3com S7906E Instruccion De Instalación

 

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IGMP snooping must be enabled globally before it can be enabled in a VLAN.  

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After enabling IGMP snooping in a VLAN, you cannot enable IGMP and/or PIM on the 

corresponding VLAN interface.  

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When you enable IGMP snooping in a specified VLAN, this function takes effect for 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.  

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

which will be flooded in the VLAN.  

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

Follow these steps to configure the version of IGMP snooping:  

Enter system view 

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Enter VLAN view 

vlan vlan-id 

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Configure the version of IGMP 
snooping  

igmp-snooping version 
version-number 

Optional 

Version 2 by default  

 

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:  

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

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

snooping is switched back to version 3. 

For details about static joins, Refer to 

.  

 

You can globally configure the maximum number of entries in the IGMP snooping forwarding table. 

When the number of forwarding entries maintained by the device reaches the threshold, the device 

creates no more forwarding entries until some entries time out or get manually removed.  

Follow these steps to configure the maximum number of entries in the forwarding table 

Enter system view 

system-view 

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