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After upgrading JUNOS to version 18.2R1, we can frequently see the below fan speed flap (up and down) chassisd log message on MX2000 series. This article explains the reason for this log message.
*** chassisd ***
Feb 26 01:20:00 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 0: zone 0 fan_speed current 27% target 36% raising ratio 0.12 (linear) SFB 0 Intake-Zone0 temp 73 last 72 WTC 66 WT 72 high limit 80 i2c_ratio 0.12
Feb 26 01:20:00 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 0: set fan_speed to 36% cfg_speed 36% (linear)
Feb 26 01:20:00 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 1: zone 0 fan_speed current 27% target 36% raising ratio 0.12 (linear) SFB 0 Intake-Zone0 temp 73 last 72 WTC 66 WT 72 high limit 80 i2c_ratio 0.12
Feb 26 01:20:00 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 1: set fan_speed to 36% cfg_speed 36% (linear)
Feb 26 01:22:02 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 0: zone 0 fan_speed current 36% target 45% raising ratio 0.25 (linear) SFB 0 Intake-Zone0 temp 74 last 73 WTC 66 WT 72 high limit 80 i2c_ratio 0.25
Feb 26 01:22:02 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 0: set fan_speed to 45% cfg_speed 45% (linear)
Feb 26 01:22:02 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 1: zone 0 fan_speed current 36% target 45% raising ratio 0.25 (linear) SFB 0 Intake-Zone0 temp 74 last 73 WTC 66 WT 72 high limit 80 i2c_ratio 0.25
Feb 26 01:22:02 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 1: set fan_speed to 45% cfg_speed 45% (linear)
Feb 26 01:26:42 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 0: zone 0 fan_speed current 27% target 36% raising ratio 0.12 (linear) SFB 0 Intake-Zone0 temp 73 last 56 WTC 66 WT 72 high limit 80 i2c_ratio 0.12
Feb 26 01:26:42 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 0: set fan_speed to 36% cfg_speed 36% (linear)
Feb 26 01:26:42 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 1: zone 0 fan_speed current 27% target 36% raising ratio 0.12 (linear) SFB 0 Intake-Zone0 temp 73 last 56 WTC 66 WT 72 high limit 80 i2c_ratio 0.12
Feb 26 01:26:42 10.64.2.7 chassisd[5282]: %DAEMON-6: Fan Tray 1: set fan_speed to 36% cfg_speed 36% (linear)
New fan control thermal threshold values for MPC8/9E were implemented in versions 15.1F7, 17.1R3, 17.2R1 and higher. The fan speed algorithm was also modified with the code change.
This behavior change can be confirmed with the lab MX2020 (18 PSMs, 2 RCBs, 8 SFB2, 1 MPC9E in zone#0, 4 Fan Trays) as follows:
User@mx2020> show chassis hardware |find FPC
FPC 1 REV 23 750-063414 xxxxxxxx MPC9E 3D
CPU REV 19 750-057177 xxxxxxxx SMPC PMB
MIC 0 REV 06 750-055992 xxxxxxxx MRATE-12xQSFPP-XGE-XLGE-CGE
PIC 0 BUILTIN BUILTIN MRATE-12xQSFPP-XGE-XLGE-CGE
