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H Commands
This chapter describes the Cisco NX-OS system management commands that begin with the letter H.
hardware fan-tray maintenance-mode
To put the switch in fan tray maintenance mode to prepare the switch for fan tray migration or removal, use the hardware fan-tray maintenance-mode command. To disable fan tray maintenance mode, use the no form of this command.
hardware fan-tray maintenance-mode [long | medium | short]
no hardware fan-tray maintenance-mode [long | medium | short]
Syntax Description
(Optional) The fans run at 65% speed for approximately 9 minutes. |
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(Optional) The fans run at 75% speed for approximately 6 minutes. |
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(Optional) The fans run at 85% speed for approximately 4 minutes. |
Defaults
The fans run at 100% speed for approximately 4 minutes. Starting from Cisco NX-OS Release 8.1(1), the fans run at 85% speed for approximately 4 minutes.
Command Modes
Global configuration mode (config)
network-admin
vdc-admin
network-operator
vdc-operator
Command History
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This command was modified. By default, the fans will now run at 85% speed for approximately 4 minutes when the hardware fan-tray maintenance-mode command is used. |
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Usage Guidelines
This command does not require a license.
The fan tray maintenance mode will be cancelled in the following cases:
- If a temperature alarm is present.
- Hot-inlet temperature (Sup inlet temperature >= 30 degrees Celsius)
- A fan tray is absent.
- Post-cool period (time elapsed after fan tray removal) has crossed 4 minutes.
Note
The fan tray maintenance mode is cancelled and the fan speed will be set to normal if the fan tray migration or replacement has been completed within 2 minutes after using the hardware fan-tray maintenance-mode command. If the fan tray migration or replacement has not been completed within 2 minutes, the remaining fan trays run at 85% speed for the next 2 minutes and at 100% speed from then on.
Examples
This example shows how to prepare the switch for fan tray removal or migration by putting the switch in fan tray maintenance mode and making the fans run at 85% speed for approximately 4 minutes:
This example shows how to prepare the switch for fan tray removal or migration by putting the switch in fan tray maintenance mode and making the fans run at 65% speed for approximately 9 minutes:
This example shows how to prepare the switch for fan tray removal or migration by putting the switch in fan tray maintenance mode and making the fans run at 75% speed for approximately 6 minutes:
This example shows how to prepare the switch for fan tray removal or migration by putting the switch in fan tray maintenance mode and making the fan run at 85% speed for approximately 4 minutes:
This example shows how to disable fan tray maintenance mode and change the fan speed from 65% to 45%:
hw-module logging onboard
To enable onboard failure logging (OBFL) based on the error type, use the hw-module logging onboard command. To disable OBFL (not recommended), use the no form of this command.
hw-module logging onboard [ counter-stats] [ environmental-history ] [ error-stats ] [ interrupt-stats ] [ module num ] [ obfl-log ]
no hw-module logging onboard [ environmental-history ] [ error-stats ] [ interrupt-stats ] [ module num ] [ obfl-log ]
Syntax Description
(Optional) Specifies OBFL information for a specific module. |
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(Optional) Specifies OBFL (boot-uptime/device-version/obfl-history). |
Defaults
Command Modes
Command History
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Usage Guidelines
The hw-module logging onboard command enables events to be recorded in files stored in nonvolatile memory, so that the data can be used to diagnose problems with hardware modules installed in a Cisco router or switch. When the onboard hardware is started up, a first record is made for each area monitored and becomes a base value for subsequent records. This command provides a circular updating scheme for collecting continuous records and archiving older (historical) records, ensuring accurate data about the hardware. Data is recorded in one of two formats: continuous information that displays a snapshot of data in a continuous file, and summary information that provides details about the data being collected. Use the show logging onboard command to see reports of current and historical data.
Note We recommend that you do not disable OBFL.
This configuration command is applicable to the module inserted in a device. When the module is removed and inserted into a new device, the configuration of this command follows the module to the new device.
Examples
This example shows how to configure OBFL message logging at level 7 (debugging):
Related Commands
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Connects to a specific line card for the purpose of executing commands on that card. |
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header-type
To set the ERSPAN source version, use the header-type command. To disable this feature, use the no form of this command.
Syntax Description
Defaults
Command Modes
Command History
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Usage Guidelines
Examples
This example shows how to change the ERSPAN source session from Type II to Type III:
Related Commands
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