Internet Group Management Protocol Snooping - NETGEAR S3600 Series User Manual

S3600 Series 8- or 16-Port 10G/Multi-Gigabit Ethernet Smart Switch with 2 SFP+ Ports
• Enter your device admin password.
• If you previously managed the switch through the Insight Cloud Portal or Insight
app, enter the Insight network password for the last Insight network location.
For information about the credentials, see Credentials for the device UI on page 34.
4. Click the Login button.
The Dashboard page displays.
5. Select Switching > Multicast > Multicast Status.
The Multicast Status page displays.
6. To refresh the page, click the Refresh button.
The following table describes the MFDB Statistics section on the page.
Table 49. MFDB statistics information
Field
Max MFDB Table Entries
Most MFDB Entries Since Last
Reset
Current Entries
Internet Group Management
Protocol snooping
Internet Group Management Protocol (IGMP) snooping allows a switch to forward
multicast traffic intelligently. Multicast IP traffic 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.
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.
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
Configure Multicast
Definition
The maximum number of entries that the MFDB can hold
The largest number of entries that were present in the MFDB since the
switch was last reset
The current number of entries in the MFDB
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