MIC 1 REV 11 750-055992 xxxxxxxx MRATE-12xQSFPP-XGE-XLGE-CGE
PIC 1 BUILTIN BUILTIN MRATE-12xQSFPP-XGE-XLGE-CGE
Fan Tray 0 REV 03 760-052467 xxxxxxxx 172mm FanTray - 6 Fans
Fan Tray 1 REV 03 760-052467 xxxxxxxx 172mm FanTray - 6 Fans
Fan Tray 2 REV 03 760-052467 xxxxxxxx 172mm FanTray - 6 Fans
Fan Tray 3 REV 03 760-052467 xxxxxxxx 172mm FanTray - 6 Fans
User@mx2020> show chassis fpc
Temp CPU Utilization (%) CPU Utilization (%) Memory Utilization (%)
Slot State (C) Total Interrupt 1min 5min 15min DRAM (MB) Heap Buffer 0 Empty
1 Online 27 13 0 3 0 0 3200 12 19
2 EmptyUser@mx2020> show chassis temperature-thresholds
Fan speed Yellow alarm Red alarm Fire Shutdown
(degrees C) (degrees C) (degrees C) (degrees C)
Item Normal High Normal Bad fan Normal Bad fan Normal
FPC 1 55 60 75 65 90 80 95
User@mx2020> show chassis environment
Class Item Status Measurement
FPC 1 Intake OK 28 degrees C / 82 degrees F
FPC 1 Exhaust A OK 51 degrees C / 123 degrees F
FPC 1 Exhaust B OK 38 degrees C / 100 degrees F
FPC 1 EA0 TSen OK 51 degrees C / 123 degrees F
FPC 1 EA0 Chip OK 45 degrees C / 113 degrees F
FPC 1 EA0_XR0 TSen OK 51 degrees C / 123 degrees F
FPC 1 EA0_XR0 Chip OK 53 degrees C / 127 degrees F
FPC 1 EA0_XR1 TSen OK 51 degrees C / 123 degrees F
FPC 1 EA0_XR1 Chip OK 53 degrees C / 127 degrees F
FPC 1 EA1 TSen OK 51 degrees C / 123 degrees F
FPC 1 EA1 Chip OK 47 degrees C / 116 degrees F
FPC 1 EA1_XR0 TSen OK 51 degrees C / 123 degrees F
FPC 1 EA1_XR0 Chip OK 53 degrees C / 127 degrees F
FPC 1 EA1_XR1 TSen OK 51 degrees C / 123 degrees F
FPC 1 EA1_XR1 Chip OK 55 degrees C / 131 degrees F
FPC 1 PEX TSen OK 51 degrees C / 123 degrees F
FPC 1 PEX Chip OK 39 degrees C / 102 degrees F
FPC 1 EA2 TSen OK 42 degrees C / 107 degrees F
FPC 1 EA2 Chip OK 39 degrees C / 102 degrees F
FPC 1 EA2_XR0 TSen OK 42 degrees C / 107 degrees F
FPC 1 EA2_XR0 Chip OK 45 degrees C / 113 degrees F
FPC 1 EA2_XR1 TSen OK 42 degrees C / 107 degrees F
FPC 1 EA2_XR1 Chip OK 54 degrees C / 129 degrees F
FPC 1 EA3 TSen OK 42 degrees C / 107 degrees F
FPC 1 EA3 Chip OK 39 degrees C / 102 degrees F
FPC 1 EA3_XR0 TSen OK 42 degrees C / 107 degrees F
FPC 1 EA3_XR0 Chip OK 47 degrees C / 116 degrees F
FPC 1 EA3_XR1 TSen OK 42 degrees C / 107 degrees F
FPC 1 EA3_XR1 Chip OK 67 degrees C / 152 degrees F
FPC 1 EA0_HMC0 Logic die OK 59 degrees C / 138 degrees F
FPC 1 EA0_HMC0 DRAM botm OK 56 degrees C / 132 degrees F
FPC 1 EA0_HMC1 Logic die OK 62 degrees C / 143 degrees F
FPC 1 EA0_HMC1 DRAM botm OK 59 degrees C / 138 degrees F
FPC 1 EA0_HMC2 Logic die OK 55 degrees C / 131 degrees F
FPC 1 EA0_HMC2 DRAM botm OK 52 degrees C / 125 degrees F
FPC 1 EA1_HMC0 Logic die OK 63 degrees C / 145 degrees F
FPC 1 EA1_HMC0 DRAM botm OK 60 degrees C / 140 degrees F
FPC 1 EA1_HMC1 Logic die OK 61 degrees C / 141 degrees F
