H3c-technologies H3C S3100V2 Series Switches Manual de usuario descargar pdf (Pagina 27)

NOTE:

• Enable IGMP snooping globally before enable it in a VLAN.

• When you enable IGMP snooping in a specified VLAN, this function takes effect on the ports in this

VLAN only.

Configuring the version of IGMP snooping

By configuring an IGMP snooping version, you actually configure the version of IGMP messages that

IGMP snooping can process.

• IGMP snooping version 2 can process IGMPv1 and IGMPv2 messages, but not IGMPv3 messages,

which will be flooded in the VLAN.

• IGMP snooping version 3 can process IGMPv1, IGMPv2 and IGMPv3 messages.

Follow these steps to configure the version of IGMP snooping:

To do... Use the command... Remarks

Enter system view

system-view —

Enter VLAN view

vlan vlan-id —

Configure the version of IGMP

snooping

igmp-snooping version

version-number

Optional

Version 2 by default

CAUTION:

If you switch IGMP snooping from version 3 to version 2, the system will clear all IGMP snooping

forwarding entries from dynamic joins, and will:

• Keep forwarding entries for version 3 static (*, G) joins.

• Clear forwarding entries from version 3 static (S, G) joins, which will be restored when IGMP snoopin

is switched back to version 3.

For more information about static joins, see “Configuring static ports.”

Configuring static multicast MAC address entries

In Layer-2 multicast, a Layer 2 multicast protocol—such as IGMP snooping—can dynamically add

multicast MAC address entries. You can also configure static multicast MAC address entries.

Configuring a static multicast MAC address entry in system view

Follow these steps to configure a static multicast MAC address entry in system view

To do... Use the command... Remarks

Enter system view system-view —

Configure a static multicast MAC

address entry

mac-address multicast mac-address

interface interface-list vlan vlan-id

Required

No static multicast MAC address

entries exist by default.

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 110 111

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