Connectivity Guide

Multicast

Multicast is a technique that allows networking devices to send data to a group of interested receivers in a single transmission. For

instance, this technique is widely used for streaming videos. Multicast allows you to more eciently use network resources, specically for

bandwidth-consuming services such as audio and video transmission.

OS10 supports the multicast feature in IPv4 networks and uses the following protocols for multicast distribution:

• Internet Group Management Protocol (IGMP)

• Protocol Independent Multicast (PIM)

Important notes

• OS10 supports IGMP and IPv4 PIM for multicast routing. This release of OS10 does not support IPv6 PIM.

• OS10 supports PIM and IGMP on default and non-default VRFs.

• OS10 does not support multicast routing on S5148F-ON and S3048-ON platforms.

• Multicast ood control is not supported on S4248FB-ON, S4248FBL-ON, and S5148F-ON platforms.

Congure multicast routing

Conguring multicast routing is a two-step process that involves conguring multicast routing and enabling PIM sparse mode (PIM-SM) on

a Layer 3 (L3) interface. The following procedure describes how to congure multicast routing.

For more information about IGMP and PIM feature congurations, see Internet Group Management Protocol and Protocol Independent

Multicast.

NOTE

Multicast ood restrict feature is enabled by default. To ensure that no trac drops occur, Dell EMC recommends that you do one of

the following:

• Disable IGMP snooping on the VLAN between two PIM routers that do not have IGMP receivers on that VLAN.

• Congure the interface between the PIM routers as static mrouter port.

1 Enable multicast routing for IPv4 networks.

OS10# configure terminal

OS10(config)# ip multicast-routing

2 Congure an IP address to a VLAN interface.

OS10(config)# interface vlan 2

OS10(conf-if-vl-2)# ip address 1.1.1.2/24

3 Enable PIM sparse mode on an L3 interface.

OS10(config)# interface vlan 2

OS10(conf-if-vl-2) ip pim sparse-mode

4 From CONFIGURATION mode, congure the rendezvous point (RP) IP address statically and specify the multicast group address

range. The RP IP address should be reachable across the PIM domain.

OS10(config)# ip pim rp-address 171.1.1.1 group-address 225.1.1.3/32

Congure the RP address and multicast group address on all nodes in your network.

Multicast 617