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.
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 Use VLANS for Traffic Segmentation on page 15).
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 a web browser.
3. In the address field of your web browser, enter the IP address of the switch.
If you do not know the IP address of the switch, see Access the switch using a web
browser on page 7.
The login page displays.
4. Enter the switch password.
User Manual
49
Manage Network Settings
48-Port Gigabit Ethernet Plus Switch with 2 SFP Ports Model GS750E
