Chassis Cooling

The fans on the GigaVUE-TA100 run at 100% of their maximum speed on power up, then drop to approximately 60% 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 10%.

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
70ºC Warning trap sent	85ºC Warning trap sent	90ºC Warning trap sent	105ºC Warning trap sent
80ºC Alert trap sent; Transceiver power disabled	90ºC Alert trap sent	95ºC Alert trap sent	115ºC Alert trap sent; Switch CPU put in reset
95ºC Critical trap sent	95ºC Critical trap sent	100ºC Critical trap sent	140ºC 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 (TA100-C32):

 Intake temperature :           40 C

 Exhaust temperature :          45 C

 CPU temperature :              32 C

 Switch_CPU temperature :       54 C

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

(config) show port params port-list 1/1/c1..c2

              Parameter           1/1/c1           1/1/c2

 ======================  ===============  ===============

...

SFP type:        qsfp28 sr        qsfp28 sr

...

 SFP Power (1-2) (dBm):    -40.00 -40.00    -40.00 -40.00

 SFP Power (3-4) (dBm):    -40.00 -40.00    -40.00 -40.00

 SFP Power (5-6) (dBm):         -      -         -      -

 SFP Power (7-8) (dBm):         -      -         -      -

 SFP Power (9-10)(dBm):         -      -         -      -

 SFP Temperature (C):            20.94            21.12

...

The output of the following CLI command displays the fan speed in RPM (the normal operational speed is approximately 12000 RPM; the maximum speed is approximately 19000 RPM):

(config) show environment

...

 Fan tray 1 (FAN-TAC00):

 1st fan :                      12136 RPM

 2nd fan :                      12288 RPM

 3rd fan :                      12136 RPM

 4th fan :                      11988 RPM

...