FPC 1 EA1_HMC1 DRAM botm OK 58 degrees C / 136 degrees F
FPC 1 EA1_HMC2 Logic die OK 57 degrees C / 134 degrees F
FPC 1 EA1_HMC2 DRAM botm OK 54 degrees C / 129 degrees F
FPC 1 EA2_HMC0 Logic die OK 52 degrees C / 125 degrees F
FPC 1 EA2_HMC0 DRAM botm OK 49 degrees C / 120 degrees F
FPC 1 EA2_HMC1 Logic die OK 48 degrees C / 118 degrees F
FPC 1 EA2_HMC1 DRAM botm OK 45 degrees C / 113 degrees F
FPC 1 EA2_HMC2 Logic die OK 54 degrees C / 129 degrees F
FPC 1 EA2_HMC2 DRAM botm OK 51 degrees C / 123 degrees F
FPC 1 EA3_HMC0 Logic die OK 52 degrees C / 125 degrees F
FPC 1 EA3_HMC0 DRAM botm OK 49 degrees C / 120 degrees F
FPC 1 EA3_HMC1 Logic die OK 53 degrees C / 127 degrees F
FPC 1 EA3_HMC1 DRAM botm OK 50 degrees C / 122 degrees F
FPC 1 EA3_HMC2 Logic die OK 53 degrees C / 127 degrees F
FPC 1 EA3_HMC2 DRAM botm OK 50 degrees C / 122 degrees F
Fans Fan Tray 0 Fan 1 OK 5640 RPM <--------+
Fan Tray 0 Fan 2 OK 5280 RPM |
Fan Tray 0 Fan 3 OK 5640 RPM |
Fan Tray 0 Fan 4 OK 5280 RPM |
Fan Tray 0 Fan 5 OK 5520 RPM |
Fan Tray 0 Fan 6 OK 5400 RPM |
Fan Tray 1 Fan 1 OK 5400 RPM Zone#0 Fans are spinning at around 5000 rpm. Fan Tray 1 Fan 2 OK 5520 RPM |
Fan Tray 1 Fan 3 OK 5400 RPM |
Fan Tray 1 Fan 4 OK 5520 RPM |
Fan Tray 1 Fan 5 OK 5400 RPM |
Fan Tray 1 Fan 6 OK 5400 RPM <--------+
Fan Tray 2 Fan 1 OK 2400 RPM
Fan Tray 2 Fan 2 OK 2400 RPM
Fan Tray 2 Fan 3 OK 2400 RPM
Fan Tray 2 Fan 4 OK 2520 RPM
Fan Tray 2 Fan 5 OK 2400 RPM
Fan Tray 2 Fan 6 OK 2400 RPM
Fan Tray 3 Fan 1 OK 2400 RPM
Fan Tray 3 Fan 2 OK 2520 RPM
Fan Tray 3 Fan 3 OK 2520 RPM
Fan Tray 3 Fan 4 OK 2400 RPM
Fan Tray 3 Fan 5 OK 2400 RPM
Fan Tray 3 Fan 6 OK 2400 RPMUser@mx2020> show chassis temperature-thresholds
Fan speed Yellow alarm Red alarm Fire Shutdown
(degrees C) (degrees C) (degrees C) (degrees C)
Item Normal High Normal Bad fan Normal Bad fan Normal
FPC 1 Intake 56 61 80 75 90 85 100
FPC 1 Exhaust A 88 93 95 90 105 100 117
FPC 1 Exhaust B 62 67 84 79 94 89 106
FPC 1 EA0 Chip 81 86 87 87 104 104 114
FPC 1 EA0_XR0 Chip 97 102 103 103 105 105 115
FPC 1 EA0_XR1 Chip 97 102 103 103 105 105 115
FPC 1 EA1 Chip 81 86 87 87 104 104 114
FPC 1 EA1_XR0 Chip 97 102 103 103 105 105 115
FPC 1 EA1_XR1 Chip 97 102 103 103 105 105 115
FPC 1 PEX Chip 81 90 105 100 115 110 121
FPC 1 EA2 Chip 81 86 87 87 104 104 114
FPC 1 EA2_XR0 Chip 97 102 103 103 105 105 115
FPC 1 EA2_XR1 Chip 97 102 103 103 105 105 115
FPC 1 EA3 Chip 81 86 87 87 104 104 114
FPC 1 EA3_XR0 Chip 97 102 103 103 105 105 115
FPC 1 EA3_XR1 Chip 97 102 103 103 105 105 115
FPC 1 EA0_HMC0 Logic die 102 107 108 108 110 110 120
FPC 1 EA0_HMC0 DRAM botm 97 102 103 103 105 105 115
FPC 1 EA0_HMC1 Logic die 102 107 108 108 110 110 120
FPC 1 EA0_HMC1 DRAM botm 97 102 103 103 105 105 115
FPC 1 EA0_HMC2 Logic die 102 107 108 108 110 110 120
FPC 1 EA0_HMC2 DRAM botm 97 102 103 103 105 105 115
