IPTV in service provider - Multicast

[Hythim Ali El Hadad]

Hi,

If we need to run IPTV service inside service provider . Core network is MPLS

I'm finding Default MDT/GRE Profile 0 and mLDP Profile 1

Why we can't use DMVPN to carry PIM between edge routers

Is there any drawback for DMVPN on this . May be not scalable !! or it will fit good for this !

Thanks

Haitham

[Giuseppe Larosa]

Hello Haitham,

the service provider solutions for customer multicast for an MPLS VPN include the following:

- draft Rosen multicast VPN that requires PIM in the backbone and uses global multicast addresses (at least one for each customer VPN). User multicast traffic is encapsulated in GRE packets with a multicast destination in the global multicast space of the service provider. Each PE router has to join the MDT group. Additional groups can be consumed by a single customer VPN for streams of a certain volume / rate.

- NG multicastVPN  in the Cisco implementation uses mLDP that builds MP to MP Label switched Paths. This solution does not require to implement PIM in the backbone and do not consume multicast addresses in the global address space of the service provider. The only drawback is that only selected platforms support it like ASR 1000 and ASR 9000.

DMVPN is a solution thought for saving on configuration of hub routers when adding new spokes and uses multipoint GRE NHRP protected by IPSec profile, but it has been introduced for unicast traffic as far as I know.

It might be able to carry multicast traffic.

Hope to help

Giuseppe

[Hythim Ali El Hadad]

Hi Guiseppe

Thank you very much for your kind reply

If I have 1 source site with 5 main receiver sites connected through MPLS. And another 100 site connected to each one of those 5 with IP routing in ring

So I think to run Rosen GRE profile 0 between the source and 5 receivers while they are forming 1 VRF and to treat them as CE . They will talk C-PIM over the MPLS that is running P-PIM [MDT] . Then each 1 of 5 main sites will run PIM with the other 100 connected to it in ring

Is it scalable and good ?

Also I though for GRE as to have DMVPN between the source and the 5 main sites , then run PIM as on IP Network. No care for MPLS here and we won't touch the core provider network . So I see it easier as a solution. But is this DMVPN will work as expected or there is any drawbacks here regarding delay or performance

Sure the mLDP is better but your info was very valuable about the limitation for hardware support

Thanks again

Haitham

[Giuseppe Larosa · Accepted solution]

Hello @Hythim Ali El Hadad 

have a look at the following thread

https://community.cisco.com/t5/routing/multicast-over-dmvpn/td-p/2933586

It looks like that Multicast is possible on DMVPN but traffic sources should be behind the hub site no direct spoke to spoke multicast stream is possible.

Given your scenario description you could use a DMVPN if all the sources are in the hub site.

The draft Rosen mGRE multicast VPN requires to enable PIM in the backbone, but makes your infrastructure ready to support multiple customers with multicast traffic needs.

Hope to help

Giuseppe