User`s manual

EDS-828 Series Featured Functions
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Port Fixed VLAN List (Tagged)
Setting Description Factory Default
VID range from 1 to
4094
This field will be active only when selecting the “Trunk” port
type. Set the other VLAN ID for tagged devices that connect to
the “Trunk” port. Use commas to separate different VIDs.
None
Port Forbidden VLAN List
Setting Description Factory Default
VID range from 1 to
4094
This field will be active only when selecting the “Trunk” port
type. Set the VLAN IDs that will not be supported by this trunk
port. Use commas to separate different VIDs.
None
VLAN Table
In this table, you can review the VLAN groups that were created, Joined Access Ports, and Trunk Ports.
NOTE The physical network can have a maximum of 64 VLAN settings.
Using Multicast Filtering
Multicast filtering improves the performance of networks that carry multicast traffic. This section explains
multicasts, multicast filtering, and how multicast filtering can be implemented on your EDS-828.
The Concept of Multicast Filtering
What is an IP Multicast?
A multicast is a packet sent by one host to multiple hosts. Only those hosts that belong to a specific multicast
group will receive the multicast. If the network is set up correctly, a multicast can only be sent to an end-station
or a subset of end-stations on a LAN or VLAN that belong to the multicast group. Multicast group members can
be distributed across multiple subnetworks, so that multicast transmissions can occur within a campus LAN or
over a WAN. In addition, networks that support IP multicast send only one copy of the desired information
across the network until the delivery path that reaches group members diverges. To make more efficient use
of network bandwidth, it is only at these points that multicast packets are duplicated and forwarded. A
multicast packet has a multicast group address in the destination address field of the packet’s IP header.
Benefits of Multicast
The benefits of using IP multicast are that it:
• Uses the most efficient, sensible method to deliver the same information to many receivers with only one
transmission.