Configuring Multicast Forwarding
Defining IGMP Snooping
Page 171
Defining IGMP Snooping
When IGMP Snooping is enabled globally, all IGMP packets are forwarded to the CPU. The CPU analyzes the
incoming packets and determines:
•
Which ports want to join which Multicast groups.
•
Which ports have Multicast routers generating IGMP queries.
•
Which routing protocols are forwarding packets and Multicast traffic.
Ports requesting to join a specific Multicast group issue an IGMP report, specifying that Multicast group is accept-
ing members. This results in the creation of the Multicast filtering database. To enable IGMP Snooping:
1.
Click
Advanced Setup > Multicast Support > IGMP
. The
IGMP Snooping Page
opens:
Figure 110: IGMP Snooping Page
The
IGMP Snooping Page
contains the following fields:
•
Enable IGMP Snooping Status
— Indicates if IGMP Snooping is enabled on the device. IGMP Snooping
can be enabled only if Bridge Multicast Filtering is enabled. The possible field values are:
–
Checked
— Enables IGMP Snooping on the device.
–
Unchecked
— Disables IGMP Snooping on the device.
•
VLAN ID
— Specifies the VLAN ID.
•
IGMP Snooping Status
— Indicates if IGMP snooping is enabled on the VLAN. The possible field values
are:
–
Enable
— Enables IGMP Snooping on the VLAN.
–
Disable
— Disables IGMP Snooping on the VLAN.
•
Auto Learn
— Indicates if Auto Learn is enabled on the device. If Auto Learn is enabled, the devices auto-
matically learns where other Multicast groups are located. Enables or disables Auto Learn on the Ethernet
device.The possible field values are:
–
Enable
— Enables auto learn
–
Disable
— Disables auto learn.
Содержание DES-3252P - Web Smart Switch
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