•
Keep the same VID and priority
If the data has no VLAN ID, please use the default priority and port VID to create a VLAN ID and insert it into the
data frame, otherwise the data frame keeps the same.
•
Default VID replace the VID of the ingress packets
If the data has no VLAN tag, pleased use the default priority and port VID to create a VLAN tag and insert it into the
data frame, otherwise the default VID will replace the VID of the ingress packets.
•
Use the default VID and priority to create a new VID
IGMP Snooping
IP host applies to join (or leave) multicast group to the neighboring router through IGMP (Internet Group
Management Protocol) protocol. IGMP Snooping is multicast constraining mechanism. It manages and
controls multicast group by snooping and analysis of the IGMP messages between the host and the
multicast device.
Work process of IGMP Snooping: the switch snoops messages between the host computer and the router
and tracks multicast information and the port applied for. When the switch snoops IGMP Report message
sent from the host computer to the router, the switch would add this port to multicast forwarding list; when
the switch snoops IGMP Leave message sent by the host computer, the router will send Group-Specific
Query message of this port. If other hosts need this multicast, then the rely IGMP Report message. If the
router doesn't get any reply from the hosts, the switch would delete this port from the multicast forwarding
list. The router will send IGMP Query message regularly, the switch will deletes the port from the multicast
forwarding list if it doesn't get the IGMP Report message from the host.
•
IGMP Snooping: Enable or disable IGMP snooping function
•
IGMP Query: Enable or disable IGMP query function
•
IGMP Query Interval: after enabling IGMP Query, the interval to check existing multicast members.
•
MAX Age: the maximum existing time of the members
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Configuring the System
30
