Fanless Mode Support
Fanless mode enables the device to
operate with the fans disabled while limiting the PoE budget to 150 Watts. That
is, when
fanless mode is enabled, the fan speed is set to zero RPM, thus allowing the device
to
operate silently.
Fanless mode cannot be enabled when dynamic power management is enabled. If the PoE power allocation is more than 150W, PoE load must be reduced by disabling PoE on interfaces manually or by unplugging PoE devices.
An error message is displayed if you attempt to enable fanless mode in dynamic power mode, as shown in the following example.
ICX8200-48P Router# configure terminal ICX8200-48P Router(config)# chassis fanless all To enable global fanless mode, disable PoE dynamic power management feature. "no inline power allocation dynamic all"
Fanless Mode Considerations
Consider the following points when configuring fanless mode.
- ICX 8100-24P, ICX 8100-48P, ICX 8200-24, ICX 8200-24P, ICX 8200-48, ICX 8200-48P, and ICX 8200-48PF devices support fanless mode.
- Even if fanless mode is configured on a switch, fans will be turned on temporarily during bootup or reboot and will be turned off after the bootup.
- In fanless mode operation, if the temperature of the switch goes beyond a maximum limit, the switch reboots. When fanless mode is enabled on an ICX 8200 device with both 1G and 10G SFPs installed, the maximum temperature for the 10G SFP ports is used.
- When fanless mode is enabled, inserting a 25G SFP will disable the port. If a 25G SFP is already inserted in a port, the optic must be removed before fanless mode can be enabled.
Configuring Fanless Mode and Displaying Status
Fanless mode must be enabled manually. Fanless mode does not depend on the variations in the PoE power allocation and is not triggered based on the thermal policy.
Use the chassis fanless command
to enable fanless mode. Use the no chassis fanless
command to disable fanless mode. When fanless mode is disabled, the fan speed
is
reset to auto, and the PoE budget is reinstated to the default value. A system
log
entry is recorded when fanless mode is enabled or disabled.
Use the show chassis command to
check the status of fans and to determine whether the unit is operating in fanless
mode.
Example: Adjusting Power before Enabling Fanless Mode
The following example checks PoE power
allocation and attempts to configure fanless mode for all fans in an ICX 8200-24P
router. A warning message indicates that the power must be adjusted because the
unit has
more than 150W of PoE power
allocated.
ICX8200-24P Router# show chassis The stack unit 1 chassis info: Power supply 1 (AC - PoE) present, status ok Fan 1 ok, speed (auto): [[1]]<->2 <--- Fanless mode not enabled Fan 2 ok, speed (auto): [[1]]<->2 Fan controlled temperature: 39.1 deg-C Fan speed switching temperature thresholds: Speed 1: NM<----->62 deg-C Speed 2: 54<-----> 69 deg-C (shutdown) Fan 1 Air Flow Direction: Front to Back Fan 2 Air Flow Direction: Front to Back Slot 1 Current Temperature: 29.7 deg-C (Sensor 1), 31.0 deg-C (Sensor 2), 39.1 deg-C (Sensor 3), 37.0 deg-C (Sensor 4), 40.0 deg-C (Sensor 5) Warning level.......: 66.0 deg-C Shutdown level......: 69.0 deg-C Boot Prom MAC : 3845.3b3c.f120 Management MAC: 3845.3b3c.f120 Stack unit-1: The system was last powercycled on Wednesday, 2023-03-15 at 06:08:40+0000 (UTC), powercycle count: 5 ICX8200-24P Router# configure terminal ICX8200-24P Router(config)# chassis fanless all <--- Attempt to set all fans to fanless mode WARNING: Allocated PoE power (360W) is more than 150W on unit 1, fanless mode cannot be enabled.To enable fanless mode in unit 1, kindly turn off PoE on interfaces manually until allocated PoE power is less than or equal to 150W Fanless mode disabled in unit(s): None ICX8200-24P Router(config)#end
The following example turns off inline
power on a range of ports to adjust power consumption to the required level. It
checks
power status, enables fanless mode on all fans in one unit, and checks chassis
status.
