Setup Guide

Restore Queue Drop State
You can restore the queue drop triggered due to the storm control PFC detection to the normal state.
Once the storm control PFC is detected on a port or priority, you can activate the queue drop action. You can restore the dropped queue
to normal state on the following conditions.
•
You can restore the queue after a particular period of time. Use the queue-drop backoff-force polling—count command
to remove the queue-drop state after the specified number of polling is done. The queue-drop state, which has been activated due to
the detection of storm control PFC, is forced to get removed. When the
number of polling-interval is set as ‘zero’, the queue-drop
state is not removed until it is explicitly cleared using the storm-control pfc in queue-drop-state clear command.
• You can restore the queue when additional PFC packets for a particular priority are not received for a specified period of time. Use the
queue-drop backoff-on-norxpfc polling-count command to remove the queue-drop state if additional PFCs are not
received after the specified number of polling is done.
For more information about the above commands, see the Dell EMC Networking OS Command Line Reference Guide.
View Details of Storm Control PFC
You can view the status of storm control PFC and the statistical details by using the following Show commands.
Use the show storm-control pfc status stack-unit unit-number port—set portpipe-number command to view
the status of the storm control PFC on a specified stack unit. The following example shows the status on stack unit 0 with port set 0.
DellEMC#show storm-control pfc status stack-unit 1 port-set 0
-------------------------------------------------------------------------------------------------------
Interface Priority State Duration in discard state(in ms) Pkts Dropped(Ingress) Pkts Dropped(Egress) Pkts
Dropped(Ingress,Cumulative) Pkts
Dropped(Egress,Cumulative)-------------------------------------------------------------------------------------------------------
Fo 1/32/1 4 Drop 1194740 2389 135759218588
2389 135759218588
Fo 1/1/1 4 Normal 0 0 0
0 0
Fo 1/17/1 4 Normal 0 0 0
0 0
Use the show storm-control pfc statistics stack-unit unit-number port—set portpipe-number command to
view the statistical data of the storm control PFC on a specified stack unit. The following example shows the statistics on stack unit 0
with port set 0.
DellEMC#show storm-control pfc statistics stack-unit 0 port—set 0
--------------------------------------------------------------------------------
Interface Priority Discard State Count Discard State Clear Count
forced No rxPfc
--------------------------------------------------------------------------------
Te 0/0 3 2 0 0
4 2 0 0
5 2 0 0
6 2 0 0
Te 0/1 3 0 0 0
4 0 0 0
5 0 0 0
6 0 0 0
Te 0/2 3 2 0 0
4 2 0 0
5 2 0 0
6 2 0 0
Te 0/3 3 2 0 0
4 2 0 0
5 2 0 0
6 2 0 0
Te 0/4 3 2 0 0
4 2 0 0
5 2 0 0
6 2 0 0
Te 0/5 3 2 0 0
4 2 0 0
5 2 0 0
6 2 0 0
Te 0/80 3 0 0 0
4 0 0 0
Storm Control
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