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Cisco Bug: CSCur19416 - QOS drops on Topaz FP-X in various classes with no apparent link issue

Last Modified

Sep 12, 2019

Products (18)

  • Cisco Carrier Routing System
  • Cisco CRS-1 Line Card Chassis (Dual)
  • Cisco CRS-X 8-Slot Single-Shelf System
  • Cisco CRS-3 Multishelf System
  • Cisco CRS-1 16-Slot Line Card Chassis
  • Cisco CRS-X Multishelf System
  • Cisco CRS-1 Line Card Chassis (Multi)
  • Cisco CRS-1 4-Slot Single-Shelf System
  • Cisco IOS XR Software
  • Cisco CRS-3 16-Slot Single-Shelf System
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Known Affected Releases


Description (partial)

Symptom:QOS drops reported by CLI when a qos policy is applied onto an FP-X/40X10 PLIM

Conditions:policy-map 10GE_CORE_LINK
  police rate percent 30 
   conform-action transmit
   exceed-action drop
  priority level 1 
  queue-limit 4000 packets 
  bandwidth percent 5 
  random-detect precedence priority,flash-override 752 packets 2800 packets 
  random-detect precedence immediate 1952 packets 4000 packets 
 class CONTROL
  queue-limit 6000 packets 
  bandwidth percent 10 
 class class-default
  queue-limit 22000 packets 
  bandwidth percent 55 
  random-detect precedence routine 5616 packets 22000 packets 
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