Hitachi GR2000 Series manual Relationship Between Number of Queues and Priority

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

cell transmitted by VC to zero when the queuing priority is three or four, and to one when the queuing priority is one or two. For setting the cell loss indication bit, please refer to in GR2000 Configuration Commands, (universal CLI) Vol. 1.

-penaltyThis parameterdscp<DSCPenablesValue>the function that specifies a DSCP rewrite value and that determines the output priority and queuing priority using the rewritten DSCP

value. The value and its corresponding output priority and queuing priority are specified using qos-tos-mapcommand. However, the upper six bits of a TOS field are rewritten and the lower two bits are ignored. [Ver. 06-01]

27	26	25	24	23	22	21	20
		DSCP					CU
	High-order 6 bits are designated.
DSCP(Differentiated Services Code Point), CU(Current Unused)
Default:		-upc setting: -penalty_drop
		-max_rate setting: -penalty_drop (All packets that violate the
		-maximum band are discarded.)
		-min_rate setting: -discard 1 (A packet that violates the
		minimum band is made easy to discard.)

Range of value: -penalty_dscp<DSCP_Value>: 0 to 63 (Decimal)

-penalty_discard<No.>: 1 to 4

(The queuing priority value is preferentially discarded as it decreases.)

The range of queuing priority (-penalty_discard) during contract band violation varies depending on the setting conditions.

Table 1-44	Relationship Between Number of Queues and Priority
	Setting Condition		Range
Interface Using		No. of Queue in Output	Queuing Priority
this List		Interface
Input side		--	1-4
Output side		4	1-4
Output side		8	1-4
Output side		16	1-4
Output side		32	1-4
Output side		64	1-4
Output side		250	1-4 (*2)
Output side		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 kbit/s), 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.

1-74	GR2K-GA-0014
	Ver. 07-02