PTX10016 Cooling System
The PTX10016 cooling system components work together to keep all components within the acceptable temperature range. If the maximum temperature specification is exceeded and the system cannot be adequately cooled, the Routing and Control Board (RCB) shuts down some or all of the hardware components.
PTX10016 Cooling System and Airflow
The cooling system in a PTX10016 chassis consists of dual fan trays and dual fan tray controllers.
Two fan tray models and their associated fan tray controllers are available. See Table 1.
All power supplies installed in the routers have internal fans that contribute to chassis cooling. The JNP10K-PWR-AC2 and JNP10K-PWR-DC2 power supplies play a more substantial role in cooling the chassis than the JNP10K-PWR-AC and JNP10K-PWR-DC models. Therefore, all the JNP10K-PWR-AC2 or JNP10K-PWR-DC2 power supplies must be present in a running chassis to have the adequate airflow. While all power supplies are required to be present in the chassis, they do not necessarily be connected to power. If a power supply is installed in a slot but not connected to a power source, it draws power from the chassis to power the internal fans in the power supplies.
Fan Tray
All fan trays are hot-insertable and hot-removable field replaceable units (FRUs).
The two fan trays install vertically, side by side, next to the power supplies on the FRU side of the chassis. Two handles on each front faceplate facilitate handling of the fan tray. See Figure 1 and Figure 2.
Each JNP10016-FAN fan tray contains 21 fans, a nonremovable control board, and LEDs.
Each JNP10016-FAN2 fan tray contains 42 fans, a nonremovable control board, and LEDs.
See Table 1 for the physical specifications for the fan trays.
|
Specification |
JNP10016-FAN |
JNP10016-FAN2 |
|---|---|---|
|
Corresponding fan tray controller model |
JNP10016-FAN-CTRL |
JNP10016-FTC2 |
|
Number of fans per fan tray |
21 |
42 |
|
Number of fans per chassis |
42 |
84 |
|
Volume flow per fan tray at 100% at 72° F |
1070 cubic feet per minute (CFM) |
1610 CFM |
|
Volume flow per chassis at 100% at 72° F |
2420 CFM |
3660 CFM |
|
Height |
36.6 in. (92.97 cm) |
36.5 in. (92.97 cm) |
|
Width |
6.6 in. (16.8 cm) |
6.6 in. (16.8 cm) |
|
Depth |
4.0 in. (10.2 cm) without handles, 5.2 in. (13.2 cm) with handles |
5.5 in. (13.97 cm) without handles, 6.7 in. (17.01 cm) |
|
Weight |
19.8 lb (8.98 kg) |
33.8 lb (15.33 kg) |
Remove only one fan tray when replacing an existing fan tray while the router is running. The router continues to operate for a limited time with a single operating fan tray without triggering a thermal alarm.
To avoid a thermal alarm, do not remove both fan trays while the router is operating.
The chassis will shut down if a thermal alarm is raised for more than three minutes.
The internal fan Control Board in each fan tray contains the LEDs for the associated fan tray controllers and the LEDs for the three SIBs directly behind the fan tray.
Fan Tray Controllers
The two fan tray controllers provide the control logic and power to hot-insert and hot-remove a fan tray.
The system continually monitors the temperature of critical parts across the chassis and adjusts the chassis fan speed according to the temperature.
The PTX10016 supports two fan tray controller models:
-
JNP10016-FAN-CTRL—Supports the JNP10016-FAN fan tray model; see Figure 3.
Figure 3: JNP10016-FAN-CTRL Fan Tray Controller
-
JNP10016-FTC2—Supports the JNP10016-FAN2 fan tray model; see Figure 4.
Figure 4: JNP10016-FTC2 Fan Tray Controller
Software controls the fan speed.
