Configuring Switching
174
S3300 Smart Managed Pro Switch
IGMP Snooping VLAN Configuration
Use the IGMP Snooping VLAN Configuration screen to configure IGMP snooping settings for
VLANs on the system.
To configure IGMP snooping settings for VLANs:
1. Select Switching> Multicast > IGMP Snooping > IGMP Snooping VLAN Configuration.
2. Enter the VLAN ID in the appropriate field and configure the IGMP snooping values:
• Fast Leave Admin Mode. Enable or disable the IGMP snooping Fast Leave Mode for
the specified VLAN ID. Enabling fast-leave allows the switch to immediately remove
the Layer 2 LAN interface from its forwarding table entry upon receiving an IGMP
leave message for that multicast group without first sending out MAC-based general
queries to the interface.You should enable fast-leave admin mode only on VLANs
where only one host is connected to each layer 2 LAN port. This prevents the
inadvertent dropping of the other hosts that were connected to the same layer 2 LAN
port but were still interested in receiving multicast traffic directed to that group. Also,
fast-leave processing is supported only with IGMP version 2 hosts.
• Host Timeout. Sets the value for group membership interval of IGMP snooping for
the specified VLAN ID. The valid range is (Maximum Response Time + 1) to 3600
seconds.
• Maximum Response Time. Sets the value for maximum response time of IGMP
snooping for the specified VLAN ID. Valid range is 1 to 25. The configured value must
be less than the Group Membership Interval. The default is 10 seconds.
• MRouter Timeout. Enter the amount of time that a switch waits to receive a query on
the VLAN before removing it from the list of VLANs with multicast routers attached.
Enter a value between 0 and 3600 seconds. The default is 0 seconds, which means
there is no expiration.
• Query Mode. Enable or disable the IGMP Querier Mode for the specified VLAN ID.
• Query Interval. Enter the value for IGMP Query Interval for the specified VLAN ID.
The valid range is 1–1800 seconds. The default is 60 seconds.
3. Click the Add button.
To disable IGMP snooping on one or more VLANs:
1. Select the check box next to each VLAN ID on which IGMP snooping is to be disabled.
2. Click the Delete button.
Description The text description of this multicast table entry. Possible values are
Management Configured, Network Configured, and Network Assisted.
Interface The list of interfaces that are designated for forwarding (Fwd) and filtering (Flt)
for the associated address.
Table 61. IGMP snooping table information (continued)
Field Description
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