[c-nsp] Multicast distribution over backbone

[Robert Hass]

Hi

I have 6 routers in 6 cities interconnected by 1Gbps links from third party
providers (just 1 VLAN over xconnects, no QinQ, MTU=1500).  Each city is
connected to main node.  I have to distribute multicast streams (around 100
channels of IPTV) from source 1 city to 5 others over these 1Gbps links.
All devices are Cat6500/Sup720.  All routers runs IS-IS and iBGP.  And in
each city local distrubution will be done over PIM Spare-Mode to L3 switches
(Cat3560-X).

How do this best ? Use mBGP ? Use MSDP ? Configure just PIM-SM on backbone
interfaces ? Or maybe some hybrid solution ?

Robert