Symptom

On cat9300 running 16.6.3 or 16.6.4a counters increase drastically when we have output drops after executing following clear commands: clear controllers ethernet-controller clear counters clear platform hardware fed switch 1 qos statistics interface gig Excess Defer frames counter is set to huge number [around 18446744072089457116] immediately. #show int gigabitEthernet controller | i Excess 18446744072089457116 Excess Defer frames 0 Collision fragments In addition, Total output drops counter also increases dramatically and shows incorrect value. #show interfaces gig | i Total Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 4243238296 While Drop-TH2 shows 11673000 [which is at least 360 times lower than Total Output drops counter] #show platform hardware fed switch 1 qos queue stats interface gig DATA Port:0 Enqueue Counters ------------------------------- Queue Buffers Enqueue-TH0 Enqueue-TH1 Enqueue-TH2 ----- ------- ----------- ----------- ----------- 0 0 0 0 1359 1 1190 0 0 11670000 2 0 0 0 0 3 0 0 0 0 4 0 0 0 0 5 0 0 0 0 6 0 0 0 0 7 0 0 0 0 DATA Port:0 Drop Counters ------------------------------- Queue Drop-TH0 Drop-TH1 Drop-TH2 SBufDrop QebDrop ----- ----------- ----------- ----------- ----------- ----------- 0 0 0 0 0 0 1 0 0 11673000 0 0 2 0 0 0 0 0 3 0 0 0 0 0 4 0 0 0 0 0 5 0 0 0 0 0

Conditions

On cat9300 running 16.6.3 or 16.6.4a apply following clear commands and have output drops on interface: clear controllers ethernet-controller clear counters clear platform hardware fed switch 1 qos statistics interface gig

Workaround

Reload - after reload [before executing above mentioned commands] counters seem to show correct values.

Further Problem Description