GE T1000 Technical Manual page 175

Chapter 7 – Configuration
REASON SWITCHES-TM-EN-3
means function enabled, and checkbox empty
means disabled;

IGMP SSM Range: indicates Source-Specific
Multicast (SSM) range. SSM function is used when
multicast listener should receive packets from a
given source only, and not all multicast sources
at a given LAN, improving security and reducing
network demands. SSM address will allow SSM-
aware hosts and routers to run SSM services.
Address must be entered in a dotted decimal
format, and mask length is represented as mask
length bits;

Leave Proxy Enabled: enable IGMP leave proxy,
to avoid
messages to the router side port. Checkbox
selected means function enabled, and checkbox
empty means disabled;

Proxy Enabled: enable IGMP proxy, to avoid
forwarding
messages to the router side port. In this mode
switch will operate to the router side as a host,
exchanging host leave and join messages.
Checkbox selected means function enabled, and
checkbox empty means disabled.
Port Related Configuration: indicates basic port IGMP

snooping configuration. Possible configuration is as
follows:

Port: shows the ports to be configured at this
row;

Router Port: enable IGMP Snooping router port.
Router port is the port at the switch that is
connected to multicast messages source (the
layer 3 multicast devices or IGMP querier), that is,
the source side LAN port. Checkbox selected
means port selected is the router port;

Fast Leave: enable port's multicast snooping fast
leave process. If enabled, switch will stop
sending multicast data to a given client as soon
as the Leave message is received from client.
Otherwise, switch would wait the Multicast
source Membership Query message to be
answered by the client. Checkbox selected
means function enabled, and checkbox empty
means disabled;
GE Reason Switches
forwarding unnecessary
unnecessary join and
leave
leave
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