Netgear GS752TP - 52PT GE POE SMART SWITCH Guia Do Administrador
Configuring Switching Information
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GS752TP, GS728TP, and GS728TPP Gigabit Smart Switches
The following screen displays:
2.
Globally enable or disable the Auto-Video administrative mode for the switch by selecting
Enable or Disable next to the Auto-Video Status radio button.
The Auto-Video VLAN field shows the number of auto-configured IGMP snooping
VLANs.
VLANs.
3.
Click APPLY to send the updated configuration to the switch.
Configuration changes take place immediately.
IGMP Snooping
Internet Group Management Protocol (IGMP) snooping is a feature that allows a switch to
forward Multicast traffic intelligently on the switch. Multicast IP traffic is traffic that is destined
to a host group. Class
forward Multicast traffic intelligently on the switch. Multicast IP traffic is traffic that is destined
to a host group. Class
D IP addresses identify host groups, which range from 224.0.0.0 to
239.255.255.255. Based on the IGMP query and report messages, the switch forwards traffic
only to the ports that request the multicast traffic. This action prevents the switch from
broadcasting the traffic to all ports and possibly affecting network performance.
only to the ports that request the multicast traffic. This action prevents the switch from
broadcasting the traffic to all ports and possibly affecting network performance.
A traditional ethernet network can be separated into different network segments to prevent
placing too many devices onto the same shared media. Bridges and switches connect these
segments. When a packet with a broadcast or Multicast destination address is received, the
switch forwards a copy into each of the remaining network segments in accordance with the
IEEE MAC Bridge standard. Eventually, the packet is made accessible to all nodes
connected to the network.
segments. When a packet with a broadcast or Multicast destination address is received, the
switch forwards a copy into each of the remaining network segments in accordance with the
IEEE MAC Bridge standard. Eventually, the packet is made accessible to all nodes
connected to the network.
This approach works well for broadcast packets that are intended to be seen or processed by
all connected nodes. In the case of multicast packets, however, this approach could lead to
less efficient use of network bandwidth, particularly when the packet is intended for only a
few nodes. Packets are flooded into network segments where no node has any interest in
receiving the packet. While nodes rarely incur any processing overhead to filter packets
addressed to unrequested group addresses, they are unable to transmit new packets onto
all connected nodes. In the case of multicast packets, however, this approach could lead to
less efficient use of network bandwidth, particularly when the packet is intended for only a
few nodes. Packets are flooded into network segments where no node has any interest in
receiving the packet. While nodes rarely incur any processing overhead to filter packets
addressed to unrequested group addresses, they are unable to transmit new packets onto