Symptom

On IOS-XR These messages appear in the logs: RP/0/RSP0/CPU0:Feb 16 03:47:45.287 : envmon[207]: %PLATFORM-ENVMON-2-FANTRAY_COMM_FAIL : Fan tray communication failure on slot 0/FT0/SP RP/0/RSP0/CPU0:Feb 16 03:47:46.305 : envmon[207]: %PLATFORM-ENVMON-2-ENV_CONDITION : Outstanding environmental condition exists in the chassis RP/0/RSP0/CPU0:Feb 16 03:47:57.287 : envmon[207]: %PLATFORM-ENVMON-2-FANTRAY_COMM_FAIL : Fan tray communication failure on slot 0/FT1/SP RP/0/RSP0/CPU0:asr9k# show environment leds detail Mon Feb 17 17:59:03.475 UTC R/S/I Modules LED Status Alarm Reason 0/RSP0/* host Critical-Alarm On FT comm. failure; < ------- host Major-Alarm Off ---- host Minor-Alarm Off ---- host ACO Off ---- host Fail Off ---- 0/RSP1/* host Critical-Alarm Off ---- host Major-Alarm Off ---- host Minor-Alarm Off ---- host ACO Off ---- host Fail Off ----

Conditions

Running 4.3.x on any ASR9K router Presence of any of these cards in the chassis could trigger this issue. A9K-8T-B A9K-8T-E A9K-8T-L A9K-16T/8-B A9K-16T/8-E A9K-16T/8-L

Workaround

None

Further Problem Description