Catalyst 2960-S Switch Hardware Installation Guide
Switch Installation
Downloads: This chapterpdf (PDF - 1.82MB) The complete bookPDF (PDF - 5.29MB) | Feedback

Switch Installation

Table Of Contents

Switch Installation

Preparing

Safety Warnings

Installation Guidelines

Box Contents

Tools and Equipment

Verifying Switch Operation

Planning a Switch Stack

Stack Guidelines

Installing the FlexStack Module

Stack Cabling

Stack Bandwidth and Partitioning Examples

Power-On Sequence for Switch Stacks

Installing the Switch

Rack-Mounting

Attaching the Rack-Mount Brackets

Mounting in a Rack

Wall-Mounting

Attaching the Brackets for Wall-Mounting

Attaching the RPS Connector Cover

Mounting on a Wall

Table- or Shelf-Mounting

After Switch Installation

Connecting the FlexStack Cables

Installing the Power Cord Retainer (Optional)

Installing SFP and SFP+ Modules

Installing an SFP or SFP+ Module

Removing an SFP or SFP+ Module

Connecting to SFP and SFP+ Modules

Connecting to Fiber-Optic SFP and SFP+ Modules

Connecting to 1000BASE-T SFP

10/100 and 10/100/1000 PoE+ Port Connections

10/100 and 10/100/1000 Port Connections

Where to Go Next


Switch Installation


Read these topics and perform the procedures in this order:

Preparing

Planning a Switch Stack

Installing the Switch

Connecting the FlexStack Cables

Installing the Power Cord Retainer (Optional)

Installing SFP and SFP+ Modules

Connecting to SFP and SFP+ Modules

10/100 and 10/100/1000 PoE+ Port Connections

10/100 and 10/100/1000 Port Connections

For initial switch setup, assigning the switch IP address, and powering on information, see the switch getting started guide on Cisco.com.

Preparing

Safety Warnings

Installation Guidelines

Box Contents

Tools and Equipment

Safety Warnings

This section includes the basic installation caution and warning statements. Read this section before you start the installation procedure. Translations of the warning statements appear in the Regulatory Compliance and Safety Information for the Catalyst 2960 and 2960-S Switches guide on the documentation CD and online at Cisco.com.


Warning Do not stack the chassis on any other equipment. If the chassis falls, it can cause severe bodily injury and equipment damage. Statement 48

Warning Ethernet cables must be shielded when used in a central office environment. Statement 171

Warning If a redundant power system (RPS) is not connected to the switch, install an RPS connector cover on the back of the switch. Statement 265

Warning Attach only the following Cisco RPS model to the RPS receptacle:
PWR-RPS2300 Statement 370

Warning Read the wall-mounting instructions carefully before beginning installation. Failure to use the correct hardware or to follow the correct procedures could result in a hazardous situation to people and damage to the system. Statement 378

Warning Read the installation instructions before connecting the system to the power source. Statement 1004

Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety:
- This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
- When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.
- If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack. Statement 1006

Warning Class 1 laser product. Statement 1008

Warning This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security. Statement 1017

Warning This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available. Statement 1024

Warning This unit might have more than one power supply connection. All connections must be removed to de-energize the unit. Statement 1028

Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030

Warning Ultimate disposal of this product should be handled according to all national laws and regulations. Statement 1040

Warning For connections outside the building where the equipment is installed, the following ports must be connected through an approved network termination unit with integral circuit protection: 10/100/1000 Ethernet. Statement 1044

Warning To prevent the system from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature of:
<113°F (45°C). Statement 1047

Warning This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071

Warning Voltages that present a shock hazard may exist on Power over Ethernet (PoE) circuits if interconnections are made using uninsulated exposed metal contacts, conductors, or terminals. Avoid using such interconnection methods, unless the exposed metal parts are located within a restricted access location and users and service people who are authorized within the restricted access location are made aware of the hazard. A restricted access area can be accessed only through the use of a special tool, lock and key or other means of security. Statement 1072

Warning No user-serviceable parts inside. Do not open. Statement 1073

Warning Installation of the equipment must comply with local and national electrical codes. Statement 1074

Warning To prevent airflow restriction, allow clearance around the ventilation openings to be at least:
3 inches (7.6 cm). Statement 1076

Installation Guidelines

When determining where to install the switch, verify that these guidelines are met:

Clearance to the switch front and rear panel meets these conditions:

Front-panel LEDs can be easily read.