FPC 1 EA1_HMC0 Logic die 102 107 108 108 110 110 120
FPC 1 EA1_HMC0 DRAM botm 97 102 103 103 105 105 115
FPC 1 EA1_HMC1 Logic die 102 107 108 108 110 110 120
FPC 1 EA1_HMC1 DRAM botm 97 102 103 103 105 105 115
FPC 1 EA1_HMC2 Logic die 102 107 108 108 110 110 120
FPC 1 EA1_HMC2 DRAM botm 97 102 103 103 105 105 115
FPC 1 EA2_HMC0 Logic die 102 107 108 108 110 110 120
FPC 1 EA2_HMC0 DRAM botm 97 102 103 103 105 105 115
FPC 1 EA2_HMC1 Logic die 102 107 108 108 110 110 120
FPC 1 EA2_HMC1 DRAM botm 97 102 103 103 105 105 115
FPC 1 EA2_HMC2 Logic die 102 107 108 108 110 110 120
FPC 1 EA2_HMC2 DRAM botm 97 102 103 103 105 105 115
FPC 1 EA3_HMC0 Logic die 102 107 108 108 110 110 120
FPC 1 EA3_HMC0 DRAM botm 97 102 103 103 105 105 115
FPC 1 EA3_HMC1 Logic die 102 107 108 108 110 110 120
FPC 1 EA3_HMC1 DRAM botm 97 102 103 103 105 105 115
FPC 1 EA3_HMC2 Logic die 102 107 108 108 110 110 120
FPC 1 EA3_HMC2 DRAM botm 97 102 103 103 105 105 115
User@mx2020> show chassis environment
FPC 1 Intake OK 32 degrees C / 89 degrees F
FPC 1 Exhaust A OK 73 degrees C / 163 degrees F
FPC 1 Exhaust B OK 53 degrees C / 127 degrees F
FPC 1 EA0 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA0 Chip OK 67 degrees C / 152 degrees F
FPC 1 EA0_XR0 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA0_XR0 Chip OK 76 degrees C / 168 degrees F
FPC 1 EA0_XR1 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA0_XR1 Chip OK 77 degrees C / 170 degrees F
FPC 1 EA1 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA1 Chip OK 72 degrees C / 161 degrees F
FPC 1 EA1_XR0 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA1_XR0 Chip OK 80 degrees C / 176 degrees F
FPC 1 EA1_XR1 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA1_XR1 Chip OK 81 degrees C / 177 degrees F
FPC 1 PEX TSen OK 74 degrees C / 165 degrees F
FPC 1 PEX Chip OK 45 degrees C / 113 degrees F
FPC 1 EA2 TSen OK 55 degrees C / 131 degrees F
FPC 1 EA2 Chip OK 47 degrees C / 116 degrees F
FPC 1 EA2_XR0 TSen OK 55 degrees C / 131 degrees F
FPC 1 EA2_XR0 Chip OK 55 degrees C / 131 degrees F
FPC 1 EA2_XR1 TSen OK 55 degrees C / 131 degrees F
FPC 1 EA2_XR1 Chip OK 64 degrees C / 147 degrees F
FPC 1 EA3 TSen OK 55 degrees C / 131 degrees F
FPC 1 EA3 Chip OK 49 degrees C / 120 degrees F
FPC 1 EA3_XR0 TSen OK 55 degrees C / 131 degrees F
FPC 1 EA3_XR0 Chip OK 60 degrees C / 140 degrees F
FPC 1 EA3_XR1 TSen OK 55 degrees C / 131 degrees F
FPC 1 EA3_XR1 Chip OK 82 degrees C / 179 degrees F
FPC 1 EA0_HMC0 Logic die OK 82 degrees C / 179 degrees F
FPC 1 EA0_HMC0 DRAM botm OK 79 degrees C / 174 degrees F
FPC 1 EA0_HMC1 Logic die OK 85 degrees C / 185 degrees F
FPC 1 EA0_HMC1 DRAM botm OK 82 degrees C / 179 degrees F
FPC 1 EA0_HMC2 Logic die OK 77 degrees C / 170 degrees F
FPC 1 EA0_HMC2 DRAM botm OK 74 degrees C / 165 degrees F
FPC 1 EA1_HMC0 Logic die OK 88 degrees C / 190 degrees F
