3com WX3000 Manuel D’Utilisation

 

2-12 

Follow these steps to configure a static router port in VLAN view: 

Enter system view 

system-view 

— 

Enter VLAN view 

vlan vlan-id 

— 

Configure a specified port as a 
static router port 

multicast static-router-port 
interface-type interface-number

Required 

By default, no static router port 
is configured. 

 

Generally, hosts running IGMP respond to the IGMP query messages of the multicast device. If hosts 

fail to respond for some reason, the multicast device may consider that there is no member of the 

multicast group on the local subnet and remove the corresponding path.  

To avoid this from happening, you can configure a port of the VLAN of the device as a multicast group 

member. When the port receives IGMP query messages, the multicast device will respond. As a result, 

the port of the VLAN can continue to receive multicast traffic.  

Through this configuration, the following functions can be implemented: 

z 

When an Ethernet port is configured as a simulated member host, the device sends an IGMP 

report through this port. Meanwhile, the device sends the same IGMP report to itself and 

establishes a corresponding IGMP entry based on this report.   

z 

When receiving an IGMP general query, the simulated host responds with an IGMP report. 

Meanwhile, the device sends the same IGMP report to itself to ensure that the IGMP entry does not 

age out.  

z 

When the simulated joining function is disabled on an Ethernet port, the simulated host sends an 

IGMP leave message. 

Therefore, to ensure that IGMP entries will not age out, the port must receive IGMP general queries 

periodically. 

Follow these steps to configure a port as a simulated group member: 

Enter system view 

system-view — 

Enter Ethernet port view 

interface interface-type 
interface-number 

— 

Configure the current port as a 
simulated multicast group 
member 

igmp host-join group-address 
[source-ip source-address ] 
vlan vlan-id 

Optional 

Simulated joining is disabled by 
default.