ICX8200-24P Router# configure terminal ICX8200-24P Router(config)# no inline power ethernet 1/1/6 to 1/1/24 ICX8200-24P Router(config)# end ICX8200-24P Router# show inline power Power Capacity: Total is 150000 mWatts. Current Free is 150000 mWatts. <-- max allowed Power Allocations: Requests Honored 68 times Port Admin Oper ---Power(mWatts)--- PD Type PD Class Pri Fault/ State State Consumed Allocated Error ----------------------------------------------------------------------------- 1/1/1 On Off 0 0 n/a n/a 3 n/a ! ! 1/1/16 Off Off 0 0 n/a n/a 3 n/a 1/1/17 Off Off 0 0 n/a n/a 3 n/a 1/1/18 Off Off 0 0 n/a n/a 3 n/a 1/1/19 Off Off 0 0 n/a n/a 3 n/a 1/1/20 Off Off 0 0 n/a n/a 3 n/a 1/1/21 Off Off 0 0 n/a n/a 3 n/a 1/1/22 Off Off 0 0 n/a n/a 3 n/a 1/1/23 Off Off 0 0 n/a n/a 3 n/a 1/1/24 Off Off 0 0 n/a n/a 3 n/a ----------------------------------------------------------------------------- Total 0 0 ICX8200-24P Router(config)# chassis fanless all <--- Fanless mode is enabled for all fans Fanless mode enabled in unit(s): 1 ICX8200-24P Router(config)# end ICX8200-24P Router# show chassis The stack unit 1 chassis info: Power supply 1 (AC - PoE) present, status ok Fan 1: Fanless mode enabled <--- Confirms fanless mode is enabled Fan 2: Fanless mode enabled Fan 1 Air Flow Direction: Fanless mode enabled Fan 2 Air Flow Direction: Fanless mode enabled Slot 1 Current Temperature: 30.1 deg-C (Sensor 1), 31.7 deg-C (Sensor 2), 40.1 deg-C (Sensor 3), 38.0 deg-C (Sensor 4), 40.0 deg-C (Sensor 5) Warning level.......: 66.0 deg-C Shutdown level......: 69.0 deg-C Boot Prom MAC : 3845.3b3c.f120 Management MAC: 3845.3b3c.f120 Stack unit-1: The system was last powercycled on Wednesday, 2023-03-15 at 06:08:40+0000 (UTC), powercycle count: 5 ICX8200-24P Router#
Example: Disabling 25G Optics before Enabling Fanless Mode
The following example checks media status
and attempts to enable fanless mode. A system message indicates the presence of
25G
optics, which are incompatible with fanless mode. The user disables the offending
ports
before successfully enabling fanless
mode.
ICX8200-48 Router# show chassis The stack unit 1 chassis info: Power supply 1 (AC - Regular) present, status ok Fan ok, speed (auto): [[1]]<->2 <-- Fanless mode not enabled Fan controlled temperature: 43.8 deg-C Fan speed switching temperature thresholds: Speed 1: NM<----->61 deg-C Speed 2: 53<-----> 70 deg-C (shutdown) Fan 1 Air Flow Direction: Front to Back Slot 1 Current Temperature: 32.6 deg-C (Sensor 1), 41.3 deg-C (Sensor 2), 43.8 deg-C (Sensor 3), 49.0 deg-C (Sensor 4) Warning level.......: 67.0 deg-C Shutdown level......: 70.0 deg-C Boot Prom MAC : 3845.3b3c.ddee Management MAC: 3845.3b3c.ddee Stack unit-1: The system was last powercycled on Monday, 2023-04-17 at 05:53:10+0000 (UTC), powercycle count: 5 ICX8200-48 Router# ICX8200-48 Router# configure terminal ICX8200-48 Router(config)# chassis fanless all To enable fanless mode in unit 1, Please disable 25G ports or remove 25G optics <-- No fanless mode w/ 25G optics ICX8200-48 Router# show media val Port Supported Vendor Type ---------------------------------------------------------------------- 1/2/1 Yes RUCKUS Type : 25GBASE-SR 100m (SFP28) 1/2/3 Yes RUCKUS Type : 25GBASE-SR 100m (SFP28) ICX8200-48 Router# configure terminal ICX8200-48 Router(config)# internet ethernet 1/2/1 ethernet 1/2/3 <-- Disabling offending ports ICX8200-48 Router(config-mif-1/2/1,1/2/3)# disable ICX8200-48 Router(config-mif-1/2/1,1/2/3)# exit ICX8200-48 Router(config)# chassis fanless all <-- Fanless mode can be enabled now. Fanless mode enabled in unit(s): 1 ICX8200-48 Router(config)# end ICX8200-48 Router# ICX8200-48 Router# show chassis The stack unit 1 chassis info: Power supply 1 (AC - Regular) present, status ok Fanless mode enabled Fan 1 Air Flow Direction: Fanless mode enabled <-- Fanless mode confirmed. Slot 1 Current Temperature: 32.7 deg-C (Sensor 1), 41.5 deg-C (Sensor 2), 44.0 deg-C (Sensor 3), 49.0 deg-C (Sensor 4) Warning level.......: 67.0 deg-C Shutdown level......: 70.0 deg-C Boot Prom MAC : 3845.3b3c.ddee Management MAC: 3845.3b3c.ddee Stack unit-1: The system was last powercycled on Monday, 2023-04-17 at 05:53:10+0000 (UTC), powercycle count: 5