Under
normal operating conditions, the fans in the fan tray run at less than full
speed. If one fan tray controller fails or appears
missing (such as when a SIB is being replaced), the other fan tray
controller sets the fans to full speed. This allows the router to continue
to operate normally as long as the remaining fans cool the chassis
sufficiently. Use the show chassis fan command to see the
status of individual fans and fan speed. For example:
user@device> show chassis fan
Item Status RPM Measurement
Fan Tray 0 Fan 0 OK 4500 Spinning at normal speed
Fan Tray 0 Fan 1 OK 4650 Spinning at normal speed
Fan Tray 0 Fan 2 OK 4650 Spinning at normal speed
Fan Tray 0 Fan 3 OK 4800 Spinning at normal speed
Fan Tray 0 Fan 4 OK 4650 Spinning at normal speed
Fan Tray 0 Fan 5 OK 4650 Spinning at normal speed
Fan Tray 0 Fan 6 OK 4650 Spinning at normal speed
Fan Tray 0 Fan 7 OK 4500 Spinning at normal speed
Fan Tray 0 Fan 8 OK 4500 Spinning at normal speed
Fan Tray 0 Fan 9 OK 4650 Spinning at normal speed
Fan Tray 0 Fan 10 OK 4650 Spinning at normal speed
Fan Tray 0 Fan 11 OK 4500 Spinning at normal speed
Fan Tray 0 Fan 12 OK 4500 Spinning at normal speed
Fan Tray 0 Fan 13 OK 4500 Spinning at normal speed
Fan Tray 0 Fan 14 OK 4650 Spinning at normal speed
Fan Tray 0 Fan 15 OK 4350 Spinning at normal speed
Fan Tray 0 Fan 16 OK 4500 Spinning at normal speed
Fan Tray 0 Fan 17 OK 4500 Spinning at normal speed
Fan Tray 0 Fan 18 OK 4350 Spinning at normal speed
Fan Tray 0 Fan 19 OK 4500 Spinning at normal speed
Fan Tray 0 Fan 20 OK 4500 Spinning at normal speed
Fan Tray 1 Fan 0 OK 4500 Spinning at normal speed
Fan Tray 1 Fan 1 OK 4650 Spinning at normal speed
Fan Tray 1 Fan 2 OK 4500 Spinning at normal speed
Fan Tray 1 Fan 3 OK 4500 Spinning at normal speed
Fan Tray 1 Fan 4 OK 4650 Spinning at normal speed
Fan Tray 1 Fan 5 OK 4650 Spinning at normal speed
Fan Tray 1 Fan 6 OK 4650 Spinning at normal speed
Fan Tray 1 Fan 7 OK 4500 Spinning at normal speed
Fan Tray 1 Fan 8 OK 4500 Spinning at normal speed
Fan Tray 1 Fan 9 OK 4650 Spinning at normal speed
Fan Tray 1 Fan 10 OK 4500 Spinning at normal speed
Fan Tray 1 Fan 11 OK 4500 Spinning at normal speed
Fan Tray 1 Fan 12 OK 4500 Spinning at normal speed
Fan Tray 1 Fan 13 OK 4650 Spinning at normal speed
Fan Tray 1 Fan 14 OK 4500 Spinning at normal speed
Fan Tray 1 Fan 15 OK 4650 Spinning at normal speed
Fan Tray 1 Fan 16 OK 4650 Spinning at normal speed
Fan Tray 1 Fan 17 OK 4650 Spinning at normal speed
Fan Tray 1 Fan 18 OK 4650 Spinning at normal speed
Fan Tray 1 Fan 19 OK 4500 Spinning at normal speed
Fan Tray 1 Fan 20 OK 4500 Spinning at normal speed
user@device>
There are two fan tray controller models and supported fan trays available. All models are hot-insertable and hot-removable. See Table 2.
|
Specification |
JNP10016-FAN-CTRL |
JNP10016-FTC2 |
|---|---|---|
|
Corresponding fan tray model |
JNP10016-FAN |
JNP10016-FAN2 |
|
Height |
1.5 in. (3.81 cm) |
1.5 in. (3.81 cm) |
|
Width |
6.5 in. (15.24 cm) |
6.5 in. (15.24 cm) |
|
Depth |
12.4 in. (31.5 cm) |
12.4 in. (31.5 cm) |
|
Weight |
1.5 lb (0.68 kg) |
2.3 lb (1.04 cm) |
Airflow Direction in the PTX10016 Router
The air intake vent to cool the chassis is located on the port (line card) side of the chassis. Air flows into the chassis from the ports in the RCBs and line cards, through the SIBs, and exits from the fan trays and the power supplies. This airflow is called port-to-FRU cooling or airflow out (AFO). See Figure 5.
The fan tray continues to operate indefinitely and provides sufficient cooling even when a single fan fails, provided the room temperature is within the operating range. You can check the status of fans by viewing the LEDs on each fan tray. See PTX10016 Fan Tray LEDs and Fan Tray Controller LEDs.
You cannot replace a single fan. If one or more fans fail, you must replace the entire fan tray.
In addition to the fan trays, there is an internal fan in each power supply.
PTX10016 Fan Tray LEDs and Fan Tray Controller LEDs
Each fan tray in the PTX10016 has a set of LEDs. Each corresponding fan tray controller also has a set of LEDs.
Fan Tray LEDs
Each fan tray has a set of LEDs that represent the status of the fans in the fan tray, the fan tray controller, and the three Switch Interface Boards (SIBs). The fan tray LEDs are located in the top left corner of each fan tray. Figure 6 shows the location of the LEDs on JNP10016-FAN fan trays. See Figure 7 for the location of LEDs on the JNP10016-FAN2 fan trays.
1 — Fan status LED | 3 — SIB status LEDs (SIB 0 through SIB 2 for the left fan tray and SIB 3 through SIB 5 for the right fan tray) |
2 — Fan tray controller status LED |
1 — Fan status LED | 3 — SIB status LEDs (SIB 0 through SIB 2 for the left fan tray and SIB 3 through SIB 5 for the right fan tray). |
2 — Fan tray controller status LED |
Table 3 describes the functions of the fan tray LEDs.
