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ES4626-SFP Management Guide.pdf

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Chapter 19 Multicast VLAN<br />

19.1 Introductions To Multicast VLAN<br />

Based on current multicast order method, when orders from users in different VLAN,<br />

each VLAN will copy a multicast traffic in this VLAN, which is a great waste of the<br />

bandwidth. By configuration of the multicast VLAN, we add the switch port to the<br />

multicast VLAN, with the IGMP Snooping functions enabled, users from different VLAN<br />

will share the same multicast VLAN. The multicast traffic only exists within a multicast<br />

VLAN, so the bandwidth is saved. As the multicast VLAN is absolutely separated from<br />

the user VLAN, security and bandwidth concerns can be met at the same time, after the<br />

multicast VLAN is configured, the multicast traffic will be continuously sent to the users.<br />

19.2 Multicast VLAN Configuration Task<br />

1. Enable the multicast VLAN function<br />

2. Configure the IGMP Snooping<br />

1. Enable the multicast VLAN function<br />

Command<br />

VLAN config mode<br />

multicast-vlan<br />

no multicast-vlan<br />

multicast-vlan association <br />

no multicast-vlan association <br />

2. Configure the IGMP Snooping<br />

Command<br />

Global Mode<br />

ip igmp snooping vlan <br />

no ip igmp snooping vlan <br />

ip igmp snooping<br />

Explanation<br />

Configure a VLAN and enable the multicast<br />

VLAN on it. The “no multicast-vlan”<br />

command disables the multicast function<br />

on the VLAN<br />

Associate a multicast VLAN with several<br />

VLANs. The “no" form of this command<br />

deletes the related VLANs associated with<br />

the multicast VLAN<br />

Explanation<br />

Enable the IGMP Snooping function on the<br />

multicast vlan. The "no” form of this<br />

command disables the IGMP Snooping on<br />

the multicast vlan<br />

Enable the IGMP Snooping function. The<br />

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