Hitachi GR2000 Series manual GR2K-GA-0014 147 Ver, 10BASE-T 1000BASE-LX 1000BASE-LH

Filtering/QoS Information

Table 1-72 Calculation Example of Excess Bandwidth

	Minimum	Maximum	Ratio of Excess	Excess Bandwidth
Traffic Type	Bandwidth	Bandwidth	Bandwidth
				(kps)
	Guarantee (kbit/s)	Limitation (kbit/s)	Assignment
-constant	-	192	0	0
-constant	-	10000	0	0
-guarantee	10000	-	1	19424x1/16=1214
-guarantee	20000	-	4	19424x4/16=4856
-constant	-	192	0	0
-guarantee	30000	-	4	19424x4/16=4856
-guarantee	10000	-	7	19424x7/16=8498
Not set.	-	192	0	0

* To set the band control (traffic designation) to a physical line in which a VLAN line is defined, do not change the maximum queue number. If a change is made, close the applicable RP using the GR2000 Operations Commands, Vol. 1, close rp command, and then release the closure using the free rp command.

Table 1-73 List of the Parameters When GR2000-1B and GR2000-2B Band Designation (Traffic Designation) is Made.

			Support
Item	Parameter		100BASE-T	1000BASE-SX	Description
		10BASE-T		1000BASE-LX
			X
				1000BASE-LH
Queue No.(*1)	-max_queue_number_4				Set the expanded
		4, 8, 64 queue
	-max_queue_number_8				number of queue.
	-max_queue_number_6
	4(*5)
Traffic type per	-constant	Fixed band			Set it when the fixed
queue					band is ensured.
	-guarantee	Variable band			Set it when the
					variable band is set.
Minimum guarantee	-min_rate	80kbit/s -	80kbit/s -	80kbit/s -	Set the minimum
band for each queue		10000kbit/s	10000kbit/s	590000kbit/s	guarantee band by
(*2) (*4)					queues.
Maximum	-peak_rate	80kbit/s -	80kbit/s -	80kbit/s -	Set the maximum
transmission band		10000kbit/s	10000kbit/s	590000kbit/s	transmission band by
for each queue					queues.
(*2) (*3) (*4)
Excess band	-weight	1 to 63			Distribute and
allocation ratio.					allocate the bands
					according to the ratio
					in which the excess
					band is set by
					queues.

*1: The router operates in four queues when the maximum number of queues is not set.

*2: The maximum error is about 2%.

*3: Set the maximum transmission band of a queue as described below when the queue traffic type is specified as guarantee. Minimum guarantee band for each queue ≤ Maximum transmission band for each queue ≤ Maximum limitation band of line

*4: The router operates under output priority control when the total number of guaranteed bands specified in each queue exceeds the line rate. The guaranteed band specified in each queue is a maximum transmission band when the traffic type is a fixed band. It is a minimum guarantee band when the traffic type is a variable band. The unspecified queue is 80 kbps.

*5:The maximum queue number can be 64 only when set to one line (line number zero).

GR2K-GA-0014	1-147
Ver. 07-02