10-1.4 Group Information
After you complete setting the IGMP Snooping function, you can view the IGMP Snooping
Group Information. Entries in the IGMP Group Table are shown on this page. The IGMP Group
Table is sorted first by VLAN ID, and then by group. When the end is reached the text "No more
entries" is shown in the displayed table.
Group Member Behavior: in order to be compatible with older version routers, IGMPv3 hosts
must operate in version 1 and version 2 compatibility modes. IGMPv3 hosts MUST keep state
per local interface regarding the compatibility mode of each attached network. A host's
compatibility mode is determined from the Host Compatibility Mode variable which can be in
one of three states: IGMPv1, IGMPv2 or IGMPv3. This variable is kept per interface and
depends on the version of General Queries heard on that interface as well as the older querier
present timers for the interface.
Web Interface
To display the IGMP Snooping Group Information in the web interface:
1. Click Multicast, IGMP Snooping, and Group Information.
2. Specify how many entries to show in one page.
3. To auto-refresh the information click the “Auto-refresh” button.
4. Click “Refresh” to refresh an entry of the IGMP Snooping Groups Information.
5. Click Previous or Next to change pages.
Figure 10-1.4: IGMP Snooping Groups Information
Parameter descriptions:
Navigating the IGMP Group Table
Each page shows up to 99 entries from the IGMP Group table, default being 20, selected through the
"entries per page" input field. When first visited, the web page shows the first 20 entries from the
beginning of the IGMP Group Table. The "Start from
VLAN", and "group" input fields let you select the
starting point in the IGMP Group Table.
Search: You can search for the information that you want to see.
Show entries: You can choose how many items you want to view.
VLAN ID: VLAN ID of the group.
Groups: Group address of the group displayed.
Port Members: Ports under this group.
Buttons
Auto-refresh : Check this box to refresh the page automatically every 3 seconds.
Refresh : Click to refresh the page immediately.
Next : Updates the system log entries, turn to the next page.
Previous : Updates the system log entries, turn to the previous page.
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