Name |
Color |
State |
Description |
|---|---|---|---|
|
FAN (fan status) |
Green |
On steadily |
All fans are operating normally. The system has verified that the fan tray is engaged, that the airflow is in the correct direction, and that all fans are operating correctly. |
Yellow |
Blinking |
An error has been detected in one or more fans in the fan tray. Replace the fan tray as soon as possible. Either the fan has failed or it has become disconnected. To maintain proper airflow through the chassis, leave the fan tray installed in the chassis until you are ready to replace it. |
|
None |
Off |
The fan is not receiving power from the fan tray controller. |
|
FTC (fan tray controller status) |
Green |
On steadily |
The fan tray controller is online and is operating normally. |
Yellow |
Blinking |
An error has been detected in the fan tray controller. Replace the fan tray controller as soon as possible. The fan tray controller is located behind the fan tray above the SIBs. To maintain proper airflow through the chassis, leave the fan tray installed in the chassis until you are ready to replace the fan tray controller. |
|
None |
Off |
The fan tray controller is not receiving power. |
|
SIB Status (SIB 0 status) |
Green |
On steadily |
The left-most SIB in the chassis is online. |
Yellow |
Blinking |
An error has been detected in SIB 0. Replace the SIB as soon as possible. The SIB is located behind the left fan tray and is the left-most SIB in the chassis. To maintain proper airflow through the chassis, leave the fan tray installed in the chassis until you are ready to replace the SIB. |
|
None |
Off |
The SIB is offline. |
|
SIB Status (SIB 1 status) |
Green |
On steadily |
The center SIB behind the left fan tray is online. |
Yellow |
Blinking |
An error has been detected in SIB 1. Replace the SIB as soon as possible. The SIB is located behind the left fan tray and is the middle SIB in the group of 3. To maintain proper airflow through the chassis, leave the fan tray installed in the chassis until you are ready to replace the SIB. |
|
None |
Off |
The SIB is offline. |
|
SIB Status (SIB 2 status) |
Green |
On steadily |
The right-most SIB behind the left fan tray is online. |
Yellow |
Blinking |
An error has been detected in SIB 2. Replace the SIB as soon as possible. The SIB is located behind the left fan tray and is the right-most SIB in the group of 3. To maintain proper airflow through the chassis, leave the fan tray installed in the chassis until you are ready to replace the SIB. |
|
None |
Off |
The SIB is offline. |
|
SIB Status (SIB 3 status) |
Green |
On steadily |
The left-most SIB behind the right fan tray is online. |
Yellow |
Blinking |
An error has been detected in SIB 3. Replace the SIB as soon as possible. The SIB is located behind the right fan tray and is the left-most SIB in the group of 3. To maintain proper airflow through the chassis, leave the fan tray installed in the chassis until you are ready to replace the SIB. |
|
None |
Off |
The SIB is offline. |
|
SIB Status (SIB 4 status) |
Green |
On steadily |
The center SIB behind the right fan tray is online. |
Yellow |
Blinking |
An error has been detected in SIB 4. Replace the SIB as soon as possible. The SIB is located behind the right fan tray and is the middle SIB in the group of 3. To maintain proper airflow through the chassis, leave the fan tray installed in the chassis until you are ready to replace the SIB. |
|
None |
Off |
The SIB is offline. |
|
SIB Status (SIB 5 status) |
Green |
On steadily |
The right-most SIB behind the right fan tray is online. |
Yellow |
Blinking |
An error has been detected in SIB 5. Replace the SIB as soon as possible. The SIB is located behind the right fan tray and is the right-most SIB in the group of 3. To maintain proper airflow through the chassis, leave the fan tray installed in the chassis until you are ready to replace the SIB. |
|
None |
Off |
The SIB is offline. |
Fan Tray Controller LEDs
All models of fan tray controller have the same LEDs. The fan tray controller LEDs are visible only when the associated fan tray is removed. The fan tray controller LEDs are located on the right of the controller panel. Figure 8 shows the location of the LEDs on the JNP10016-FAN-CTRL or the JNP10016-FTC2 fan tray controller faceplate.
1 — Fan tray controller power | 2 — Fan tray controller status |
Table 4 describes the functions of the fan tray controller LEDs.
Name |
Color |
State |
Description |
|---|---|---|---|
PWR (fan tray controller power) |
Green |
On steadily |
The fan tray controller has power and is operating normally. |
Yellow |
Blinking |
A power error has been detected in the fan tray controller. Replace the fan tray controller as soon as possible. To maintain proper airflow through the chassis, leave the fan tray installed in the chassis until you are ready to replace the fan tray controller. |
|
None |
Off |
The fan tray controller is not powered on or is not receiving power. |
|
STATUS (fan tray controller status) |
Green |
On steadily |
The fan tray controller is online and is operating normally. |
Yellow |
Blinking |
An error has been detected in the fan tray controller. Replace the fan tray controller as soon as possible. To maintain proper airflow through the chassis, leave the fan tray installed in the chassis until you are ready to replace the fan tray controller. |
|
None |
Off |
The fan tray controller is not receiving power. |