Chassis Cooling

The fans on the GigaVUE-TA200 run at 100% of their maximum speed on power up, then drop to approximately 40% during normal operations. The temperatures of four components: transceivers, exhaust, CPU, and switch CPU, are monitored. When a component crosses a pre-defined threshold, the fan speed is adjusted dynamically, in increments of approximately 15%.

An SNMP trap is sent when a component reaches the threshold for warning, alert, or critical temperature conditions. Refer to Table 1: Component Temperature Thresholds and Actions for the temperatures at which the warning, alert, and critical traps are sent and any additional action that occurs at a threshold.

 

Table 1: Component Temperature Thresholds and Actions

Transceiver Temperature

Exhaust Temperature

CPU Temperature

Switch CPU Temperature

75ºC

Warning trap sent

70ºC

Warning trap sent

95ºC

Warning trap sent

100ºC

Warning trap sent

80ºC

Alert trap sent; Transceiver power disabled

75ºC

Alert trap sent

100ºC

Alert trap sent

105ºC

Alert trap sent;
Switch CPU put in reset

85ºC

Critical trap sent

80ºC

Critical trap sent

105ºC

Critical trap sent

110ºC

Critical trap sent

The output of the following CLI command displays the current exhaust, CPU, and switch CPU temperatures, as well as the intake temperature:

(config) show environment
...
Card 1 (TA200-C64):
Intake temperature :           29 C
Exhaust temperature :          28 C
CPU temperature :              36 C
Switch CPU temperature :       54 C

The output of the following CLI command displays the transceiver temperature:

(config) show port params port-list 3/1/c1
              Parameter           3/1/c1
 ======================  ===============
...
SFP type:        qsfp28 sr
...
 SFP Power (1-2) (dBm):    -40.00 -40.00
 SFP Power (3-4) (dBm):    -40.00 -40.00
 SFP Power (5-6) (dBm):         -      -
 SFP Power (7-8) (dBm):         -      -
 SFP Power (9-10)(dBm):         -      -
 SFP Temperature (C):            19.75
...

The output of the following CLI command displays the fan speed in RPM (the normal operational speed is approximately 5000 RPM; the maximum speed is approximately 12500 RPM):

(config) show environment
...
-----------------------------------------------------------
Fan tray 1 (FAN-TAC20):
1st fan :                      12136 RPM
2nd fan :                      12522 RPM
-----------------------------------------------------------
Fan tray 2 (FAN-TAC20):
1st fan :                      12173 RPM
2nd fan :                      12443 RPM
-----------------------------------------------------------
Fan tray 3 (FAN-TAC20):
1st fan :                      12249 RPM
2nd fan :                      12404 RPM
-----------------------------------------------------------
Fan tray 4 (FAN-TAC20):
1st fan :                      12288 RPM
2nd fan :                      12326 RPM
-----------------------------------------------------------
...