Hitachi GR2000 Series Default Range of value, Greater Discard priority, GR2K-GA-0014 179 Ver

Filtering/QoS Information

Default:
range of value:		priorityclass4-discard_class4
		(In terms of priority,<Nohigher.>:1-8the priority value of a packet, the
		greater-	is the outputs		priority.)
		(Indiscardterms_of discard,<No.lower>:1-4the priority value of a packet,
		greater	the discard priority.)
Table 1-88 Range of Priority Class and Discard Class
	Setting Condition						Range
Max. Output	Interface Using			Queue Count of		Output Priority		Queuing Priority
Priority	This List			Output Interface
Omitted	Input side					1-8		1-4
Omitted	Output side			8		1-8		1-4
Omitted	Output side			16		1-16		1-4
Omitted	Output side			32		1-32		1-4
Omitted	Output side			250		1-250		1-4 (*2)
Omitted	Output side			1000		1-1000		1-4 (*2)
8	--			--		1-8		1-4
16	--			--		1-16		1-4
32	--			--		1-32		1-4

*1: When the value other than the range is specified to output priority, the setting becomes invalid.

*2: When QoS queue attribute of output interface is minimum bandwidth guarantee (kbit/s), flow control is processed as follows:

• Queuing priority 1, 2: Flow control is processed by queuing priority 2.

• Queuing priority 3, 4: Flow control is processed by queuing priority 4.

-replaceDescription:tos<New_TosThisValue>parameter makes valid the flow control function replaced by TOS or DS field of Diff-serv. Sets the number of bits replacing TOS or DS field of Diff-serv. The upper 6 bits of the TOS or DS field of Diff-serv field are replaced. The lower 2 bits are ignored even if this parameter is set. When this parameter is set, -priority_class, -discard_class, and -tos_mapcannot be set.

27	26	25	24	23	22	21	20
	Precedence		D	T	R	Unused

High-order 6 bits are designated.

D (Delay), T (Throughput), R (Reliability)

27 26 25 24 23 22 21 20

DSCP

High-Order 6 Bits are Designated.

CU

DSCP (Differentiated Services Code Point), CU (Current Unused)

GR2K-GA-0014	1-179
Ver. 07-02