Configuring Pause Buffer Thresholds And Queue Limit Using Ingress Queuing Policy - Cisco Nexus 9000 Series Configuration Manual

Configuring Priority Flow Control
Command or Action
Step 9 (Optional) clear queuing pfc-queue [interface]
[ethernet|ii] [intf-name]
Example:
switch(config)# clear queuing pfc-queue interface
ethernet 1/1
Step 10 (Optional) priority-flow-control recover interface
[ethernet|ii] [intf-name] [qos-group <0-7>]
Example:
switch# priority-flow-control recover interface
ethernet 1/1 qos-group 3
Configuring Pause Buffer Thresholds and Queue Limit Using
Ingress Queuing Policy
The pause buffer thresholds specified in the network-qos policy are shared by all the ports in the system.
However, there are situations where a few ports may need different thresholds (such as long distance
connections). An ingress queuing policy can be used for this purpose.
An ingress queuing policy also allows the configuration of the queue-limit to restrict the amount of shared
buffer that can be used in addition to the reserved pause buffer by the no-drop class.
Each no-drop class is mapped internally to one of the port's priority-group in the ingress direction. The
configured pause buffer thresholds and queue-limit are applied to the priority-group associated with the class.
Note Adding pause buffer size threshold configuration is optional for cable lengths that are less than 100 meters
and it need not be configured.
For cable lengths that are greater than 100m, the pause buffer size threshold configuration is mandatory and
it is required as part of the QoS policy configuration.

Configuring Pause Buffer Thresholds and Queue Limit Using Ingress Queuing Policy

Purpose
|
|
|
|
|
|
| Aggregate Ingress pkts dropped|
+——————————————————————————+
Clears the environment variable PFCWD statistics.
Recovers the interface manually.
Cisco Nexus 9000 Series NX-OS Quality of Service Configuration Guide, Release 7.x
0|
Restored|
0|
Total pkts drained|
0|
Total pkts dropped|
0|
Total pkts drained + dropped|
0|
Aggregate pkts dropped|
0|
Total Ingress pkts dropped|
0| ===>>>>>Ingress
0|===>>>>Ingress
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