
   |                |           |
   |             ASP1 is now    |
   |             INACTIVE for   |
   |             AS1|           |
   |                |           |
   |             AS1 is now     |
   |             INACTIVE       |
   |

Based on the following passage in his message:

"The explanation given by the Third party SG team is that since they
treat association from SGP1 to ASP as one ASP (ASP1) and the association
from SGP2 to ASP as a separate ASP (ASP2), they are over writing the
status when the SGP2 received the ASP ACTIVE message from the ASP. They
suggest that I put the trafficmode=loadshare and that would solve the
problem.  So I am really confused."


I believe the problem is that SG executes SGP semantics as behaving as a
single distributed SGP, but this will cause interoperability problems
because an ASP would expect each SGP peer to execute these procedures
separetly and independently. Please note that ASP will see each remote SCTP
endpoint as a different SGP.

----- Original Message ----- 
From: "Brian F. G. Bidulock" <[email protected]>
To: "nitin" <[email protected]>
Cc: <[email protected]>
Sent: Wednesday, February 22, 2006 1:46 PM
Subject: Re: [Sigtran] M3UA notify message


> nitin,
>
> nitin wrote:                                    (Wed, 22 Feb 2006
13:55:46)
> >
> >    hi,
> >
> >    consider a scenario,
> >
> >    SG  having two SGP's and one AS is configured on SG. If SGP's are
SGP1
> >    and  SGP2.  AS having two ASP's (ASP1 and ASP2) . ASP1 has
established
> >    association  wiht SGP1 and ASP2 has established association with
SGP2.
> >    Now  if  ASP1  sends  Asp  active  and state of AS changes to active
,
> >    should  ASP2 receive notify for AS state change (assuming ASP1 was
not
> >    in down state at SGP2).
>
> Yes.
>
> --brian
>
> -- 
> Brian F. G. Bidulock
> [email protected]
> http://www.openss7.org/
>
>
>
>
> -- 
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>