[c-nsp] IOS-XR BGP RR MCID (Multiple Cluster ID)

[Curtis Piehler]

I presume this is supported in IOS-XR but just making sure.

A network across the country is split up into multiple regions.  Each
region housing two RRs where the local region clients peer with them.
Instead of full meshing all of the regional RR consider a tiered topology.
3-4 of the regional RR are designated Super-RR where they full mesh with
each other on a global cluster ID.  The rest of the regional RR peer with
each of the Super-RR and with each other for regions with no super-RR.

The Super-RR areconfigured for the global cluster ID
The Regional-RR are configured for the regional cluster ID
The Super-RR also peer with the regional clients on a per neighbor cluster
ID basis for the local region (set for the Regional cluster ID)
The Regional-RR peer with the Super RR on a per neighbor cluster ID (set
for the Global cluster ID)

The Super-RR end up straddling the fence between the global cluster ID and
the regional cluster ID
The redundant Regional RR also end up straddling the fence between the
global cluster ID and the regional cluster ID but it's main purpose is to
be a redundant RR within the region
The local region clients peer with the Super-RR in that region and also
with the redundant regional RR.

Is this feasible/doable with MCID?