FPC 1 EA1_HMC0 DRAM botm OK 85 degrees C / 185 degrees F
FPC 1 EA1_HMC1 Logic die OK 88 degrees C / 190 degrees F
FPC 1 EA1_HMC1 DRAM botm OK 85 degrees C / 185 degrees F
FPC 1 EA1_HMC2 Logic die OK 82 degrees C / 179 degrees F
FPC 1 EA1_HMC2 DRAM botm OK 79 degrees C / 174 degrees F
FPC 1 EA2_HMC0 Logic die OK 61 degrees C / 141 degrees F
FPC 1 EA2_HMC0 DRAM botm OK 58 degrees C / 136 degrees F
FPC 1 EA2_HMC1 Logic die OK 57 degrees C / 134 degrees F
FPC 1 EA2_HMC1 DRAM botm OK 54 degrees C / 129 degrees F
FPC 1 EA2_HMC2 Logic die OK 63 degrees C / 145 degrees F
FPC 1 EA2_HMC2 DRAM botm OK 60 degrees C / 140 degrees F
FPC 1 EA3_HMC0 Logic die OK 63 degrees C / 145 degrees F
FPC 1 EA3_HMC0 DRAM botm OK 60 degrees C / 140 degrees F
FPC 1 EA3_HMC1 Logic die OK 64 degrees C / 147 degrees F
FPC 1 EA3_HMC1 DRAM botm OK 61 degrees C / 141 degrees F
FPC 1 EA3_HMC2 Logic die OK 64 degrees C / 147 degrees F
FPC 1 EA3_HMC2 DRAM botm OK 61 degrees C / 141 degrees F
Fans Fan Tray 0 Fan 1 OK 3120 RPM <--------+
Fan Tray 0 Fan 2 OK 3000 RPM |
Fan Tray 0 Fan 3 OK 3120 RPM |
Fan Tray 0 Fan 4 OK 3120 RPM |
Fan Tray 0 Fan 5 OK 3120 RPM |
Fan Tray 0 Fan 6 OK 3120 RPM |
Fan Tray 1 Fan 1 OK 3120 RPM Zone#0 Fans are spinning at around 3000 rpm. Fan Tray 1 Fan 2 OK 3120 RPM |
Fan Tray 1 Fan 3 OK 3120 RPM |
Fan Tray 1 Fan 4 OK 3120 RPM |
Fan Tray 1 Fan 5 OK 3120 RPM |
Fan Tray 1 Fan 6 OK 3120 RPM <--------+
Fan Tray 2 Fan 1 OK 2400 RPM
Fan Tray 2 Fan 2 OK 2400 RPM
Fan Tray 2 Fan 3 OK 2400 RPM
Fan Tray 2 Fan 4 OK 2520 RPM
Fan Tray 2 Fan 5 OK 2400 RPM
Fan Tray 2 Fan 6 OK 2400 RPM
Fan Tray 3 Fan 1 OK 2400 RPM
Fan Tray 3 Fan 2 OK 2520 RPM
Fan Tray 3 Fan 3 OK 2400 RPM
Fan Tray 3 Fan 4 OK 2400 RPM
Fan Tray 3 Fan 5 OK 2520 RPM
Fan Tray 3 Fan 6 OK 2400 RPMlab@mx2020> show chassis temperature-thresholds |no-more
Fan speed Yellow alarm Red alarm Fire Shutdown
(degrees C) (degrees C) (degrees C) (degrees C)
Item Normal High Normal Bad fan Normal Bad fan Normal
FPC 1 Intake 53 59 72 67 80 75 85
FPC 1 Exhaust A 77 85 98 93 103 98 108
FPC 1 Exhaust B 54 62 80 75 103 98 108
FPC 1 EA0 Chip 64 72 90 90 100 100 105
FPC 1 EA0_XR0 Chip 79 87 102 102 106 106 108
FPC 1 EA0_XR1 Chip 79 87 102 102 106 106 108
FPC 1 EA1 Chip 64 72 90 90 100 100 105
FPC 1 EA1_XR0 Chip 79 87 102 102 106 106 108
FPC 1 EA1_XR1 Chip 79 87 102 102 106 106 108
FPC 1 PEX Chip 74 82 100 100 105 105 110
FPC 1 EA2 Chip 64 72 90 90 100 100 105
FPC 1 EA2_XR0 Chip 79 87 102 102 106 106 108
FPC 1 EA2_XR1 Chip 79 87 102 102 106 106 108
FPC 1 EA3 Chip 64 72 90 90 100 100 105
FPC 1 EA3_XR0 Chip 79 87 102 102 106 106 108
FPC 1 EA3_XR1 Chip 79 87 102 102 106 106 108
FPC 1 EA0_HMC0 Logic die 81 89 103 103 107 107 111
FPC 1 EA0_HMC0 DRAM botm 76 84 98 98 102 102 106
FPC 1 EA0_HMC1 Logic die 81 89 103 103 107 107 111
