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IGMP querier, a switch with the lowest IP address becomes the IGMP querier.
In IGMP Query selection, administrator can select V1, V2 or Disable. V1 means IGMP V1
General Query and V2 means IGMP V2 General Query.. The query will be forwarded to all
multicast groups in the VLAN. Disable allows to disable IGMP Query.
Query Interval(s): The period of query sent by querier.
Query Maximum Response Time: The span querier detect to confirm there are no more
directly connected group members on a LAN.
Once the settings is configured, click on Apply to apply configuration for taking effective.
4.9.3
Unknown Multicast
After enabled IGMP Snooping, the known multicast can be filtered by IGMP Snooping
mechanism and forwarded to the member ports of the known multicast groups. The other
multicast streams which are not leant is so-called unknown multicast, the switch decide
how to forward them based on the setting of this page.
Send to Query Ports:
The unknown multicast will be sent to the Query ports. The Query
port means the port received the IGMP Query packets. It is usually the uplink port of the
switch.
Send to All Ports:
The unknown multicast will be flooded to all ports of the same VLAN,
even they are not the IGMP member ports of the groups.
Discard:
The unknown multicast will be discarded. Non-member ports will not receive the
unknown multicast streams.
Once you finish configuring the settings, click on Apply to apply your configuration.
4.9.4
GMRP
To enable the GMRP configuration, the Global GMRP Configuration should be enabled
first. And all the port interfaces should enable GMRP learning as well. Then the switch
exchanges the IGMP Table with other switches which is also GMRP-aware devices.
4.9.5
CLI Commands of the Multicast Filtering
Command Lines of the multicast filtering configuration
Feature
Command Line
IGMP Snooping
IGMP Snoopi
–g -
Global
Switch(config)# ip igmp snooping
IGMP snooping is enabled globally. Please specify on which
vlans IGMP snooping enables
Switch(config)# ip igmp snooping <?>
immediate-leave leave group when receive a
leave message
last-member-query-interval the interval for which the
switch waits before updating the table entry
source-only-learning Source-Only-Learning
vlan Virtual LAN
IGMP Snoopi
–g -
VLAN
Switch(config)# ip igmp snooping vlan
VLANLIST allowed vlan list
all all existed vlan
Switch(config)# ip igmp snooping vlan 1-2
IGMP snooping is enabled on vlan 1
Содержание JetNet 6910G-M12 Series
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