Multicast within vrf on 7200's

[johnelliot6]

Hi,

We have network consisting of approx. 8 7200's running LNS/MPLS/BGP and we provide predominantly private networks to clients(Majority of client networks are a mix of Ethernet tails and DSL).

We have received a request from one client to support multicast - Having never implemented multicast, have a few questions:

1. Is is supported/possible to provide multicast within a vrf on 7200's?(From initial investigations, it appears to be)
2. Is it possible to only enable mutilcast in a vrf(i.e. not globally)?
3. Any recommended guides/best pratices?(Googling has revealed nothing really that is similiar to what we want to do)
4. What are the potential ramifications?(Resource overhead, Security implications, anything else?)

Thanks in advance.

[Mohamed Sobair]

Hi,

Answers Inline,

1- Its surly supported in 7200 to run multicast for vrfs.

2- Yes its possible with the command (IP multicast-routing vrf (Name) , this should enable Multicast for Only the Vrf.

3-  Cisco recommends Implementing Source Specific Multicast to optimize Multicast traffic and supports higher bandwidth.

4- There is a lot of Security Recommendations when running Multicast, Here are some Notes to be considered:

a) Implement TTL Scoping for the multicast traffic.

b) RP Protection (Limiting Registration requests, Assigning particular Groups for the RP).

C) The RP Announce if Auto-rp is implemented should be limited using the Scope command.

HTH

Mohamed