Access to ports is sufficient for unrestricted cabling.

AC power cord can reach from the AC power outlet to the connector on the switch rear panel.

Access to the rear of the rack is sufficient for connecting StackWise cables to stacked switches, or connecting the optional Cisco Redundant Power Supply (RPS) 2300

Cabling is away from sources of electrical noise, such as radios, power lines, and fluorescent lighting fixtures. Make sure the cabling is safely away from other devices that might damage the cables.

Airflow around the switch and through the vents is unrestricted.

Temperature around the unit does not exceed 113°F (45°C). If the switch is installed in a closed or multirack assembly, the temperature around it might be greater than normal room temperature. Operating environment is within the ranges listed in "Technical Specifications."

Humidity around the switch does not exceed 85 percent.

Altitude at the installation site is not greater than 10,000 feet.

For 10/100 and 10/100/1000 fixed ports, the cable length from a switch to a connected device cannot exceed 328 feet (100 meters).

For cable lengths for SFP-module connections, see the "Cables and Adapters" section.

Cooling mechanisms, such as fans and blowers in the switch, can draw dust and other particles causing contaminant buildup inside the chassis, which can result in system malfunction. You must install this equipment in an environment as free from dust and foreign conductive material (such as metal flakes from construction activities) as is possible.

Box Contents

The switch getting started guide describes the box contents. If any item is missing or damaged, contact your Cisco representative or reseller for support.

Tools and Equipment

Obtain these necessary tools and equipment:

A number-2 Phillips screwdriver to rack-mount the switch.

A flathead screwdriver to remove the stack module cover, if applicable.

Verifying Switch Operation

Before you install the switch in a rack, on a wall, or on a table or shelf, power on the switch and verify that it passes POST.

To power on the switch, plug one end of the AC power cord into the switch AC power connector, and plug the other end into an AC power outlet.

As the switch powers on, it begins the POST, a series of tests that runs automatically to ensure that the switch functions properly. LEDs can blink during the test. POST lasts approximately 1 minute. When the switch begins POST, the System, RPS, Status, Duplex, and Speed LEDs turn green. The System LED blinks green, and the other LEDs remain solid green.

When the switch completes POST successfully, the System LED remains green. The RPS LED remains green for some time and then reflects the switch operating status. The other LEDs turn off and then reflect the switch operating status. If a switch fails POST, the System LED turns amber.

POST failures are usually fatal. Call Cisco technical support representative if your switch fails POST.

After a successful POST, unplug the power cord from the switch. Install the switch in a rack, on a wall, on a table, or on a shelf as described in the "Installing the Switch" section.

If your configuration has an RPS, connect the switch and the RPS to different AC power sources. See the Cisco RPS documentation for information.


Note When you connect the RPS to the switch, put the RPS in standby mode. Set the RPS to active mode during normal operation.



Warning Attach only the following Cisco RPS model to the RPS receptacle: PWR-RPS2300 = Statement 370

Planning a Switch Stack


Note This section applies only to the Catalyst 2960-S stacking-capable switches.


Stack Guidelines

Connect only Catalyst 2960-S switches in a switch stack. You cannot stack the Catalyst 2960-S with other switches such as the Catalyst 2975, 3550, 3560, or 3750 switches.

Stack only up to four switches.

Install the FlexStack module and the FlexStack cable. You can order them from your Cisco sales representative: C2960S-STACK=.


Note The FlexStack module is hot-swappable and can be inserted while the switch is powered on.


