[c-nsp] best for IPTV: pure L3 multicast, Draft Rosen MVPN or MLDP based MVPN?

[Mark Tinka]

On Thursday, May 10, 2012 10:48:02 PM Sašo Pirnat wrote:

> we are using c7600 and draft-rosen for more then 5 years
> now, without any major problems. Now we have migrated
> core routers to juniper mx and we have to do some tweaks
> to work with cisco.

At previous employer, we had the opportunity to consider 
Rosen or NG-MVPN's (on Juniper kit).

NG-MVPN's were easier to deploy, because the core could be 
totally PIM-free (which is a big deal on the older Juniper 
kit, which need Tunnel PIC's to support Multicast - in the 
newer platforms, the Tunnel PIC's are integrated into the 
line cards, e.g., the MX-series routers).

NG-MVPN's are cool because:

	o You only run PIM on the Sender PE router (that
	  which is connected toward the Source).

	o Your core is PIM-free.

	o You only run PIM or IGMP on the Receiver PE
	  routers (those which are connected toward the
	  Receivers).

	o You signal the data plane via p2mp RSVP-TE or mLDP
	  (i.e., MPLS). So no need for IP/GRE, although it
	  is an option.

	o The solution behaves like an l3vpn. While
	  Multicast is the application, it is "network-
	  based", meaning that the deployment is actually
	  Unicast in nature, but traffic is forwarded in a
	  Multicast fashion.


Cisco are planning full NG-MVPN support in Q1'13 on the 
ASR9000. I think the ASR1000's will be getting support 
somewhere around there too, although Cisco are trying to 
force mLDP down our throats, and fuffing about on implement 
p2mp RSVP-TE support, along with BGP C-Multicast support. 
But they'll get there, they'll have no choice, just like BGP 
signaling for VPLS was introduced on the ASR9000 after much 
hullabaloo.

Cheers,

Mark.