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ProSafe Unmanaged Plus Switch Configuration Utility User Guide
MultiCast
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. Host groups are identified by class D IP addresses, 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 prevents the switch
from broadcasting the traffic to all ports and possibly affecting network performance.
To enable or disable IGMP snooping:
•
Select Disable or Enable for IGMP Snooping Status and click Apply.
or
•
You can also change the VLAN for which the IGMP Snooping to be enabled by entering a
valid VLAN ID for the field "VLAN ID Enabled for IGMP Snooping"; and clicking Apply.
This field is greyed out if VLAN is not enabled.
Validate IGMPv3 IP header:
Some of the Network devices may not conform to the IGMPv3 standard. When 'Validate
IGMPv3 IP header' option is enabled, IGMP messages are required to have TTL = 1, ToS
Byte = 0xC0 (Internetwork Control), and router alert IP option (9404) set; otherwise, the
packets will be ignored.
Block Unknown MultiCast Address:
When enabled, multicast packets are forwarded only to the ports that are in the Multicast
group learnt from IGMP snooping. All unknown multicast packets are dropped.
20 |
Chapter 2: System Configuration
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