WRED

Table 1 WRED View

Command	Purpose
**show wred ** [wred_profile_name]	Display WRED profile.

show wred [

[Command] **show wred ** [wred_profile_name]

[Purpose] Display WRED Profile.

[Parameters]

Parameter	Description
wred_profile_name	Profile name.

[View] Privileged User View

[Notes] The default_drop is the system-predefined WRED profile.

[Use Cases]

sonic# show wred
Wred profile default_drop:
    ecn: ecn_none
    green_drop_probability: 100
    green_max_threshold: 1792000
    green_min_threshold: 15360
    red_drop_probability: 100
    red_max_threshold: 8960000
    red_min_threshold: 15360
    wred_green_enable: true
    wred_red_enable: true
    wred_yellow_enable: true
    yellow_drop_probability: 100
    yellow_max_threshold: 7168000
    yellow_min_threshold: 15360
Wred profile default_ecn:
    ecn: ecn_all
    green_drop_probability: 100
    green_max_threshold: 1792000
    green_min_threshold: 15360
    red_drop_probability: 100
    red_max_threshold: 8960000
    red_min_threshold: 15360
    wred_green_enable: true
    wred_red_enable: true
    wred_yellow_enable: true
    yellow_drop_probability: 100
    yellow_max_threshold: 7168000
    yellow_min_threshold: 15360

WRED Config

Table 2 WRED Config

Command	Purpose
wred wred_profile_name	Create a WRED profile and enter WRED Configuration View.
mode drop gmin min_th gmax max_th gprobability probability [ymin min_th ymax max_th yprobability probability|rmin min_th rmax max_th rprobability probability]	Set WRED parameters for green/yellow/red messages.
wred {wred_profile_name|default_drop}	Apply the WRED profile to interfaces.

wred

[Command] wred wred_profile_name

[Purpose] Create a WRED profile and enter WRED Configuration View.

[Parameters]

Parameter	Description
wred_profile_name	Profile name.

[View] Global Configuration View

[Notes] Run command no wred wred_profile_name to delete the WRED profile.

[Use Cases]

sonic(config)# wred test
sonic(config-wred-test)#

mode drop gmin

[Command] mode drop gmin min_th gmax max_th gprobability probability [ymin min_th ymax max_th yprobability probability|rmin min_th rmax max_th rprobability probability]

[Purpose] Set WRED parameters for green/yellow/red messages.

[Parameters]

Parameter	Description
min_th	Set the low limit absolute value of WRED discard in bytes. When the message length in the queue reaches this value, the interface starts to discard. The configurable minimum value is 15 KB.
max_th	Set the high limit absolute value of WRED discard in bytes. When the message length in the queue reaches this value, the interface starts to discard all newly received packets. For CX308P-48Y-N-V2, CX532P-N-V2 and CX732Q-N-V2, the range is min_th ~ 25165824, for CX864E-N, the range is min_th – 16777216, and for other models, the range is min_th ~ 10240000.
probability	Set the maximum discard probability in integer form. The range is [1,100]. It is recommended to set the drop probability to 90 percent for latency-sensitive services and 10 percent for throughput-sensitive services.

[View] WRED Configuration View

[Use Cases]

sonic(config-wred-test)# mode drop gmin 15360 gmax 150000 gprobability 10

wred {

[Command] wred {wred_profile_name|default_drop}

[Purpose] Apply the WRED profile to interfaces.

[Parameters]

Parameter	Description
wred_profile_name	Profile name.

[View] Policy Map-Class Map Configuration View

[Notes] Before running this command, please bind an existing class map to specify the queue to be matched for the policy. The default_drop is the system-predefined WRED profile. Run command no wred wred_profile_name unbind the WRED profile.

[Use Cases]

sonic(config)# class-map classtest
sonic(conifg-cmap-classtest)# exit
sonic(config)# polic-map test1
sonic(config-pmap-test1)# class classtest
sonic(config-pmap-c)# wred wred_profile