N-Tron 9000 Series - Manual (Page 52)

5/17/2007 page 52 of 138
IGMP – RFilter
The ‘rfilter’ (Router Multicast Data Filter) function allows you to choose whether or not DATA frames
with KNOWN group multicast addresses are sent to the ‘router’ ports (links to other switches). Control
packets (Join, Leave) will be sent to the router(s) regardless of this setting. “KNOWN” is known from
dynamic IGMP Snooping operations. The factory default is that the Router Multicast Data Filter is disabled
for all ports, so any router ports do get DATA frames with KNOWN multicast destination addresses. If
rfilter is enabled router ports do NOT get DATA frames with KNOWN multicast destination addresses
unless a join to a specific multicast address has been received on that port. ( Joins over-ride rfilter.) Rfilter
can be set for individual ports: any, all, or none. For each port rfilter will have an impact only if that port is
manually or dynamically chosen as a router port.
Default configuration: