Cisco SD208T-NA Administration Manual page 199

Configuring Multicast Forwarding
Configuring IGMP Snooping
STEP 1
STEP 2
STEP 3
STEP 4
Cisco Small Business 200 Series Smart Switch Administration Guide
When IGMP Snooping is enabled globally or on a VLAN, all IGMP packets are
forwarded to the CPU. The CPU analyzes the incoming packets, and determines
the following:
• Which ports are asking to join which Multicast groups on what VLAN.
• Which ports are connected to Multicast routers (Mrouters) that are
generating IGMP queries.
• Which ports are receiving PIM, DVMRP, or IGMP query protocols.
These are displayed on the
Ports, asking to join a specific Multicast group, issue an IGMP report that specifies
which group(s) the host wants to join. This results in the creation of a forwarding
entry in the Multicast Forwarding Data Base.
To enable IGMP Snooping and identify the switch as an IGMP Snooping Querier on
a VLAN:
Click Multicast > IGMP Snooping. The
Enable or disable the IGMP Snooping status.
When IGMP Snooping is enabled globally, the device monitoring network traffic
can determine which hosts have requested to receive Multicast traffic.
The switch only performs IGMP Snooping if both IGMP snooping and Bridge
Multicast filtering are enabled.
Select a VLAN, and click Edit. The
Enter the parameters.
• VLAN ID—Select the VLAN ID on which IGMP snooping is defined.
• IGMP Snooping Status—Enable or disable the monitoring of network traffic
for the selected VLAN.
• Operational IGMP Snooping Status—Displays the current status of the
IGMP Snooping for the selected VLAN.
• MRouter Ports Auto Learn—Enable or disable auto learning of the ports to
which the Mrouter is connected.
• Query Robustness—Enter the Robustness Variable value to be used if this
switch is the elected querier.
IGMP Snooping
page.
IGMP Snooping
Edit IGMP Snooping
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