Cisco Nexus 9000 Series Configuration Manual page 126

Configuring Tail Drop on Egress Queues
SUMMARY STEPS
1. configure terminal
2. hardware qos q-noise percent value
3. policy-map [type queuing] [match-first] [policy-map-name]
4. class type queuing class-name
5. queue-limit {queue-size [bytes | kbytes | mbytes] | dynamic value}
6. (Optional) Repeat Steps 3 and 4 to assign tail drop thresholds for other queue classes.
7. show policy-map [type queuing [policy-map-name | default-out-policy]]
8. copy running-config startup-config
DETAILED STEPS
Command or Action
Step 1
configure terminal
Example:
switch# configure terminal
switch(config)#
Step 2 hardware qos q-noise percent value
Example:
switch(config)# hardware qos q-noise percent 30
Step 3 policy-map [type queuing] [match-first]
[policy-map-name]
Example:
switch(config)# policy-map type queuing
shape_queues
switch(config-pmap-que)#
Step 4
class type queuing class-name
Example:
switch(config-pmap-que)# class type queuing
c-out-q1
switch(config-pmap-c-que)#
Step 5
queue-limit {queue-size [bytes | kbytes | mbytes] |
dynamic value}
Example:
switch(config-pmap-c-que)# queue-limit 1000 mbytes
Cisco Nexus 9000 Series NX-OS Quality of Service Configuration Guide, Release 7.x
112
Configuring Queuing and Scheduling
Purpose
Enters global configuration mode.
Tunes the random noise parameter. The default value is 20
percent.
This command is supported for Cisco Nexus 9200 and
9300-EX Series switches beginning with Cisco NX-OS
Release 7.0(3)I4(4).
Configures the policy map of type queuing and then enters
policy-map mode for the policy-map name you specify.
Policy-map names can contain alphabetic, hyphen, or
underscore characters, are case sensitive, and can be up to
40 characters.
Configures the class map of type queuing and then enters
policy-map class queuing mode. Class queuing names are
listed in the previous System-Defined Type queuing Class
Maps table.
Assigns a tail drop threshold based on the queue size in
bytes, kilobytes, or megabytes or allows the queue's
threshold size to be determined dynamically depending on
the number of free cells available. The device drops packets
that exceed the specified threshold.
The valid values for byte-based queue size are from 1 to
83886080. The valid values for dynamic queue size are
from 0 to 10 as follows: