Инструкции По Установке для 3com S7906E

 

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If the multicast group replacement feature is enabled, the newly joined multicast group 

automatically replaces an existing multicast group with the lowest address.  

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If the multicast group replacement feature is not enabled, new IGMP reports will be automatically 

discarded.  

Follow these steps to configure multicast group replacement globally:  

Enter system view 

system-view 

— 

Enter IGMP snooping view 

igmp-snooping 

— 

Enable multicast group 
replacement  

overflow-replace [ vlan 
vlan-list ] 

Required 

Disabled by default  

 

Configuring multicast group replacement on a port or a group of ports  

Follow these steps to configure multicast group replacement on a port or a group of ports:  

Enter system view 

system-view 

— 

interface interface-type 
interface-number 

Enter Ethernet port/ONU 
port/Layer 2 aggregate 
interface view or port group 
view 

port-group manual 
port-group-name 

Required 

Use either approach 

Enable multicast group 
replacement  

igmp-snooping 
overflow-replace [ vlan 
vlan-list ] 

Required 

Disabled by default  

 

Be sure to configure the maximum number of multicast groups allowed on a port (refer to 

) before enabling multicast group replacement. 

Otherwise, the multicast group replacement functionality will not take effect.  

 

You can change 802.1p precedence of IGMP messages so that they can be assigned higher forwarding 

priority when congestion occurs on their outgoing ports.  

Follow these steps to configure 802.1p precedence for IGMP messages globally: 

Enter system view 

system-view 

—