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Cisco Bug: CSCvs90881 - fec option is not enabling for LR optic

Last Modified

Jun 19, 2020

Products (3)

  • Cisco Network Convergence System 5500 Series
  • Cisco Network Convergence System 5508
  • Cisco IOS XR Software

Known Affected Releases

6.6.3.BASE 7.0.1.BASE

Description (partial)

Symptom:
FEC configuration for interface with LR4 optic has no effect. NCS55 accepting configuration for enabling FEC for LR4 optic, but it is not enabled in hardware, despite show controllers says that FEC is active. If remote device have fec enabled the interface does not come up.

Conditions:
QSFP-100G-LR4 optic is used, and fec configured for interface.
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