Cisco Nexus 9000 Series Configuration Manual page 117

Configuring Queuing and Scheduling
SUMMARY STEPS
1. configure terminal
2. policy-map [type queuing] [match-first] [policy-map-name]
3. class type queuing class-name
4. queue-limit {queue-size [bytes | kbytes | mbytes] | dynamic value}
5. hardware qos q-noise percent 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 policy-map [type queuing] [match-first]
[policy-map-name]
Example:
switch(config)# policy-map type
queuing shape_queues
switch(config-pmap-que)#
Step 3 class type queuing class-name
Example:
switch(config-pmap-que)# class type
queuing c-out-q1
switch(config-pmap-c-que)#
Step 4 queue-limit {queue-size [bytes | kbytes |
mbytes] | dynamic value}
Example:
switch(config-pmap-c-que)# queue-limit
1000 mbytes
Purpose
Enters global configuration mode.
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:
Value Network Forwarding
of Engine (NFE) enabled
alpha switches
Definition Max % per
queue
0 1/128 ~0.8%
Cisco Nexus 9000 Series NX-OS Quality of Service Configuration Guide, Release 7.x
Configuring Congestion Avoidance
Leaf Spine Engine (LSE) enabled switches
Definition Max % per ASIC value
queue
1/8 ~11% 0
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