VLAN Status
Use the VLAN Status page to enable or disable
snooping on system VLANs and to view and
configure per-VLAN IGMP snooping settings. Only VLANS that are enabled for IGMP snooping appear
in the table.
To access this page, click
Switching
>
IGMP Snooping
>
VLAN Status
in the navigation menu.
Use the buttons to perform the following tasks:
•
To enable IGMP snooping on a VLAN, click
Add
and configure the settings in the available fields.
•
To change the IGMP snooping settings for an IGMP-snooping enabled VLAN, select the entry with
the settings to change and click
Edit
.
•
To disable IGMP snooping on one or more VLANs, select each VLAN to modify and click
Remove
.
You must confirm the action before IGMP snooping is disabled on the selected VLANs. When IGMP
snooping is disabled, the VLAN entry is removed from the table, but the VLAN itself still exists on
the system.
Table 202: IGMP Snooping VLAN Status Fields
Field
Description
VLAN ID
The VLAN associated with the rest of the data in the row. When enabling IGMP
snooping on a VLAN, use this menu to select the desired VLAN. Only VLANs that
have been configured on the system and are not already enabled for IGMP
snooping appear in the menu. When modifying IGMP snooping settings, this
field identifies the VLAN that is being configured.
Admin Mode
The administrative mode of IGMP snooping on the VLAN. IGMP snooping must
be enabled globally and on an VLAN for the VLAN to be able to snoop IGMP
packets to determine which network segments should receive multicast packets
directed to the group address.
Fast Leave Admin Mode
The administrative mode of Fast Leave on the VLAN. If Fast Leave is enabled, the
VLAN can be immediately removed from the Layer 2 forwarding table entry
upon receiving an IGMP leave message for a multicast group without first
sending out MAC-based general queries.
Group Membership Interval
(Seconds)
The number of seconds the VLAN should to wait for a report for a particular
group on the VLAN before the IGMP snooping feature deletes the VLAN from
the group.
Max Response Time (Seconds) The number of seconds the VLAN should wait after sending a query if does not
receive a report for a particular group. The specified value should be less than
the Group Membership Interval.
Multicast Router Expiration
Time (Seconds)
The number of seconds the VLAN should wait to receive a query before it is
removed from the list of VLANs with multicast routers attached.
Report Suppression Mode
The IGMPv1 and IGMPv2 report suppression mode. The device uses IGMP report
suppression to limit the membership report traffic sent to multicast-capable
routers. When this mode is enabled, the device does not send duplicate reports
to the multicast router. Note that this mode is supported only when the multicast
query has IGMPv1 and IGMPv2 reports. This feature is not supported when the
query includes IGMPv3 reports. The options are as follows:
•
Enabled – Only the first IGMP report from all hosts for a group IGMP report is
forwarded to the multicast routers.
•
Disabled – The device forwards all IGMP reports from all hosts in a multicast
group to the multicast routers.
Configuring Switching Information
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