10-1.2 VLAN Configuration
The section describes the VLAN configuration setting process integrated with IGMP Snooping
function. Each page shows up to 99 entries from the VLAN table, default being 20, selected
through the "entries per page" input field. When first visited, the web page will show the first
20 entries from the beginning of the VLAN Table. The first displayed will be the one with the
lowest VLAN ID found in the VLAN Table. The "VLAN" input fields allow the user to select the
starting point in the VLAN Table.
Web Interface
To configure the IGMP Snooping VLAN Configuration in the web interface:
1. Click Multicast, IGMP Snooping, and VLAN Configuration.
2. Click the Add New IGMP VLAN button to add a new row to the table.
3. Click the Apply button to save the setting.
4. To cancel the setting, click the Reset button to revert to previously saved values.
Figure 10-1.2: IGMP Snooping VLAN Configuration
Parameter descriptions:
Start from Vlan: Click to refresh the displayed table starting from the "VLAN" input fields.
Delete: Check to delete the entry. The designated entry will be deleted during the next save.
VLAN ID: Displays the VLAN ID (VID) of the entry.
Snooping Enabled: Enable the per-VLAN IGMP Snooping. Only up to 32 VLANs can be selected. .
IGMP Querier: Enable to join IGMP Querier election in the VLAN. Disable to act as an IGMP
Non-Querier.
Compatibility: Compatibility is maintained by hosts and routers taking appropriate
actions depending on the versions of IGMP operating on hosts and routers within a
network. The allowed selections are IGMP-Auto, Forced IGMPv1, Forced IGMPv2, Forced
IGMPv3. The default is IGMP-Auto.
IGMP v1 is specified in RFC-1112; it was the first widely-deployed version and the first version to
become an Internet Standard.
IGMP v2, specified in RFC-2236, added the ability for a host to signal desire to leave a multicast group.
IGMP v3, specified in RFC 3376, adds support for "source filtering", that is, the ability for a system to
report interest in receiving packets *only* from specific source addresses, or from *all but* specific
source addresses, sent to a particular multicast address.
Rv: Robustness Variable. The Robustness Variable allows tuning for the expected packet loss on a
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