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Catalyst 4000 Family Switch, Cisco IOS Software Configuration Guide, 12.1(11b)EW
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Preface
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Product Overview
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Command-Line Interfaces
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Configuring the Catalyst 4000 Family Switch for the First Time
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Configuring Interfaces
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Checking Port Connectivity and Status
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Configuring Layer 2 Ethernet Interfaces
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Configuring VLANs
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Configuring Private VLANs
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Configuring VTP
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Configuring Layer 3 Interfaces
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Configuring EtherChannel
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Configuring STP
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Configuring STP Features
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Configuring IP Multicast Layer 3 Switching
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Configuring Network Security
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Configuring IGMP Snooping
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Configuring CDP
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Configuring UDLD
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Configuring QoS
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Configuring SPAN
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Power Management and Environmental Monitoring
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Configuring Voice Interfaces
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Acronyms
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Table Of Contents
Power Management and Environmental Monitoring
Understanding How Environmental Monitoring Works
Environmental Monitoring Using CLI Commands
Limitations of the 1+1 Redundancy Mode
Setting the Power Redundancy Mode
Power Management and Environmental Monitoring
This chapter describes power management and environmental monitoring features in the Catalyst 4006 switch with Supervisor Engine III. It provides guidelines, procedures, and configuration examples.
This chapter consists of the following major sections:
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Understanding How Environmental Monitoring Works
Note
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/index.htm
Understanding How Environmental Monitoring Works
Environmental monitoring of chassis components provides early warning indications of possible component failure. This warning helps to ensure safe and reliable system operation and avoid network interruptions. This section describes the monitoring of these critical system components, which will help you to identify and rapidly correct hardware-related problems in your system.
Environmental Monitoring Using CLI Commands
This section describes the show environment CLI command.
Enter the show environment [alarm | status | temperature] command to display system status information. Keyword descriptions are listed in Table 22-1. For more information on these commands, refer to the Command Reference for the Catalyst 4006 Switch with Supervisor Engine III.
The following example shows how to display the environment conditions:
Switch#show envno alarmChassis Temperature = 32 degrees CelsiusChassis Over Temperature Threshold = 75 degrees CelsiusChassis Critical Temperature Threshold = 95 degrees CelsiusPower FanSupply Model No Type Status Sensor------ -------------- --------- ------- ------PS1 PWR-C4K-400AC AC 400W good goodPS2 none -- -- --Chassis Type :WS-C4006Supervisor Led Color :GreenFantray :goodSwitch#LED Indications
There are two alarm types, major and minor. Major alarms indicate a critical problem that could lead to system shutdown. Minor alarms are just informational, alerting you to a problem that could turn critical if corrective action is not taken.
When the system has an alarm (major or minor) indicating an over-temperature condition, the alarm is not canceled or any action taken (such as module reset or shutdown) for 5 minutes. If the temperature falls 5°C below the alarm threshold during this period, the alarm is canceled.
Table 22-2 lists the LEDs that are used as environmental indicators for the supervisor engine and switching modules.
Note
Table 22-2 Alarms for Supervisor Engine and Switching Modules
Supervisor engine temperature sensor exceeds major threshold1
Major
Status2 LED red
Syslog message.
If the overtemperature condition is not corrected, the system shuts down after 5 minutes.
Alarm thresholds:
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Supervisor engine temperature sensor exceeds minor threshold
Minor
Status LED orange
Syslog message.
Monitor the condition.
1 Temperature sensors monitor key supervisor engine components including daughter cards.
2 A Status LED is located on the supervisor engine front panel and all module front panels.
Power Management
This section describes power management in the Catalyst 4006 switch and includes the following major sections:
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Power Redundancy
The power redundancy feature is designed to support an optimized Catalyst 4006 chassis consisting of a Supervisor Engine III and four WS-X4148-RJ or WS-X4148-RJ21 modules operating in 1+1 redundancy mode (one primary power supply plus one redundant power supply). Additional configurations are possible.
In systems with redundant power supplies, it is recommended that both power supplies be of the same wattage. The Catalyst 4000 family switches allow you to mix AC-input and DC-input power supplies in the same chassis. For detailed information on supported power supply configurations for each chassis, refer to the Catalyst 4000 Family Installation Guide.
