LevelOne GSW-2600TXM manual Configuring Igmp Snooping

Port

Port entries may be marked as:

- : (Normal) Uses GVRP to determine port membership.

S : (Static) Adds port as a static entry. GVRP protocol messages are still forwarded through this port.

R : (Registration Fixed) Adds port as a static entry. GVRP protocol is disabled.

X : (Forbidden) Disables GVRP for this VLAN on the specified port. If a removed port is no longer assigned to any other group as an untagged port, it will automatically be assigned to VLAN group 1 as untagged.

Note:

Use the <Next Page> and <Prev Page> buttons to scroll through the table. To display a specific page, set the page number in the Page field and select <Apply>. To modify a VLAN group, highlight the entry in the table and select Enter. To add a VLAN group, select <Add>.

2.5.5.Configuring IGMP Snooping

Multicasting is used to support real-time applications such as videoconferencing or streaming audio. A multicast server does not have to establish a separate connection with each client. It merely broadcasts its service to the network, and any hosts which want to receive the multicast register with their local multicast switch / router. Although this approach reduces the network overhead required by a multicast server, the broadcast traffic must be carefully filtered at every multicast switch / router it passes through to ensure that traffic is only passed on to the hosts which subscribed to this service.

This switch uses IGMP (Internet Group Management Protocol) Snooping to monitor any attached hosts which want to receive a specific multicast service. It looks up the IP Multicast Group used for this service, and adds to it any port that received a similar request .

You can use the IGMP Snooping Configuration screen to configure multicast filtering as shown below.

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