Planet Technology WGS3-2620, WGS3-404 manual 56

Forward Delay	15	The maximum time (in seconds) the root device will wait before
		changing states (that is, listening to learning to forwarding). This delay
		is required because every device must receive information about
		topology changes before it starts to forward frames. In addition, each
		port needs time to listen for conflicting information that would make it
		return to a blocking state; otherwise, temporary data loops might result.
		The maximum value is 30.
		The minimum value is the higher of 4 or
		[(Max. Message Age / 2) + 1].
Max (Message) 20		The maximum time (in seconds) a device can wait without receiving a
Age		configuration message before attempting to reconfigure. All device
		ports (except for designated ports) should receive configuration
		messages at regular intervals. Any port that ages out STA information
		(provided in the last configuration message) becomes the designated
		port for the attached LAN. If it is a root port, a new root port is selected
		from among the device ports attached to the network.
		The minimum value is
		the higher of 6 or [2 x (Hello Time + 1)].
		The maximum value is
		the lower of 40 or [2 x (Forward Delay - 1)].
GMRP*1	Disabled	GARP Multicast Registration Protocol (GMRP) allows network devices
		to register end stations with multicast groups. If GMRP is globally
		enabled for the switch, then you can individually enable or disable
		GMRP for a specific port. See “4.5.4.1 VLAN Port Configuration”.
		IGMP and IGMP Snooping also provide multicast filtering. For
		multilayer mode, the full IGMP protocol set is automatically
		enabled/disabled along with DVMRP. (See “6.4.2 IGMP Protocol”,and
		“4.5.5 Configuring IGMP Snooping”.)
GVRP	Disabled	GARP VLAN Registration Protocol (GVRP) defines a way for switches
		to exchange VLAN information in order to register VLAN members on
		ports across the network. This function should be enabled to permit
		automatic VLAN registration, and to support VLANs which extend
		beyond the local switch.
		If GVRP is globally enabled for the switch, then you can individually
		enable or disable GVRP for a specific port. See “4.5.4.1 VLAN Port
		Configuration”.
Priority	4	WGS3-2620 supports Quality of Service (QoS) by using two priority
		queues, with Weighted Fair Queuing for each port. Up to 8 separate

Threshold*1traffic classes are defined in IEEE 802.1p. So any packets with a priority equal to or higher than this threshold are placed in the high priority queue. You can use “4.5.4.1 VLAN Port Configuration” to configure the default priority for each port.

WGS3 Layer 3 Switch User’s Manual - 48 -