Hitachi GR2000 Series manual Default length of each queue, Queue number Default queue length

Filtering/QoS Information

Table 1-100 Parameters for each queuing mode

			Supported
			specifications
Item		Parameter	1000BASE-SX	Description
			1000BASE-LX
			1000BASE-LH
			NEB1G-2D
4WFQ	Queue mode	4wfq	4WFQ	Sets weighted fair queuing (4WFQ).
	Maximum send	<Rate>	1 to 100%	Sets maximum send bandwidth for
	bandwidth			each queue.
	Queue length	<Length>	0 to 4000(*1)	Set length of each queue

(*1) If queue length is not set in each queue, default 0 is assigned. Table 1-101, Default length of each queue, indicates the default length of each queue.

Table 1-101 Default length of each queue

Queue number	Default queue length
1	400
2	300
3	250
4	200

It is possible to change the threshold at which discard begins in NE1G-2D in two stages. The discard threshold is set by the queue length of shaper send information. Correspondence between packet priority and discard threshold is indicated below.

*High priority packets (*1): Discard if queued packets exceed queue length

*Low priority packets (*2): Discard if queued packets exceed one-half the queue length (*1): Packets in which 1 is the lowest bit of user priority

(*2): Packets in which 0 is the lowest bit of user priority

Examples

1. Setting parameters:

Setting VLAN1 priority control in outbound priority control

Ver. 07-02

GR2K-GA-0014600400200(config)#shaper{}￿rate}limitedshVLAN1akaperowshaperquuingratelimitedrate{limit20000quueedprorityqueueingVLAN1800VLAN1peak600_rate400200000;priority8001-215