Multicast and Routing Guide K/KA/KB.15.15

1 Multimedia Traffic Control with IP Multicast (IGMP)
Overview
This chapter describes multimedia traffic control with IP multicast—Internet Group Management
Protocol (IGMP) controls—to reduce unnecessary bandwidth usage on a per-port basis, and how
to configure it with the switch's built-in interfaces. For general information about IGMP, see “IGMP
general operation and features” (page 24).
NOTE: For more information, see the Access Security Guide for your switch.
Enabling IGMP
In the factory default configuration, IGMP is disabled. To enable IGMP
• If multiple VLANs are not configured:
Configure IGMP on the default VLAN (DEFAULT_VLAN; VID=1.)
• If multiple VLANs are configured:
Configure IGMP on a per-VLAN basis for every VLAN where this feature is to be used.
Configuring and displaying IGMP (CLI)
Viewing IGMP configuration for VLANs
Syntax:
[vlan vid]
Displays IGMP configuration for a specified VLAN or for all VLANs on the switch.
Example 1 Displaying IGMP status for a VLAN
HP Switch(config)# show ip igmp vlan 1
IGMP Service Protocol Info
Total VLANs with IGMP enabled : 30
Current count of multicast groups joined : 20
VLAN ID : 2
VLAN Name : VLAN2
IGMP version : 2
Querier Address : 10.255.128.2
Querier Port : A1
Querier UpTime : 1h 51m 59s
Querier Expiration Time : 2min 5sec
Ports with multicast routers: A1, A5-A6
Active Group Addresses Type Expires Ports Reports Queries
---------------------- ---------- --------------- ---------- ------- -------
226.0.6.7 Filter 2min 5sec A1 10 10
226.0.6.8 Standard 3min 20sec A2 20 20
Viewing the current IGMP configuration
Syntax:
show ip igmp config
Displays IGMP configuration for all VLANs on the switch.
show ip igmp vlan vid config
Overview 15