Order the appropriate cable from your Cisco sales representative. The length of FlexStack cable depends on your configuration. These are the different sizes available:

CAB-STK-E-0.5M= (0.5-meter cable)

CAB-STK-E-1M= (1-meter cable)

CAB-STK-E-3M= (3-meter cable)

Access to the switch rear panel and to the rear of the rack.

Installing the FlexStack Module


Step 1 Use a flat-blade screwdriver to remove the FlexStack module blank cover on the switch back panel.

Figure 2-1 Removing the Blank Cover

Step 2 Grasp the FlexStack module on the sides, and insert it into the module slot. Push the module in completely until you feel it snap into place.

Figure 2-2 Inserting the FlexStack Module

Step 3 Secure the screws tightly on each side of the module.

Figure 2-3 Securing the FlexStack Module


Note Make sure the screws are only finger-tight to avoid overtightening.



Stack Cabling

Figure 2-5 and Figure 2-6 show the switches stacked in a vertical rack or on a table. The connections are redundant.

Figure 2-4 Stacking Switches with the 0.5-meter FlexStack Cable

Figure 2-5 Stacking Switches with 0.5-meter and 3-meter FlexStack Cables

Stack Bandwidth and Partitioning Examples

Figure 2-6 shows a stack that provides full bandwidth with redundant connections.

Figure 2-6 Stack with Full Bandwidth Connections

Figure 2-7 shows a stack with incomplete stack cabling connections. This stack provides only half bandwidth and does not have redundant connections.

Figure 2-7 Stack with Half Bandwidth Connections

Figure 2-8 shows a stack with a bad FlexStack cable in link B. This stack provides only half bandwidth and does not have redundant connections.

Figure 2-8 Stack with a Failover Condition

Figure 2-9 shows a stack with a bad link B. This stack partitions into two stacks, and switch 1 and
switch 3 are stack masters.

Figure 2-9 Partitioned Stack with a Failover Condition

Power-On Sequence for Switch Stacks

Consider these guidelines before you power on the switches in a stack:

The sequence in which the switches are first powered on might affect the switch that becomes the stack master.

If you want a particular switch to be the stack master, power on that switch first. This switch becomes the stack master and remains the stack master until a master re-election. After 2 minutes, power on the other stack switches.

If you have no preference as to which switch becomes the stack master, power on all the switches in the stack within a 1-minute timeframe. These switches participate in the stack master election. Switches powered on after the 1-minute timeframe do not participate in the election.

Power off a switch before you add it to or remove it from an existing switch stack.

For conditions that can cause a stack master re-election or to manually elect the stack master, see the "Managing Switch Stacks" chapter in the switch software configuration guide on Cisco.com.

Installing the Switch

Rack-Mounting

Wall-Mounting

Table- or Shelf-Mounting

After Switch Installation

Rack-Mounting

Installation in other than 19-inch racks requires a bracket kit not included with the switch. Figure 2-10 shows the standard 19-inch brackets and ETSI mounting brackets. You can order the ETSI bracket from your Cisco sales representative:700-19781XX


Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety:
- This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
- When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.
- If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack. Statement 1006

Figure 2-10 Rack-Mounting Brackets

Attaching the Rack-Mount Brackets

To rack-mount the switch, first remove the screws from the switch chassis so that the mounting brackets can be attached.


Note You do not need to remove the screws for attaching the brackets in the rear-mounting position.


Figure 2-11 Removing Screws from the Switch

Use four Phillips flat-head screws to attach the long side of the bracket to each side of the switch (Figure 2-12).

Figure 2-12 Attaching Brackets for 19-inch Racks

1

Front-mounting position

3

Mid-mounting position

2

Number-8 Phillips flat-head screws (48-0655-01)

4

Rear-mounting position


Mounting in a Rack

After the brackets are attached, use the four supplied Phillips machine screws to attach the brackets to the rack (Figure 2-13). Use the black Phillips machine screw to attach the cable guide to the left or right bracket.

When you complete the switch installation, see the "After Switch Installation" section for information on switch configuration.

