Allied Telesis AT-S26 - Manual (Page 52)

Managing a Switch
52
Enabling or Disabling IGMP Snooping
The Ethernet switch supports the Internet Group Management Protocol
(IGMP) snooping feature to take advantage of performance
improvements provided by IP multicasting. Allied Telesyn AT-S26
implementation supports IGMP Version 1.
Through the IGMP snooping feature, the switch obtains information
about multicast groups by looking at IGMP packets sent from hosts and
routers, and also by looking at Distance Vector Multicast Routing
Protocol (DVMRP) packets. IGMP packets provide information about
nodes joining multicast groups, while DVMRP packets provide
information about delivery paths. With this information, the switch
builds membership groups of ports for each IP multicast address.
To enable or disable IGMP snooping, perform the following procedure:
1. From the Omega Main Menu, select System configuration.
The System Configuration menu shown in Figure 8 on page 43 is
displayed.
2. From the System Configuration menu, select System switch
configuration.
The System Switch Configuration menu in is displayed.
Figure 16 Switch Configuration Menu
Note
The menu selection Port Trunking in the 10/100M Speed Port is
available only if the switch contains an expansion module that has
multiple 100 Mbps or 10/100 Mbps ports. For information on port
trunking, refer to Chapter 3, Configuring the Ports.
System Switch Configuration Menu
IGMP Snooping configuration
Port Trunking in the 10/100M Speed Port
Return to System Configuration Menu...