FPC 1 EA0_HMC1 DRAM botm 76 84 98 98 102 102 106
FPC 1 EA0_HMC2 Logic die 81 89 103 103 107 107 111
FPC 1 EA0_HMC2 DRAM botm 76 84 98 98 102 102 106
FPC 1 EA1_HMC0 Logic die 81 89 103 103 107 107 111
FPC 1 EA1_HMC0 DRAM botm 76 84 98 98 102 102 106
FPC 1 EA1_HMC1 Logic die 81 89 103 103 107 107 111
FPC 1 EA1_HMC1 DRAM botm 76 84 98 98 102 102 106
FPC 1 EA1_HMC2 Logic die 81 89 103 103 107 107 111
FPC 1 EA1_HMC2 DRAM botm 76 84 98 98 102 102 106
FPC 1 EA2_HMC0 Logic die 81 89 103 103 107 107 111
FPC 1 EA2_HMC0 DRAM botm 76 84 98 98 102 102 106
FPC 1 EA2_HMC1 Logic die 81 89 103 103 107 107 111
FPC 1 EA2_HMC1 DRAM botm 76 84 98 98 102 102 106
FPC 1 EA2_HMC2 Logic die 81 89 103 103 107 107 111
FPC 1 EA2_HMC2 DRAM botm 76 84 98 98 102 102 106
FPC 1 EA3_HMC0 Logic die 81 89 103 103 107 107 111
FPC 1 EA3_HMC0 DRAM botm 76 84 98 98 102 102 106
FPC 1 EA3_HMC1 Logic die 81 89 103 103 107 107 111
FPC 1 EA3_HMC1 DRAM botm 76 84 98 98 102 102 106
FPC 1 EA3_HMC2 Logic die 81 89 103 103 107 107 111
FPC 1 EA3_HMC2 DRAM botm 76 84 98 98 102 102 106User@mx2020> show chassis environment
Class Item Status Measurement
FPC 1 Intake OK 33 degrees C / 91 degrees F
FPC 1 Exhaust A OK 69 degrees C / 156 degrees F
FPC 1 Exhaust B OK 52 degrees C / 125 degrees F
FPC 1 EA0 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA0 Chip OK 68 degrees C / 154 degrees F
FPC 1 EA0_XR0 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA0_XR0 Chip OK 77 degrees C / 170 degrees F
FPC 1 EA0_XR1 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA0_XR1 Chip OK 77 degrees C / 170 degrees F
FPC 1 EA1 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA1 Chip OK 72 degrees C / 161 degrees F
FPC 1 EA1_XR0 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA1_XR0 Chip OK 79 degrees C / 174 degrees F
FPC 1 EA1_XR1 TSen OK 74 degrees C / 165 degrees F
FPC 1 EA1_XR1 Chip OK 81 degrees C / 177 degrees F
FPC 1 PEX TSen OK 74 degrees C / 165 degrees F
FPC 1 PEX Chip OK 45 degrees C / 113 degrees F
FPC 1 EA2 TSen OK 56 degrees C / 132 degrees F
FPC 1 EA2 Chip OK 48 degrees C / 118 degrees F
FPC 1 EA2_XR0 TSen OK 56 degrees C / 132 degrees F
FPC 1 EA2_XR0 Chip OK 55 degrees C / 131 degrees F
FPC 1 EA2_XR1 TSen OK 56 degrees C / 132 degrees F
FPC 1 EA2_XR1 Chip OK 65 degrees C / 149 degrees F
FPC 1 EA3 TSen OK 56 degrees C / 132 degrees F
FPC 1 EA3 Chip OK 50 degrees C / 122 degrees F
FPC 1 EA3_XR0 TSen OK 56 degrees C / 132 degrees F
FPC 1 EA3_XR0 Chip OK 61 degrees C / 141 degrees F
FPC 1 EA3_XR1 TSen OK 56 degrees C / 132 degrees F
FPC 1 EA3_XR1 Chip OK 83 degrees C / 181 degrees F
FPC 1 EA0_HMC0 Logic die OK 82 degrees C / 179 degrees F
FPC 1 EA0_HMC0 DRAM botm OK 79 degrees C / 174 degrees F
FPC 1 EA0_HMC1 Logic die OK 85 degrees C / 185 degrees F
FPC 1 EA0_HMC1 DRAM botm OK 82 degrees C / 179 degrees F