Figure 2-13 Mounting in a Rack

1

Cable guide

4

Number-12 Phillips pan-head screws (48-0523-01)

2

Phillips machine screw, black (48-0654-01)

5

Mid-mounting position

3

Front-mounting position

6

Rear-mounting position


Wall-Mounting

Attaching the Brackets for Wall-Mounting

Attaching the RPS Connector Cover

Mounting on a Wall


Warning Read the wall-mounting instructions carefully before beginning installation. Failure to use the correct hardware or to follow the correct procedures could result in a hazardous situation to people and damage to the system. Statement 378

Attaching the Brackets for Wall-Mounting

Figure 2-14 shows how to attach a 19-inch bracket to one side of the switch. Follow the same steps to attach the second bracket to the opposite side.

Figure 2-14 Attaching the 19-inch Brackets for Wall-Mounting

1

Phillips truss-head screws (48-0656-01)


Attaching the RPS Connector Cover


Note The Catalyst 2960S-F48FPS-L, 2960S-F48LPS-L, 2960S-F24PS-L, 2960S-F48TS-L, 2960S-F24TS-L, 2960S-F48TS-S, and 2960S-F24TS-S switches do not have an RPS connector and a cover is not needed. These models do not support RPS.


If you are not using an RPS with your switch, use the two Phillips pan-head screws to attach the RPS connector cover to the back of the switch (Figure 2-15).


Warning If an RPS is not connected to the switch, install an RPS connector cover on the back of the switch. Statement 265

Figure 2-15 Attaching the RPS Connector Cover

1

Phillips pan-head screws (48-0482-01)

3

RPS connector

2

RPS connector cover

   

Mounting on a Wall

For the best support of the switch and cables, make sure that the switch is attached securely to wall studs or to a firmly attached plywood-mounting backboard. Mount the switch with the front panel facing up or front facing down (Figure 2-16).

Figure 2-16 Mounting on a Wall

1

User-supplied screws


When you complete the switch installation, see the "After Switch Installation" section for information on switch configuration.

Table- or Shelf-Mounting

To install the switch on a table or shelf, locate the adhesive strip with the rubber feet in the mounting-kit envelope. Attach the four rubber feet to the recessed areas on the bottom of the chassis. Place the switch on the table or shelf near an AC power source.

When you complete the switch installation, see the "After Switch Installation" section for information on switch configuration.

After Switch Installation

Configure the switch by running Express Setup to enter the initial switch configuration. See the switch getting started guide in the "Related Publications" section.

Use the CLI setup program to enter the initial switch configuration. See "Configuring the Switch with the CLI-Based Setup Program."

Connect to the stack ports. See the "Connecting the FlexStack Cables" section.

Install the power cord retainer (optional). See the "Installing the Power Cord Retainer (Optional)" section.

Connect to the front-panel ports. See the "Installing SFP and SFP+ Modules" section, the "10/100 and 10/100/1000 PoE+ Port Connections" section, and the "10/100 and 10/100/1000 Port Connections" section.


Connecting the FlexStack Cables

Always use a Cisco-approved FlexStack cable to connect the switches.


Note Connect only Catalyst 2960-S switches in a switch stack.



Step 1 Remove the dust covers from the FlexStack cables, and store them for future use.

Figure 2-17 Connect the FlexStack Cables

Step 2 Insert one end of the FlexStack cable into the stack port of the first switch. Insert the other end of the cable into the stack port on the other switch. Make sure you insert the cables in completely until you feel them snap into place.


Note When you connect the FlexStack cable to the STACK 1 port, the tab should be above the connector. When you connect the FlexStack cable to the STACK 2 port, the tab should be below the connector.



To remove a FlexStack cable, grasp the tab on the cable connector and gently pull straight out. When you remove the FlexStack cables from the connectors, replace the dust covers to protect them from dust.


Caution Removing and installing the FlexStack cable can shorten its useful life. Do not remove and insert the cable more often than is absolutely necessary.

Installing the Power Cord Retainer (Optional)

The power cord retainer part number (PWR-CLP=) is optional. You can order it when you order your switch, or you can order it later from your Cisco representative.


