NETGEAR GS750E User Manual page 15

48-Port Gigabit Ethernet Smart Managed Plus Switch Model GS750E
5. Select System > Multicast.
6. Select the IGMP Snooping Status Enable radio button.
By default, the Enable radio button is selected.
7. Make sure that a VLAN ID between 1 and 4094 is stated in the VLAN ID Enabled for IGMP Snooping
field.
You can specify a VLAN for IGMP snooping only if you enabled port-based or 802.1Q-based VLANs
(see Use VLANS for Traffic Segmentation
IGMP snooping functions only on the VLAN that is specified in the VLAN ID Enabled for IGMP Snooping
field.
8. (Optional) Select the Validate IGMPv3 IP header Enable radio button.
Some network devices might not conform to the IGMPv3 standard. When the Validate IGMPv3 IP header
option is enabled, IGMP messages are required to include TTL = 1, ToS Byte = 0xC0 (Internetwork
Control), and the router alert IP option (9404) must be set. Otherwise, the packets are ignored.
9. (Optional) Select the Block Unknown MultiCast Address Enable radio button.
When this feature is enabled, multicast packets are forwarded only to the ports that are in the multicast
group learned from IGMP snooping. All unknown multicast packets are dropped.
10. (Optional) Select a port to be the dedicated IGMP snooping static router port if no IGMP query exists
in the network for the switch to discover the router port dynamically.
Select one of the following IGMP Snooping Static Router Port radio buttons:
• Auto. If the switch receives a query message, the switch configures the router port or ports
dynamically. This is the default setting.
• Any. IGMP Join and Leave packets are sent to every port of the switch.
• Static. Select one port as the dedicated IGMP snooping static router port by selecting the check
box that is associated with the port number. All IGMP Join and Leave reports are forwarded to the
selected port.
11. Click the Apply button.
Your settings are saved.
on page 23).
Manage Network Settings
15