Dell EMC SmartFabric OS10 User Guide Release 10.5.1

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 efficiently use network resources, specifically 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)

Configuration notes

All Dell EMC PowerSwitches except MX-Series:

When there is an exclude join, the show {ip | ipv6} {igmp | mld} snooping groups detail command lists the member port under both the wild-card (--) source, and sources that are listed in the report. The member port listed under the wild-card (--) source has the expiry timer running and indicates that the multicast data packets that do not match the excluded sources for this member port are forwarded to that port.

OS10# show ip igmp snooping groups detail
Interface vlan10
Group 234.1.1.1
Source List
--
Member Port Mode Uptime
Expires
ethernet1/1/36 Exclude 00:01:33
00:01:59
ethernet1/1/38 Exclude 00:01:33
00:01:54
15.1.1.1
Member Port Mode Uptime
Expires
ethernet1/1/36 Exclude 00:01:33
Never
21.1.1.1
Member Port Mode Uptime
Expires
ethernet1/1/38 Exclude 00:01:33 Never