3com 5500-ei pwr Instruccion De Instalación

 

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Although both Layer 2 and Layer 3 multicast protocols can run on the same switch simultaneously, 

they cannot run simultaneously on a VLAN or its corresponding VLAN interface. 

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Before enabling IGMP Snooping in a VLAN, be sure to enable IGMP Snooping globally in system 

view; otherwise the IGMP Snooping settings will not take effect. 

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If IGMP Snooping and VLAN VPN are enabled on a VLAN at the same time, IGMP queries are 

likely to fail to pass the VLAN. You can solve this problem by configuring VLAN tags for queries. 

For details, see 

.  

 

With the development of multicast technologies, IGMPv3 has found increasingly wide application. In 

IGMPv3, a host can not only join a specific multicast group but also explicitly specify to receive or reject 

the information from a specific multicast source. Working with PIM-SSM, IGMPv3 enables hosts to join 

specific multicast sources and groups directly, greatly simplifying multicast routing protocols and 

optimizing the network topology. 

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 

— 

Enter VLAN view 

vlan vlan-id 

— 

Configure the version of IGMP 
Snooping 

igmp-snooping version  
version-number 

Optional 

The default IGMP Snooping 
version is version 2. 

 

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Before configuring related IGMP Snooping functions, you must enable IGMP Snooping in the 

specified VLAN. 

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Different multicast group addresses should be configured for different multicast sources because 

IGMPv3 Snooping cannot distinguish multicast data from different sources to the same multicast 

group.