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Implementing Multicast Routing on Cisco IOS XR Software
See the "Configuring BGP as a PE-CE Protocol," "Configuring OSPF as a PE-to-CE Protocol," and
"Configuring EIGRP as a PE-to CE Protocol" sections in Cisco IOS XR Routing Configuration Guide
for the Cisco CRS Router.
•
Specifying the PIM VRF Instance, on page 104
Prerequisites for Multicast VPN
• PIM and multicast forwarding must be configured on all interfaces used by multicast traffic. In an MVPN,
you must enable PIM and multicast forwarding for the following interfaces:
Note
• Interfaces in the VPN intended for use in forwarding multicast traffic must be enabled for PIM and
multicast forwarding.
• BGP should already be configured and operational on all routers that are sending or receiving multicast
traffic.
• To enable MVPN, you must include a VPN IPv4 address-family (AFI) in your BGP configuration. See
Restrictions for Multicast VPN for Multicast Routing, on page
section in Cisco IOS XR Routing Configuration Guide.)
• All PE routers in the multicast domain must be running a Cisco IOS XR Software image that supports
MVPN.
• Multicast forwarding must be configured for the global IPv4 address family.
• Each multicast SM VRF domain must have an associated PIM rendezvous point (RP) definition. Using
Auto-RP and the bootstrap router (BSR), you may configure RP services in the MVPN on the
customer-edge (CE) device because the MVPN learns about the RP dynamically. The VRF interface
can be used as a listener on the PE device.
To enable static RP services, you must configure every device in the domain for this purpose.
Restrictions for Multicast VPN for Multicast Routing
• Configuration of the MDT source on a per-VRF basis is only supported on IPv4.
• The MDT group address should be the same for both the address families in the same VRF.
Enabling a VPN for Multicast Routing
This task enables multicast VPN routing for IPv4.
◦ Physical interface on a provider edge (PE) router that is connected to the backbone.
◦ Interface used for BGP peering source address.
◦ Any interfaces configured as PIM rendezvous points.
PIM and multicast forwarding are enabled in multicast routing configuration mode. No
additional configuration is required in router pim mode to enable the PIM protocol.
Cisco IOS XR Multicast Configuration Guide for the Cisco CRS Router, Release 5.2.x
Configuring Multicast VPN
(optional)
101. (See also the "Enabling BGP Routing"
101
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