Hitachi GR2000 Series Range of value 0 to, Relationship Between Number of Queues and Priority

Hitachi Gigabit Router GR2000 Series Enhanced Version Configuration Commands, Vol. 2

Range of value: 0 to 7.

[-priorityMakes the<Noflow.>]control[-discard:function<No.>]effective by specifying the output priority and queuing priority. Sets the priority in <No.>. The priority parameter is used as the output priority in the case of output priority control and as the queue number in the case of minimum band assurance. If the output line is an ATM line, it sets the value of the cell loss priority indication (CLP bit) of the cells transmitting in VC using either the "output" priority or the "queuing" priority. To set the cell loss indication bit, refer to the parameters defined in the GR2000 Configuration Commands, (universal CLI) Vol. 1, vc (VC information)." If the VC’s service category is GRR or GFR2, select the "queuing" priority from the VC priority queue. If the VC’s service category is GFR2, set the output priority from the VC

queue. For the queuing and output priority of VC priority queuing, refer to the GR2000 Applications Guide.

When setting this parameter, it is not possible to -replace_dscp or -dscp_map.

Default:	priority: 4
	4
Range of value:	-priority	>: 1 to 1000

(In case of the output priority control, the greater the value of the output priority, the more preferentially the packet is issued.)

-discard <No.>: 1 to 4.

(The smaller the value of the queuing priority, the more preferentially the packet is discarded.)

The ranges for the output priority (priority) and the queuing priority (discard) vary depending on the setting conditions.

Table 1-43 Relationship Between Number of Queues and Priority

Setting Condition		Range
Interface Using	No. of Queue in Output	Output Priority (*1)	Queuing Priority
this List	Interface
Input side	--	1-8	1-4
Output side	4	1-4	1-4
Output side	8	1-8	1-4
Output side	16	1-16	1-4
Output side	32	1-32	1-4
Output side	64	1-64	1-4
Output side	250	1-250	1-4 (*2)
Output side	1000	1-1000	1-4 (*2)

*1: If value outside the range is set in output priority, the setting contents are nullified.

*2: If the QoS attribute of the output interface is the minimum band assurance (specified by kbps), the flow control is executed as follows:

• Queuing priority 1 and 2: Flow control is executed at queuing priority 2.

• Queuing priority 3 and 4: Flow control is executed at queuing priority 4.

[-groupDesignates<No.>]the[ROUTEgroup-OS6B]number to be outputted when the output line transmission

control is the group band control relative to the Line. Setting is possible only

1-72	GR2K-GA-0014
	Ver. 07-02