IGMP/VLAN Configuration Screen
Layer 3 Extensions Menu Screens
10-3
Menu Descriptions
Refer to
Table 10-1
for a functional description of each menu item (at this time there is only one
menu item).
10.2 IGMP/VLAN CONFIGURATION SCREEN
When to Use
The IGMP/VLAN Configuration screen,
Figure 10-2
, is used to enable or disable IGMP (Internet
Group Management Protocol, RFC 2236) on selected VLANs, or globally on all VLANs that are
available.
IGMP Snooping provides a solution for handling multicast streams in layer 3 routers. IGMP is for
hosts on multi-access networks to inform locally attached switches of their Multicast group
membership information. This is performed by hosts multicasting IGMP Host Membership
Reports. Multicast switches listen for these messages and then pass them to other switches. This
allows distribution trees to be formed to deliver multicast datagrams.
Information from the IGMP packets is used to send the multicast stream only to the end stations
that request it.
IGMP is enabled or disabled by VLAN, not port by port.
Table 10-1
Layer 3 Extensions Menu Screen Menu Item Descriptions
Menu Item
Screen Function
IGMP/VLAN
CONFIGURATION
Used to enable or disable IGMP (Internet Group Management
Protocol) on selected VLANs. For details, refer to
Section 10.2
.
NOTE: Certain versions of firmware will not allow the switch to be a querier. Please
check your release notes for further information. Refer to RFC 2236, Section 8, for more
information on IGMP.
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