RE: RFC 4666 M3UA - Reg Request Message

Lincoln, 

Your understanding is correct. We all understand and acknowledge limitations of previous Dynamic registration and issues associated with it. Not only the Dynamic Registration needs to be re-defined with some basic modifications, along with almost a minor functionality (ISUP Proxy) need to be defined as a part of M3UA on SG for such scenarios.

I can't stress enough for the need of such functionalities especially when we have elaborate network in real time domain with Multiple MGs (at-least 40) being controlled by one MGC and resources are shared all across ASPs. 
If each MG is supporting large number of Trunk resources (e.g. say 60K CICs), we are talking large network provisioning in a real time network.

Static registration is not a method for such networks. Flow through provisioning (Dynamic Registration) is required between MGC & SG. 

We have such distributed networks successfully deployed with similar modifications (ISUP Proxy) and enhancement (for dynamic registration procedure) for the same reason.

We seriously think that its time that we should consider Dynamic registration procedure in this direction if we want a better inter-op world around us.

Thanks,
Jitin


-----Original Message-----
From: Haresign Lincoln [mailto:[email protected]] 
Sent: Thursday, November 02, 2006 2:29 PM
To: Barry Nagelberg; [email protected]
Subject: RE: [Sigtran] RFC 4666 M3UA - Reg Request Message

It certainly would be a nice feature.  But there are a large number of
ISUP scenarios that would need to be covered.  For example, if you loose
all ASPs handing a certain CIC range, do you BLO?  Anyway, it seems to
me that this is almost too much for M3UA and almost requires a new
extension specifically for ISUP.

Regards,
Lincoln

-----Original Message-----
From: Barry Nagelberg [mailto:[email protected]] 
Sent: Wednesday, November 01, 2006 4:11 PM
To: [email protected]
Subject: RE: [Sigtran] RFC 4666 M3UA - Reg Request Message

All,

I agree with Jitlin - CIC range functionality should be put back into
Dynamic Registration. After removing it to comply to the spec, we had to
put it back in because one of our customers demanded it.

In cases such as these, I suggest that try harder to listen to our
customers - after all, they are the ones who are paying for SIGTRAN to
be actually implemented and deployed.

Barry Nagelberg
Adax, Inc.

-----Original Message-----
From: Bhandari, Jitin (Jitin) [mailto:[email protected]]
Sent: Wednesday, November 01, 2006 3:53 PM
To: '[email protected]'
Cc: '[email protected]'
Subject: RE: [Sigtran] RFC 4666 M3UA - Reg Request Message


Brian,

No where in the RFC-3332, I understand the interpretation of CIC ranges
is limited to Load Distribution.

When CIC ranges were a part of Routing Key, they can very well be used
for routing and be defined as a part of Routing key. Since, OPC-DPC-CIC
values uniquely identify a resource on the ASP and can very well be
treated is unique routing key from RFC definition.

I very well understand when you talk about CIC & TID being just an
element from Load Sharing perspective but for the same analogy if CIC &
TID are for Load distribution, OPC can also be viewed as Load
distribution method so as to have multiple ASPs (behind SG) handling
parts of SS7 network. It is up-to anyone as how one vision Routing key
arbitration at SG for MGC. Limiting the Routing Key definition at RFC
level is not fair especially when it was talked about in previous RFC.

My point here is that by getting rid of such parameters at RFC level, we
would face many inter-op issues with various vendors in the real work if
one has to pick Dynamic Registration Path. We will only end up with many
drafts like this one modifying the Registration Request message for
handling of SS7 traffic at SG. Inter-op in real world would be a serious
issue with such procedures then.

Also, as I mentioned in my previous email, CIC resources being dynamic
in nature at MGC, a flow through dynamic provisioning support (from MGC
to SG) was provided by having such Keys in the dynamic registration
procedure.

By getting rid of such parameters at RFC level, we are just making
Dynamic Registration procedure un-usable.

-Jitin


-----Original Message-----
From: Brian F. G. Bidulock [mailto:[email protected]]
Sent: Wednesday, November 01, 2006 3:11 PM
To: Bhandari, Jitin (Jitin)
Cc: '[email protected]'
Subject: Re: [Sigtran] RFC 4666 M3UA - Reg Request Message

Jitin,

CIC and TID were only applicable to load distribution and not routing
and were therefore removed from the "routing" key.

See

 
http://www.ietf.org/internet-drafts/draft-bidulock-sigtran-loadsel-04.tx
t

for a equivalent mechanism for controlling load distribution based on
CIC using a "load" key dynamically registered in the REG REQ.

--brian

--
Brian F. G. Bidulock
[email protected]
http://www.openss7.org/

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