RE: ASP Capabilities value 0x2 of interworking field

Brian,

> > > Interconnect is not done at the core of the network.  GTT is.  No self
> > > respecting SS7 network operator would connect your SUA junk to their
> > > primary STPs any day soon.  Lot's o' luck.
> > [TOLGA]I think you also agree that there is a need to organize networks
> > hierachicaly and for that reason we need relaying. That hierarchical
> > organization can depoend on different SS7 constructs depending
> on the needs
> > of the operator, e.g. GTT, and entities supporting relay can be deployed
> > anywhere in the network again depending on the needs.
>
> And so SUA permits any node to have the relay capability in the IP domain.
[TOLGA]I don't see how this can happen just by definition of IPSP or why we
should use IPSP by communicating with a node, which is relaying messages. In
any case, I think this is an architectural issue, which needs to be
discussed/clarified throughly.
>
> > [TOLGA]I disagree with you. It allows hierarchical organization/easier
> > configuration of the network and also backhauling SS7 traffic
> over IP. If
> > you look to other IP based protocols, which are supposed to be
> used between
> > core network entities, you will see similar capabilities as well, e.g.
> > Diameter. Probably, I should quote one of your favorites: "If
> you don't want
> > it, do not use it"
>
> STPs act a link concentrators.  When there are no links, there is no need
> for concentration.  MTP relay in the IP domain is pointless.
[TOLGA]I again have to disagree with you. STPs do perform more than just
link concentration, e.g. message routing. In IP domain, if you have direct
connections between each entity, any change in the configuration could
effect the whole network, and most people wouldn't like this at all. By
centralizing certain routing decisions, one can limit necessary changes to
those centralized entities. Furthermore, one could like to have relay to
backhaul SS7 traffic over IP or to have a single interface between different
administrative domains where some screening based on SS7 constructs could be
performed. As I indicated before, relay is a common concept for IP-based
protocols as well, if they are going to be used between core network
enitites.