Catalyst 4000 family modules have different power requirements; thus, some switch configurations require more power than 1+1 redundancy mode (a single power supply) can provide. The 2+1 redundancy mode requires three power supplies (2 primary power supplies plus one redundant power supply). The default is 2+1 redundancy mode.
The Catalyst 4006 switch contains holding bays for up to three power supplies. You need two primary power supplies to operate a fully loaded Catalyst 4006 chassis. You can set the power redundancy to 2+1 redundancy mode or 1+1 redundancy mode. The 1+1 redundancy mode may not support a fully loaded chassis.
If your switch has only two power supplies and is in 2+1 redundancy mode, there is no redundancy. You can create redundancy with only two power supplies by setting the power redundancy to operate in 1+1 redundancy mode (one primary plus one redundant power supply). However, 1+1 redundancy will not support all configurations.
The 1+1 redundancy mode is designed and optimized for a specific hardware configuration: a Catalyst 4006 chassis with a Supervisor Engine III and four WS-X4148-RJ or WS-X4148-RJ21 modules. Although other configurations are possible, we do not recommend that you use them without careful consideration of the power usage in the system. For example, other similar and possible configurations can consist of four modules, where each module consumes 65W or less (for a total of 265W) or, more generally, where the total module power usage does not exceed the absolute maximum module usage of 265W.
The Supervisor Engine III uses 110W, and the fan box uses 25W, for a system total of 400W (modules + supervisor + fan). If you opt to use the 1+1 redundancy mode, the type and number of modules supported are limited by the power available from a single power supply. To determine the power consumption for each module in your chassis, see the "Power Consumption of Modules" section.
To choose a 1+1 redundancy configuration, you must change the system configuration from the default 2+1 redundancy mode to 1+1 redundancy mode by using the power supplies required 1 command. The power supplies required 1 command sets the power redundancy to 1+1 redundancy mode. In the 1+1 redundancy mode, the nonredundant power available to the system is the power of the single weakest power supply. The second power supply installed in your switch provides full redundancy.
Limitations of the 1+1 Redundancy Mode
If you attempt to configure the system to operate in 1+1 redundancy mode, and you have more modules installed in the chassis than a single power supply can handle, the system displays the following error message: Insufficient power supplies for the current chassis configuration. This message will also appear in the show power command output.
If you are already operating in 1+1 redundancy mode with a valid module configuration and you attempt to insert additional modules that require more power than the single power supply provides, the system immediately places the newly inserted module into reset mode and issues these error messages: Module has been inserted and Insufficient power supplies operating. Additionally, if a chassis that has been operating in 1+1 redundancy mode with a valid module configuration is powered down, and you insert a module or change the module configuration inappropriately and power on the switch again, the module(s) in the chassis (at boot up) that require more power than is available, are placed into reset mode.
Both of these scenarios initiate the five-minute evaluation countdown timer. When this timer runs out, the system attempts to resolve this power usage limitation by evaluating the type and number of modules installed. The evaluation process may require several cycles to stabilize the chassis' power usage.
During the evaluation cycle, the modules are in effect removed and re-inserted, thus causing disruption of network connectivity; the switch reactivates only the modules it is able to support with the limited power available and leaves the remaining modules in reset mode. The supervisor engine always remains enabled. Modules placed in reset mode still consume some power. If the chassis module combination, including the modules in reset, still require more power than is available, the five-minute evaluation countdown timer starts for another evaluation cycle, and additional modules are placed in reset mode until the power usage is stable.
If the power requirement of the active modules and with the modules in reset does not exceed the available power, the system is stable and no more evaluation cycles are run, until something again causes insufficient power usage. One or possibly two cycles are required to stabilize the system. If you configure the chassis correctly, the system will not enter the evaluation cycle.
Note
A module in reset continues to draw power as long as it is installed in the chassis; however, the show module command output indicates that there is not enough power for the module.
To compute the power requirements for your system and verify that your system has enough power, add up the power consumed by the supervisor engine module, the fan box, and the modules you wish to use. A single power supply provides 400W, and two power supplies provide 750W. For 1+1 redundancy mode, verify that the total is less than 400W.
