LevelOne GSW-2600TXM manual 129

Forward	15	The maximum time (in seconds) the root device will wait before
Delay		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].
Maximum	20	The maximum time (in seconds) a device can wait without
(Message)		receiving a configuration message before attempting to
Age		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	Disabled	GARP Multicast Registration Protocol (GMRP) allows network
		devices to register endstations with multicast groups.
		If GMRP is globally enabled for the switch, then you can
		individually enable or disable GMRP for a specific port. See
		“VLAN Port Configuration” on chapter 3.
		IGMP and IGMP Snooping also provide multicast filtering. For
		multilayer mode, the full IGMP protocol set is automatically
		enabled / disabled along with DVMRP. (See “IGMP Protocol”
		on chapter 4, “Configuring DVMRP” on chapter 3, and
		“Configuring IGMP Snooping” on chapter 3.)
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
		“VLAN Port Configuration” on chapter 3.
Priority	4	This switch supports Quality of Service (QoS) by using two
Threshold*		priority queues, with Weighted Fair Queuing for each port. Up
		to 8 separate traffic classes are defined in IEEE 802.1p.
		Therefore, any packets with a priority equal to or higher than
		this threshold are placed in the high priority queue.
(Address)	300	Timeout period in seconds for aging out dynamically learned
Aging Time		forwarding information.
		Range: 10 - 415 seconds

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