25-20
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 25 Configuring IPv4 Multicast VPN Support
Configuring MVPN
Displaying IPv4 Multicast VRF Routing Information
To display the known PIM neighbors for a particular MVRF, use the show ip pim vrf neighbor
command:
Router# show ip pim vrf 98 neighbor
PIM Neighbor Table
Neighbor Interface Uptime/Expires Ver DR
Address Prio/Mode
40.60.0.11 Tunnel96 00:00:31/00:01:13 v2 1 / S
40.50.0.11 Tunnel96 00:00:54/00:00:50 v2 1 / S
Router#
Configuring Interfaces for Multicast Routing to Support MVPN
These sections describe how to configure interfaces for multicast routing to support MVPN:
• Multicast Routing Configuration Overview, page 25-20
• Configuring PIM on an Interface, page 25-20
• Configuring an Interface for IPv4 VRF Forwarding, page 25-21
• Sample Configuration, page 25-22
Multicast Routing Configuration Overview
Protocol Independent Multicast (PIM) must be configured on all interfaces that are being used for IPv4
multicast traffic. In a VPN multicast environment, you should enable PIM on at least all of the following
interfaces:
• Physical interface on a provider edge (PE) router that is connected to the backbone.
• Loopback interface that is used for BGP peering.
• Loopback interface that is used as the source for the sparse PIM rendezvous point (RP) router
address.
In addition, you must also associate MVRFs with those interfaces over which they are going to forward
multicast traffic.
BGP should be already configured and operational on all routers that are sending or receiving multicast
traffic. In addition, BGP extended communities must be enabled (using the neighbor send-community
both or neighbor send-community extended command) to support the use of MDTs in the network.
Configuring PIM on an Interface
To configure PIM on an interface, perform this task:
Command or Action Purpose
Step 1
Router# configure terminal
Enters global configuration mode.
Step 2
Router(config)# interface
type
{
slot/port
|
number
}
Enters interface configuration mode for the specified
interface.
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