For example, the following configuration requires a minimum of 395W:
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This is 5W less than the maximum that a single power supply can provide in 1+1 redundancy mode.
The following configuration, however, requires more power than a single power supply can supply:
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This configuration requires 445W and cannot be used in 1+1 redundancy mode.
Remember, when considering the 1+1 redundancy mode, you must carefully plan the configuration of the module power usage of your chassis. An incorrect configuration will momentary disrupt your system during the evaluation cycle. To avoid this disruption, carefully plan your configuration to ensure it is within the power limits, or return to the default 2+1 redundancy configuration by installing a third power supply in your switch and set the power redundancy to 2+1 redundancy mode.
Use the power supplies required 2 command to set the power redundancy to the 2+1 redundancy mode.
Power Consumption of Modules
A single power supply provides 400W; two power supplies provide 750W. When operational, the supervisor engines consume no more than 110W and the fan box consumes 25W. For power consumption of common Catalyst 4006 modules, see Table 22-3.
Enter the show power command to display the current power redundancy and the current system power usage.
Setting the Power Redundancy Mode
To configure the power redundancy mode, perform the following procedure:
The default power redundancy mode is 2 (2+1) redundancy mode.
The following example shows how to set the power redundancy mode to 1 (1+1 redundancy mode).
Switch (config)# power supplies required 1Switch (config)#The following example shows how to display the current power status of system components and the power redundancy mode:
Switch# show powerPower FanSupply Model No Type Status Sensor------ -------------- --------- ------- ------PS1 WS-X4008 AC 400W good goodPS2 WS-X4008 AC 400W good goodPS3 none -- -- --PEM none -- -- --Power Summary(in Watts) Available Used Remaining------------- --------- ------ ---------System Power 750 255 495Inline Power 0 0 0Power supplies needed by system = 2Switch#The following example shows the show module command output for a system with inadequate power for all installed modules.
Switch# show moduleMod Ports Card Type Model Serial No.----+-----+--------------------------------------+-----------------+-----------1 2 1000BaseX (GBIC) Supervisor Module WS-X4014JAB060706002 48 10/100BaseTX (RJ45) WS-X4148JAB040409GK3 48 10/100BaseTX (RJ45) WS-X4148JAB023402RMM MAC addresses Hw Fw Sw Stat--+--------------------------------+---+-----------------+---------------+-----1 0004.27b6.5a00 to 0004.27b6.5dff 1.2 12.1(11r)EW 12.1(11)EK2(0.2 Ok2 00b0.6465.2cf0 to 00b0.6465.2d1f 2.3 Ok3 0050.0f10.2850 to 0050.0f10.287f 1.0 Ok4 0001.6445.c3e0 to 0001.6445.c40f 0.0 Other5 0030.850e.2dc8 to 0030.850e.2ddf 0.7 Other6 0002.b9f1.e340 to 0002.b9f1.e36f 1.0 OtherSwitch#Configuring Inline Power
If your switch has a module capable of providing inline power to end stations, you can set each interface on the module to automatically detect and apply inline power if the end station requires power.
To set an interface to automatically detect an end station requiring power, and apply the inline power, perform this procedure:
If you set a non-inline-power-capable interface to automatically detect and apply power, an error message indicates that the configuration is not valid.
This example shows how to set the Fast Ethernet interface 5/8 to automatically detect inline power and send power through that interface.
Switch# configure terminalEnter configuration commands, one per line. End with CNTL/Z.Switch(config)# interface fastethernet 5/8Switch(config-if)# power inline autoSwitch(config-if)# endThis example shows how to verify the inline power configuration for the Fast Ethernet interface 5/8.
Switch# show power inline fastethernet 5/8Interface Admin Oper Power ( mWatt ) Device-------------------- ----- ---------- --------------- -----------FastEthernet5/8 auto on 400 cisco phone deviceSwitch#If a Cisco IP phone is connected to an interface with external power, the switch does not recognize the phone. The Device column in the show power inline command displays as unknown.
The following example shows to configure an interface so that it never supplies power through the interface.
Switch# configure terminalEnter configuration commands, one per line. End with CNTL/Z.Switch(config)# interface fastethernet 5/2Switch(config-if)# power inline neverSwitch(config-if)# end
