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Multicast over Layer 3 VPNs Overview
The Junos OS provides three ways to configure IP version 4 (IPv4) multicast over Layer 3 virtual private networks (VPNs):
- Multiprotocol BGP-based multicast VPNs: next-generation, defined by a set of sender sites and a set of receiver sites and use BGP as the signaling protocol. We recommend using this method to configure multicast on Layer 3 VPNs because it is a simpler implementation than draft-rosen multicast VPNs.
- Draft-rosen multicast VPNs with service provider tunnels operating in any-source multicast (ASM) mode—Described in RFC 4364, BGP/MPLS IP Virtual Private Networks (VPNs) and based on Section Two of the IETF Internet draft draft-rosen-vpn-mcast-06.txt, Multicast in MPLS/BGP VPNs. This information is provided to you in case you already have dual PIM multicast VPNs configured on your network.
- Draft-rosen multicast VPNs with service provider tunnels operating in source-specific multicast (SSM) mode—Described in RFC 4364, BGP/MPLS IP Virtual Private Networks (VPNs) and based on the IETF Internet draft draft-rosen-vpn-mcast-07.txt, Multicast in MPLS/BGP IP VPNs.
The reader should be familiar with Layer 3 VPN operation on Juniper Networks routers, as well as standard PIM configurations.
For additional information about multicast over Layer 3 VPNs, see:
- Junos Multicast Protocols Configuration Guide
- Junos VPNs Configuration Guide
- RFC 2547, BGP/MPLS VPNs
- RFC 3618, Multicast Source Discovery Protocol (MSDP)
- RFC 4364, BGP/MPLS IP Virtual Private Networks (VPNs)
- Internet draft draft-rosen-vpn-mcast-06.txt, Multicast in MPLS/BGP VPNs (expires April 2004)
