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Cisco Bug: CSCus24079 - Enabling Speculative Aggregation at S2

Last Modified

Jul 20, 2018

Products (18)

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

5.1.4.BASE 5.3.1.BASE

Description (partial)

Barrier errors get propagated to peer racks causing system wide impact.

When an bad S3(metro) asic injects bad barriers, the MSCs connected to that S3 Wedge and DIFF barrier errors are observed at S2. These errors propagate to peer rack S13s causing plane flaps, asic resets, MSC reloads and sometime can melt down the system.
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