Multicast Vlan - D-Link DGS-3120-24TC Product Manual

xStack® DGS-3120 Series Managed Switch Web UI Reference Guide
VID List
Port List
Click the Find button to locate a specific entry based on the information entered.
Click the View All button to display all the existing entries.
Click the Packet Statistics
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Click the Clear Counter button to clear all the information displayed in the fields.
Click the Refresh button to refresh the display table so that new information will appear.
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Multicast VLAN

In a switching environment, multiple VLANs may exist. Every time a multicast query passes through the Switch, the
switch must forward separate different copies of the data to each VLAN on the system, which, in turn, increases
data traffic and may clog up the traffic path. To lighten the traffic load, multicast VLANs may be incorporated.
These multicast VLANs will allow the Switch to forward this multicast traffic as one copy to recipients of the
multicast VLAN, instead of multiple copies.
Regardless of other normal VLANs that are incorporated on the Switch, users may add any ports to the multicast
VLAN where they wish multicast traffic to be sent. Users are to set up a source port, where the multicast traffic is
entering the switch, and then set the ports where the incoming multicast traffic is to be sent. The source port cannot
be a recipient port and if configured to do so, will cause error messages to be produced by the switch. Once
properly configured, the stream of multicast data will be relayed to the receiver ports in a much more timely and
reliable fashion.
Restrictions and Provisos:
The Multicast VLAN feature of this Switch does have some restrictions and limitations, such as:
1. Multicast VLANs can be implemented on edge and non-edge switches.
2. Member ports and source ports can be used in multiple ISM VLANs. But member ports and source ports
cannot be the same port in a specific ISM VLAN.
3. The Multicast VLAN is exclusive with normal 802.1q VLANs, which means that VLAN IDs (VIDs) and VLAN
Names of 802.1q VLANs and ISM VLANs cannot be the same. Once a VID or VLAN Name is chosen for
any VLAN, it cannot be used for any other VLAN.
Specify a list of VLANs to be displayed.
Specify a list of ports to be displayed.
link to view the MLD Snooping Counter Settings for the specific entry.
link, the following page will appear:
Figure 4–64 Browse MLD Snooping Counter window
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