3Com SuperStack 4, Руководство по настройке

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174 C
HAPTER
7: M
ULTICAST
P
ROTOCOL
Enabling/Disabling IGMP Snooping
Use the commands in Table 178 to enable/disable IGMP Snooping on Layer 2. First
enable IGMP Snooping globally in System View, and then enable IGMP Snooping
of the corresponding VLAN in VLAN View.
Perform the following configuration in System View and VLAN View.
Although layer 2 and layer 3 multicast protocols can run together, they cannot run
on the same VLAN or its corresponding VLAN interface at the same time. For
example, if the layer 2 multicast protocol is enabled on a VLAN, then the layer 3
multicast protocol cannot operate on this VLAN, and vice versa.
IGMP Snooping functions only when it is enabled both in System View and in
VLAN View.
By default, IGMP Snooping is disabled.
Configuring Router Port Aging Time
Use the commands in Table 179 to manually configure the router port aging time.
If the switch has not received a general query message from the router before the
router port is aged, the switch will remove the port from the MAC multicast
group.
Perform the following configuration in system view.
By default, the port aging time is 105 seconds.
Configuring Maximum Response Time
Use the commands in Table 180 to manually configure the maximum response
time. If the Switch 5500G-EI receives no report message from a port within the
maximum response time, the switch will remove the port from the multicast
group.
Perform the following configuration in System View.
By default, the maximum response time is 10 seconds.
Table 178 Enabling/Disabling IGMP Snooping
Operation Command
Enable/disable IGMP Snooping
igmp-snooping { enable | disable }
Table 179 Configuring router port aging time
Operation Command
Configure router port aging time
igmp-snooping router-aging-time
seconds
Restore the default aging time
undo igmp-snooping router-aging-time
Table 180 Configuring the maximum response time
Operation Command
Configure the maximum
response time
igmp-snooping max-response-time seconds
Restore the default setting
undo igmp-snooping max-response-time