Symptom

Nexus 6000 or Nexus 5600 fibre channel interface is up, but not receiving frames.

Conditions

The device attached to the fc interface is continuously performing credit loss recovery. Example from a UCS-FI: show hardware internal fc-mac all-ports * ----------------------------------------------------------------------------- * Port Event * Interface fc1/31 * MMDDYY HHMMSS usecs Event Current State -------------------- ----- ------------- - - IPS_LINK_UP 012617 091713 660742 (0000) E_IPS_LINK_INIT_SUC IPS_LINK_UP 012617 091713 660741 (0001) E_IPS_IDLE IPS_LINK_UP 012617 091713 647293 (0001) E_IPS_LRR IPS_LINK_UP 012617 091713 641516 (2570) E_IPS_CREDIT_LOSS IPS_LINK_UP 012617 091537 800927 (0000) E_IPS_DEBOUNCE_END IPS_LINK_UP 012617 091537 800916 (0000) E_IPS_TMO IPS_LINK_UP 012617 091537 800859 (0000) E_IPS_LINK_INIT_SUC IPS_LINK_UP 012617 091537 800858 (0002) E_IPS_IDLE IPS_LINK_UP 012617 091537 777507 (0001) E_IPS_LRR IPS_LINK_UP 012617 091537 771736 (27C4) E_IPS_CREDIT_LOSS IPS_LINK_UP

Workaround

Further Problem Description

Resolution Summary

To be completed when resolved.