FPC 1 EA0_HMC2 Logic die OK 78 degrees C / 172 degrees F
FPC 1 EA0_HMC2 DRAM botm OK 75 degrees C / 167 degrees F
FPC 1 EA1_HMC0 Logic die OK 89 degrees C / 192 degrees F
FPC 1 EA1_HMC0 DRAM botm OK 86 degrees C / 186 degrees F
FPC 1 EA1_HMC1 Logic die OK 88 degrees C / 190 degrees F
FPC 1 EA1_HMC1 DRAM botm OK 85 degrees C / 185 degrees F
FPC 1 EA1_HMC2 Logic die OK 82 degrees C / 179 degrees F
FPC 1 EA1_HMC2 DRAM botm OK 79 degrees C / 174 degrees F
FPC 1 EA2_HMC0 Logic die OK 61 degrees C / 141 degrees F
FPC 1 EA2_HMC0 DRAM botm OK 58 degrees C / 136 degrees F
FPC 1 EA2_HMC1 Logic die OK 57 degrees C / 134 degrees F
FPC 1 EA2_HMC1 DRAM botm OK 54 degrees C / 129 degrees F
FPC 1 EA2_HMC2 Logic die OK 63 degrees C / 145 degrees F
FPC 1 EA2_HMC2 DRAM botm OK 60 degrees C / 140 degrees F
FPC 1 EA3_HMC0 Logic die OK 64 degrees C / 147 degrees F
FPC 1 EA3_HMC0 DRAM botm OK 61 degrees C / 141 degrees F
FPC 1 EA3_HMC1 Logic die OK 65 degrees C / 149 degrees F
FPC 1 EA3_HMC1 DRAM botm OK 62 degrees C / 143 degrees F
FPC 1 EA3_HMC2 Logic die OK 65 degrees C / 149 degrees F
FPC 1 EA3_HMC2 DRAM botm OK 62 degrees C / 143 degrees F
Fans Fan Tray 0 Fan 1 OK 3360 RPM <--------+
Fan Tray 0 Fan 2 OK 3240 RPM |
Fan Tray 0 Fan 3 OK 3240 RPM |
Fan Tray 0 Fan 4 OK 3240 RPM |
Fan Tray 0 Fan 5 OK 3360 RPM |
Fan Tray 0 Fan 6 OK 3240 RPM |
Fan Tray 1 Fan 1 OK 3240 RPM Zone#0 Fans are spinning at around 3000 rpm. Fan Tray 1 Fan 2 OK 3240 RPM |
Fan Tray 1 Fan 3 OK 3360 RPM |
Fan Tray 1 Fan 4 OK 3360 RPM |
Fan Tray 1 Fan 5 OK 3120 RPM |
Fan Tray 1 Fan 6 OK 3360 RPM <--------+
Fan Tray 2 Fan 1 OK 2400 RPM
Fan Tray 2 Fan 2 OK 2400 RPM
Fan Tray 2 Fan 3 OK 2400 RPM
Fan Tray 2 Fan 4 OK 2520 RPM
Fan Tray 2 Fan 5 OK 2400 RPM
Fan Tray 2 Fan 6 OK 2520 RPM
Fan Tray 3 Fan 1 OK 2400 RPM
Fan Tray 3 Fan 2 OK 2400 RPM
Fan Tray 3 Fan 3 OK 2400 RPM
Fan Tray 3 Fan 4 OK 2400 RPM
Fan Tray 3 Fan 5 OK 2520 RPM
Fan Tray 3 Fan 6 OK 2520 RPM
In Junos 17.1R2, thermal threshold values for MPC8/9E are not defined, and the fans spin at higher speeds (around 5000 rpm), so each component temperature is not too high. Therefore, we seldom see the fan speed flap (up and down) chassisd log.
In Junos 17.1R3, new fan control setpoints are added for MPC8E/9E, and the fans spin at lower speeds (around 3000 rpm) with the fan speed algorithm change.
PR1334750 improved the fan's thermal threshold parameters to avoid high temperature alarms. Fans spin at around 3000 rpm as well.
We can frequently see the fan speed flap chassisd log in Junos 17.3R4, 17.4R2, 18.1R1, 18.2R1 and higher because each component's temperature might not be fall with the lower spinning rate. We can safely ignore these frequent chassisd log since it is non-service impacting as long as there are no Major/Minor alarms on the system.
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