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Why the storm-control counter does not show any storm-control violation even when BUM traffic exceeds the configured threshold?

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TitleWhy the storm-control counter does not show any storm-control violation even when BUM traffic exceeds the configured threshold?
Question
How to check for Storm-control violation? and Why is the default profile counter always show zero?
Environment
SLX platform, all models
SLXOS 18r.1.00c or earlier
 
Answer
Q1: How to check for Storm-control violation?

Answer1: once you configured storm-control on an interface, you will use the cli " show storm-control interface <interface>  to check the output

SLX-Lab1# show storm-control interface e 1/3:1
Interface Type Rate (bps) Conformed Violated Total
Et 1/3:1 broadcast 500000000 0 0 0

Et 1/3:1 multicast 500000000 0 0 0

Et 1/3:1 unknown-unicast 500000000 0 0 0


Q2: Why is the output shows zero under the columns of Confirmed, Violated, and Total?

Answer2:  When using the default profile counter, it does not provide the accurate storm control counter.  One must create a new profile counter in order to be able to see the correct output.

config t
hardware
profile counters counter-profile-2
(* note: once making configuration change in hardware, SLXOS will advise to reload system in order to effect the change)
%Warning: To activate the new profile config, please run 'copy running-config startup-config' followed by 'reload system’.

after the system is reloaded, use the "show storm-control interface <interface> command to check the traffic and violation.

i.e 
SB1# show storm-control interface ethernet 1/3/1
Interface Type Rate (bps) Conformed Violated Total
Et 0/10 broadcast 2000000 338014336 0 338014336
Et 0/10 multicast 2000000 338010112 0 338010112
Et 0/10 unknown-unicast 2000000 338006016 0 338006016


The violation column will count how far over the configured storm-control limit, bps,  we are and show it for the individual settings we have configured (broadcast, multicast, unknown-unicast).
 
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