Chapter 61 Switching
GS2220 Series User’s Guide
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61.13 IG MP Sno o ping VLAN
The Switch can perform IGMP snooping on up to 16 VLANs. You can configure the Switch to
automatically learn multicast group membership of any VLANs. The Switch then performs IGMP
snooping on the first 16 VLANs that send IGMP packets. This is referred to as auto mode. Alternatively,
you can specify the VLANs that IGMP snooping should be performed on. This is referred to as fixed
mode. In fixed mode the Switch does not learn multicast group membership of any VLANs other than
those explicitly added as an IGMP snooping VLAN.
Click Switc hing > Multic a st in the navigation panel. Click the IG MP Sno o ping VLAN tab to display the
screen as shown.
Fig ure 371 Switching > Multicast > IGMP Snooping VLAN
The following table describes the labels in this screen.
Table 259 Switching > Multicast > IGMP Snooping VLAN
LABEL DESC RIPTIO N
Mode Select a uto to have the Switch learn multicast group membership information of any VLANs
automatically.
Select fixe d to have the Switch only learn multicast group membership information of the
VLANs that you specify below.
In either a uto or fixe d mode, the Switch can learn up to 16 VLANs.
The Switch drops any IGMP control messages which do not belong to these 16 VLANs.
You must also enable IGMP snooping in the Switc hing > Multic a st > IG MP Sno o ping screen first.
Apply Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Sa ve link on the top navigation panel to
save your changes to the non-volatile memory when you are done configuring.
Cancel Click Ca nc e l to begin configuring this screen afresh.
VLAN Use this section of the screen to view and add or edit VLANs upon which the Switch is to
perform IGMP snooping.
Select an entry’s check box to select a specific entry. Otherwise, select the check box in the
table heading row to select all entries.
Index This is the index number of the IGMP snooping VLAN entry in the table. Click on an index
number to view more details or change the settings.
Name This field displays the descriptive name for this VLAN group.
VID This field displays the ID number of the VLAN group.
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