Step 1 Choose the sleeve size of the power cord retainer based on the thickness of the cord. The smaller sleeve can be snapped off and used for thin cords. See Figure 2-21.

Step 2 Slide the retainer around the AC power cord, and pass it around the loop on the switch. See Figure 2-18.

Figure 2-18 Inserting the Retainer through the Lanced Loop

1

AC power cord

3

Sleeve for thinner power cords

2

Power cord retainer

4

Loop


Step 3 Slide the retainer through the first latch. See Figure 2-19.

Figure 2-19 Sliding the Retainer Through the Latch

1

AC power cord

3

Latch

2

Smaller sleeve for thin power cords

   

Step 4 Slide the retainer through the other latches to lock it. See Figure 2-20.

Figure 2-20 Locking the Retainer

1

AC power cord

3

Latches

2

Sleeve for thin power cords

   

Step 5 (Optional) Use the small sleeve for thin power cords. Use the small sleeve to provide greater stability for thin cords. Detach the sleeve, and slide it over the power cord. See Figure 2-21.

Figure 2-21 Sleeve Around the Power Cord

1

Sleeve for thin power cords

2

AC power cord


Step 6 Secure the AC power cord by pressing on the retainer. See Figure 2-22.

Figure 2-22 Securing the Power Cord in the Retainer

Installing SFP and SFP+ Modules

Some switch models support SFP modules, SFP+ modules, or both. The SFP slots support only the SFP modules. The slots marked SFP+ slots support both SFP and SFP+ modules.

See the "SFP and SFP+ Module Slots" section and the switch release notes on Cisco.com for the list of supported SFP modules. Use only Cisco SFP modules on the switch. Each Cisco module has an internal serial EEPROM that is encoded with security information. This encoding provides a way for Cisco to identify and validate that the module meets the requirements for the switch.

For information about installing, removing, cabling, and troubleshooting SFP modules, see the module documentation that shipped with your device. For module cable specifications, see "Connector and Cable Specifications."

Installing an SFP or SFP+ Module

When installing SFP or SFP+ modules, observe these guidelines:

Do not remove the dust plugs from the modules or the rubber caps from the fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the module ports and cables from contamination and ambient light.

Removing and installing an SFP or SFP+ module can shorten its useful life. Do not remove and insert any module more often than is absolutely necessary.

To prevent ESD damage, follow your normal board and component handling procedures when connecting cables to the switch and other devices.


Step 1 Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface.

Step 2 Find the send (TX) and receive (RX) markings on the module top.

On some SFP or SFP+ modules, the send and receive (TX and RX) markings might be replaced by arrows that show the direction of the connection, either send or receive (TX or RX).

Step 3 If the module has a bale-clasp latch, move it to the open, unlocked position.

Step 4 Align the module in front of the slot opening, and push until you feel the connector snap into place.

Step 5 If the module has a bale-clasp latch, close it.

Step 6 For fiber-optic SFP or SFP+ modules, remove the dust plugs and save.

Step 7 Connect the SFP cables.

Figure 2-23 Installing an SFP Module


Removing an SFP or SFP+ Module


Step 1 Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface.

Step 2 Disconnect the cable from the SFP module. For reattachment, note which cable connector plug is send (TX) and which is receive (RX).

Step 3 Insert a dust plug into the optical ports of the SFP or SFP+ module to keep the optical interfaces clean.

Step 4 If the module has a bale-clasp latch, pull the bale out and down to eject the module. If the latch is obstructed and you cannot use your finger, use a small, flat-blade screwdriver or other long, narrow instrument to open the latch.

Step 5 Grasp the SFP or SFP+ module, and carefully remove it from the module slot.

Step 6 Place the module in an antistatic bag or other protective environment.


Connecting to SFP and SFP+ Modules

For instructions on how to connect to fiber-optic SFP modules, see the "Connecting to Fiber-Optic SFP and SFP+ Modules" section. For instructions on how to connect to copper 1000BASE-T SFP modules, see the "Connecting to 1000BASE-T SFP" section.

