User's Manual

Table Of Contents
319
Users Manual of CS-6306R
30.1.1.4 Configuring the Function to Filter Multicast Message Without Registered
Destination Addresss
When multicast message target fails to be found (DHL, the destination address is not registered in the switch
chip through igmp-snooping), the default process method is to send message on all ports of VLAN.Through
configuration, you can change the process method and all multicast messages whose destination addresses
are not registered to any port will be dropped.
Command Description
ip igmp-snooping
dlf-framesfilter
Drops multicast message whose destination fails to be
found.
no ip igmp-snooping
dlf-frames
Resumes the fault configuration (forward).
(1) The attribute is configured for all VLANs.
(2) The default method for the switch to handle this type of message is forward
(message of this type will be broadcasted within VLAN).
30.1.1.5 Configuring Router Age Timer of IGMP-snooping
The Router Age timer is used to monitor whether the IGMP inquirer exists. IGMP inquirers maintains
multicast addresses by sending query message. IGMP-snooping works through communication between
IGMP inquier and host.
Perform the following configuration in global configuration mode:
Command Description
ip igmp-snooping timer
router-agetimer_value
Configures the value of Router Age of
IGMP-snooping.
no ip igmp-snooping timer router-age Resumes the default value of Router
Age of IGMP-snooping.
For how to configure the timer, refer to the query period setup of IGMP inquirer. The
timer cannot be set to be smaller than query period. It is recommended that the
timer is set to three times of the query period.
The default value of Router Age of IGMP-snooping is 260 seconds.