Hitachi Gigabit Router GR2000 Series Enhanced Version Configuration Commands, Vol. 2
1-132
GR2K-GA-0014
Ver. 07-02
3. Queue control
When there is a backlog on the output queue, packets remaining on the queue
are transmitted or discarded depending on priority. The QoS discard mode
command (
qos-discard-mode
) sets queue size and enables queuing by priority
class.
1.2.4 qos-discard-mode
Figure 1-6 Range of QoS Discard Mode Control
4. Flow control
The flow-control function identifies incoming IP packets by their flow-control
settings, determines priority, rewrites TOS, and manages reserved bandwidths.
The flow control includes two input form for configuration definition. Features of
each input form are shown in Table 1-65.
For the configuration definition
flow qos
, please refer to Subsection 1.1.7 "flow
qos". The configuration definitions qos-ip-list, qos-list-group, and qos-ip are
described below.
The QoS IP list (
qos-ip-list
) command generates lists defining flow detection
conditions and the various types of flow control active in flow detection. The QoS
IP list group (
qos-ip-list-group
) command assigns a decision order to lists, allowing
Table 1-65 Features of Constituting Definition of Filter Flow Information by Input Form
Item
Constituting Definition Inputting Form
qos-ip-list, qos-ip-list-group,
qos-ip
flow filter
Number of entry(*1)
1024 entry/device
10000 entry/device 2000 entry/RP
Inputting form
Input three commands to define one
list. Effective in defining the same
flow control in multiple number of
input/output interfaces.
Input one command to define one
list. Effective in inputting a number of
entries.
Function use, and unused
unit
Device unit
Device unit, and input/output
interface unit
Operation command
Indication unit for qos ip
flow.
Device unit and list unit
Device unit and input/output
interface unit
Vacant entry indication
Supported.
Unsupported.
*1:
Total value with entries of filters.
Sets from qos-discard-lis
Flow Control (input)
Transmission Control
Fl
ow
D
e
te
c
tio
n
: Control range of this command
Interface
(LINE,DLCI, etc.)
Ro
u
te
S
e
a
rc
h
Priority Determination
TOS Rewrite
Contracted Bandwidth
Monitoring
Queue Control
Flow Control (output)
Fl
ow
D
e
te
c
tio
n
Priority Determination
TOS Rewrite
Contracted Bandwidth
Monitoring
Sets from qos-discard-mode