Enabling IP Multicast Routing

Enabling multicast routing is the first step for configuring multicast functions.

Prerequisites

Before enabling IP multicast routing functions, complete the following tasks:

Configuring the link layer protocol parameters and an IP address for each interface to make the link protocol of the interface Up.
Configuring a unicast routing protocol to make IP routes between nodes reachable.

Context

IGMP is applicable to the network segment where FWs are connected to hosts. FWs and hosts need to run IGMP.

Before configuring IGMP, enable IP multicast routing. IP multicast routing is the precondition for configuring all multicast functions. If IP multicast routing is disabled, the multicast configurations are deleted.

Procedure

Access the system view.
system-view
Enable IP multicast routing in the public network instance.
multicast routing-enable

By default, IPv4 multicast routing is not enabled in the public network instance.

Configurations related to VPN instances are applicable only to Provider Edge (PE) devices. On the PE, if the VPN instance interface is connected to hosts, you need to perform following steps.
(Optional) Access the VPN instance view.
ip vpn-instance vpn-instance-name
(Optional) Enable the IPv4 address family for the VPN instance and access the VPN instance IPv4 address family view.
ipv4-family
(Optional) Configure an RD for the VPN instance IPv4 address family.
route-distinguisher route-distinguisher
(Optional) Enable IP multicast routing in the VPN instance IPv4 address family.
multicast routing-enable