SMC Networks TigerStack 100 1000BASE-X - Manual (Page 124)

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ANAGEMENT
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Bridge Settings
Parameter Description
Traffic Classes* Multiple traffic classes are supported by this switch as
indicated under Bridge Capabilities. However, you can
disable this function by setting this parameter to False.
GMRP* GARP Multicast Registration Protocol (GMRP) allows
network devices to register endstations with multicast
groups.
IGMP Snooping is currently used by this switch to provide
automatic multicast filtering.
GVRP* GARP VLAN Registration Protocol (GVRP) defines a way
for switches to exchange VLAN information in order to
register necessary VLAN members on ports across the
network. This function should be enabled to permit VLANs
groups which extend beyond the local switch.
* These functions are not available for the current firmware release.