06-Congestion Avoidance Configuration Commands
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Syntax
display qos wred interface [ interface-type interface-number ]
View
Any view
Default Level
1: Monitor level
Parameters
interface-type interface-number: Specifies an interface by type and number.
Description
Use the display qos wred interface command to display the WRED configuration and statistics of an interface.
If no interface is specified, the WRED configuration and statistics of all interfaces are displayed.
Examples
# Display the WRED configuration and statistics of interface GigabitEthernet 1/0/1.
<Sysname> display qos wred interface gigabitethernet 1/0/1
Interface: GigabitEthernet1/0/1
Current WRED configuration:
Applied WRED table name: test
Table 1-1 display qos wred interface command output description
|
Field |
Description |
|
Interface |
Interface type and interface number |
|
Applied WRED table name |
Name of the WRED table applied |
Syntax
display qos wred table [ table-name ]
View
Any view
Default Level
1: Monitor level
Parameters
table-name: Name of the WRED table to be displayed.
Description
Use the display qos wred table command to display the WRED table configuration information.
If no WRED table name is specified, the configuration of all WRED tables is displayed.
Examples
# Display the configuration of WRED table 1.
<Sysname> display qos wred table 1
Table Name: 1
Table Type: Queue based WRED
QID: gmin gmax gprob ymin ymax yprob rmin rmax rprob
-----------------------------------------------------------------------
0 100 1000 10 100 1000 10 100 1000 10
1 100 1000 10 100 1000 10 100 1000 10
2 100 1000 10 100 1000 10 100 1000 10
3 100 1000 10 100 1000 10 100 1000 10
4 100 1000 10 100 1000 10 100 1000 10
5 100 1000 10 100 1000 10 100 1000 10
6 100 1000 10 100 1000 10 100 1000 10
7 100 1000 10 100 1000 10 100 1000 10
Table 1-2 display qos wred table command output description
|
Field |
Description |
|
Table name |
Name of a WRED table |
|
Table type |
Type of a WRED table |
|
QID |
ID of the queue |
|
gmin |
Lower threshold configured for green packets, with a drop precedence value of 0 |
|
gmax |
Upper threshold configured for green packets, with a drop precedence value of 0 |
|
gprob |
Drop probability configured for green packets, with a drop precedence value of 0 |
|
ymin |
Lower threshold configured for yellow packets, with a drop precedence value of 1 |
|
ymax |
Upper threshold configured for yellow packets, with a drop precedence value of 1 |
|
yprob |
Drop probability configured for yellow packets, with a drop precedence value of 1 |
|
rmin |
Lower threshold configured for red packets, with a drop precedence value of 2 |
|
rmax |
Upper threshold configured for red packets, with a drop precedence value of 2 |
|
rprob |
Drop probability configured for red packets, with a drop precedence value of 2 |
Syntax
qos wred queue table table-name
undo qos wred table table-name
View
System view
Default Level
2: System level
Parameters
queue: Creates a queue-based table. Packets are dropped based on the queue when congestion occurs.
table table-name: Specifies a name for the table.
Description
Use the qos wred table command to create a WRED table and enter WRED table view.
Use the undo qos wred table command to remove a WRED table.
By default, no global WRED table is created.
A WRED table in use cannot be removed.
Related commands: qos wfq, qos wred enable, display qos wred interface.
Examples
# Create a queue-based WRED table named table1.
<Sysname> system-view
[Sysname] qos wred queue table table1
[Sysname-wred-table-table1]
Syntax
queue queue-value [ drop-level drop-level ] low-limit low-limit high-limit high-limit [ discard-probability discard-prob ]
undo queue { queue-value | all }
View
WRED table view
Default Level
2: System level
Parameters
queue-value: Queue number, in the range of 0 to 7.
drop-level drop-level: Drop level, in the range of 0 to 2. If this argument is not specified, the subsequent configuration takes effect on the packets in the queue regardless of the drop level.
low-limit low-limit: Lower limit, which is 100 by default. The range for the low-limit argument is from 0 to 8000.
high-limit high-limit: Upper limit, which is 1000 by default. The range for the high-limit argument is from 0 to 8000.
discard-probability discard-prob: Specifies the drop probability in percentage, in the range of 0 to 100. When the queue length is within the lower limit and upper limit, the switch drops packets based on the drop probability.
Description
Use the queue command to configure the drop-related parameters for a specified queue in the queue-based WRED table.
Use the undo queue command to restore the default.
By default, the global queue-based WRED table uses the following parameters: lower limit 100, upper limit 1000, and drop probability 10.
Related commands: qos wred table.
Examples
# Modify the drop-related parameters for packets with drop level 1 in queue 1 in WRED table queue-table1 as follows: lower limit 120, upper limit 300, and drop probability 20.
<Sysname> system-view
[Sysname] qos wred queue table queue-table1
[Sysname-wred-table-queue-table1]
[Sysname-wred-table-queue-table1] queue 1 drop-level 1 low-limit 120 high-limit 300 discard-probability 20
Syntax
qos wred apply table-name
undo qos wred apply
View
Interface view, port group view
Default Level
2: System level
Parameters
table-name: Name of a global WRED table.
Description
Use the qos wred apply command to apply a global WRED table on a port/port group.
Use the undo qos wred apply command to restore the default.
By default, the tail drop mode is used on a port.
In interface view, the setting is effective on the current port only. In port group view, the setting is effective on all the ports in the port group.
Related commands: display qos wred interface, display qos wred table, qos wred table.
Examples
# Apply the queue-based WRED table queue-table1 to the interface GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface GigabitEthernet1/0/1
[Sysname-GigabitEthernet1/0/1] qos wred apply queue-table1
