ProCurve 2610-PWR Technical Information download pdf (Page 95)

Multimedia Traffic Control with IP Multicast (IGMP)

Web: Enabling or Disabling IGMP

In the web browser interface you can enable or disable IGMP on a per-VLAN

basis. To configure other IGMP features, telnet to the switch console and use

the CLI.

To Enable or Disable IGMP

1. Click on the Configuration tab.

2. Click on the Device Features button.

3. If more than one VLAN is configured, use the VLAN pull-down menu to

select the VLAN on which you want to enable or disable IGMP.

4. Use the Multicast Filtering (IGMP) menu to enable or disable IGMP.

5. Click on Apply Changes button to implement the configuration change.

For web-based help on how to use the web browser interface screen, click on

the ? button provided on the web browser screen.

How IGMP Operates

The Internet Group Management Protocol (IGMP) is an internal protocol of

the Internet Protocol (IP) suite. IP manages multicast traffic by using

switches, multicast routers, and hosts that support IGMP. (In ProCurve’s

implementation of IGMP, a multicast router is not necessary as long as a

switch is configured to support IGMP with the querier feature enabled.) A set

of hosts, routers, and/or switches that send or receive multicast data streams

to or from the same source(s) is termed a multicast group, and all devices in

the group use the same multicast group address. The switches covered in this

guide support 256 multicast groups.

Message Types

The multicast group running version 2 of IGMP uses three fundamental types

of messages to communicate:

■ Query: A message sent from the querier (multicast router or switch)

asking for a response from each host belonging to the multicast group. If

a multicast router supporting IGMP is not present, then the switch must

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ProCurve 2610-PWR Technical Information Page 95