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Manage Network Settings
13
NETGEAR ProSAFE Plus Configuration Utility
7. Select the IGMP Snooping Status Enable radio button.
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, for some models only) Select an option from the IGMP Snooping Static Router
Port menu.
You can 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. After a
port is selected as the static router port, all IGMP Join and Leave reports are forwarded to
the port.
11. Click the APPLY button.
Your settings are saved.
Specify a VLAN for IGMP Snooping
You can specify a VLAN for IGMP snooping only if you enabled port-based or 802.1Q-based
VLANs (see Chapter 4, Use VLANS for Traffic Segmentation).
To specify a VLAN for IGMP snooping:
1. Connect your computer to the same network as the switch.
You can use a WiFi or wired network connection, or connect directly to a switch that is
off-network using an Ethernet cable.
2. Launch the ProSAFE Plus Utility using the desktop icon or tile.
The Switch Selection page displays a list of Web Managed (Plus) switches that it
discovers on the local network.
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