HP R110, Руководство по настройке и администрированию

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IGMP settings 49
Enable IGMP Snooping
Enables the feature that blocks unnecessary IP multicast traffic from flooding VLAN ports
without a specific multicast membership. This feature is based on snooping IGMP join/leave
messages from VLAN ports to update the bridging forwarding database. IGMP Snooping is
extremely useful in saving bandwidth of low-speed interfaces to improve the network utilization.
Enable DHCP Server
Enables the automatic assignment of IP addresses to clients in the VLAN.
IP Pool Starting/Ending Address
Sets the IP addresses to use for automatic assignment. You can click Auto IP Range to
automatically set a valid range of pool addresses.
Lease Time
The time interval that clients can use assigned IP addresses.
VLAN ID
The ID number of the VLAN.
IGMP settings
The Internet Group Management Protocol (IGMP) is a communications protocol used by hosts
and adjacent routers on IP networks to establish multicast group memberships. IGMP can be
used for one-to-many networking applications, such as on line streaming video and gaming,
and allows more efficient use of resources when supporting these types of applications.
This page includes the following settings:
Enable IGMP Proxy
IGMP proxy actively filters IGMP packets in order to reduce the load on the multicast router.
Join and leave messages heading upstream to the router are filtered so that only the minimal
quantity of information is sent.
Enable IGMP Snooping
IGMP snooping is the process of listening to Internet Group Management Protocol (IGMP)
network traffic. The feature allows a network switch to listen in on the IGMP conversation
between hosts and routers. By listening to these conversations, the switch maintains a map of
which links need which IP multicast streams. Multicast traffic can be filtered from the links that
do not need them, and thus control the ports that receive specific multicast traffic.