Re: [Mobopts] Same MPA server for 2 access networks

[Ashutosh Dutta <adutta at research.telcordia.com>]

Carlos,
       As I just replied to your personal email to me, you can have an 
AA (Authentication Agent) and CA (Configuration Agent) that are two 
logical components of an MPA server in the core of the IMS network. 
These two functions of course can coexist on the same physical box if 
that is what you are asking for.

Thanks
Ashutosh

Carlos Rodrigues wrote:
> These agents need to stay with access network but I can have a 
> centralized MPA server in the edge of IMS core, no?
>
> It is like DNS... we don't have several DNS servers to access to the 
> Internet. It is done relay...
>
> Cheers,
> Carlos Rodrigues (Computer Science BSc student)
> ESTG - IPL
> Leiria, Portugal
>
> ----- Original Message -----
> From: "Ashutosh Dutta" <adutta at research.telcordia.com>
> To: "Carlos Rodrigues" <cmjr at iol.pt>
> Cc: <mobopts at irtf.org>
> Sent: Monday, April 06, 2009 7:55 PM
> Subject: Re: [Mobopts] Same MPA server for 2 access networks
>
>
> > Carlos,
> >         Let me repeat some of what I have said earlier to you.
> > MPA server has several logical components, such as Authentication 
> > Agent, Configuration Agent, Buffering Agent, Tunneling agent. Some of 
> > these components could be aggregated for each access network, such as 
> > Authentication Agent, and Configuration Agent. However, part of 
> > Configuration Agent needs to stay with each access network (e.g., DHCP 
> > relay). Buffering Agent and Tunneling Agent usually stay at the edges 
> > with each access network.
> >
> > Thus, it is a design decision as to how you want to split the 
> > functionality of the MPA server.
> >
> > Thanks
> > Ashutosh
> >
> >
> > Carlos Rodrigues wrote:
> > > Hi!
> > >
> > > I have question about the number of MPA servers necessary in a 
> > > interworking scenario.
> > > If I have a scenario with 2 access networks (with different 
> > > technologies), will need two CA, two AA and two tunneling agents and 
> > > buffering agents if perform handover from both ways (A to B and B to 
> > > A), right?
> > >
> > > First, I'm trying understand why (can give some tips?);
> > > Second, it's not possible aggregate these 2 MPA server in a single 
> > > entity? In a intra domain scenario makes sense.
> > >
> > > All help or support will be very helpful.
> > >
> > > Cheers,
> > > Carlos Rodrigues (Computer Science BSc student)
> > > ESTG - IPL
> > > Leiria, Portugal
> > >
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