66 Rockwell Automation Publication 1783-UM003G-EN-P - December 2012
Chapter 3 Manage the Switch via the Device Manager Web Interface
With IGMP snooping, only ports that are members of specific IP
multicast groups receive multicast messages. The result is a more efficient
use of bandwidth.
Use the VLANs Advanced dialog box to change the RSTP and IGMP snooping
settings. To display this dialog box, choose Configure>VLANs from the Device
Manager Web interface menu, and then click Advanced on the VLANs dialog
box.