For instructions about how to install or remove an SFP module, see the "Installing SFP and SFP+ Modules" section.

Connecting to Fiber-Optic SFP and SFP+ Modules


Warning Class 1 laser product. Statement 1008

Caution Do not remove the rubber plugs from the SFP or SFP+ module port or the rubber caps from the fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the SFP module ports and cables from contamination and ambient light.
Before connecting to the SFP module, be sure that you understand the port and cabling stipulations in the "Installation Guidelines" section and in the "SFP and SFP+ Module Slots" section. See "Connector and Cable Specifications" for information about the LC on the SFP module.


Step 1 Remove the rubber plugs from the module port and fiber-optic cable, and store them for future use.

Step 2 Insert one end of the fiber-optic cable into the SFP or SFP+ module port (see Figure 2-24).

Figure 2-24 Connecting to a Fiber-Optic SFP Module Port

1

LC connector


Step 3 Insert the other cable end into a fiber-optic receptacle on a target device.

Step 4 Observe the port status LED.

The LED turns green when the switch and the target device have an established link.

The LED turns amber while the STP discovers the network topology and searches for loops. This process takes about 30 seconds, and then the port LED turns green.

If the LED is off, the target device might not be turned on, there might be a cable problem, or there might be problem with the adapter installed in the target device. See Chapter 3 "Troubleshooting," for solutions to cabling problems.

Step 5 If necessary, reconfigure and restart the switch or target device.


Connecting to 1000BASE-T SFP


Caution To prevent ESD damage, follow your normal board and component handling procedures.


Step 1 Connect one end of the cable to the SFP module port (see Figure 2-25). When connecting to servers, workstations, and routers, use a four twisted-pair, straight-through cable. When connecting to switches or repeaters, use a four twisted-pair, crossover cable.

When connecting to a 1000BASE-T device, be sure to use a four twisted-pair, Category 5 or higher cable.


Note The automatic medium-dependent interface crossover (auto-MDIX) feature is enabled by default. For configuration information for this feature, see the switch software configuration guide or the switch command reference on Cisco.com.


Figure 2-25 Connecting to a 1000BASE-T SFP Module

 

1

RJ-45 connector


Step 2 Connect the other end of the cable to an RJ-45 connector on the other device.

Step 3 Observe the port status LED.

The LED turns green when the switch and the other device have an established link.

The LED turns amber while the STP discovers the network topology and searches for loops. This process takes about 30 seconds, and then the port LED turns green.

If the LED is off, the other device might not be turned on, there might be a cable problem, or there might be a problem with the adapter in the other device. See Chapter 3 "Troubleshooting," for solutions to cabling problems.

Step 4 If necessary, reconfigure and restart the switch or other device.


10/100 and 10/100/1000 PoE+ Port Connections

See the "10/100 PoE+ Ports" section and the "10/100/1000 PoE+ Ports" section for information on the cables and connectors.

The ports provide PoE support for devices compliant with IEEE 802.3af and also provide Cisco prestandard PoE support for Cisco IP Phones and Cisco Aironet Access Points.

On a per-port basis, you can control whether or not a port automatically provides power when an IP phone or an access point is connected.

To access an advanced PoE planning tool, use the Cisco Power Calculator available on Cisco.com at this URL:

http://tools.cisco.com/cpc/launch.jsp

You can use this application to calculate the power supply requirements for a specific PoE configuration. The results show output current, output power, and system heat dissipation.


Warning Voltages that present a shock hazard may exist on Power over Ethernet (PoE) circuits if interconnections are made using uninsulated exposed metal contacts, conductors, or terminals. Avoid using such interconnection methods, unless the exposed metal parts are located within a restricted access location and users and service people who are authorized within the restricted access location are made aware of the hazard. A restricted access area can be accessed only through the use of a special tool, lock and key or other means of security. Statement 1072

Caution Category 5e and Category 6 cables can store high levels of static electricity. Always ground the cables to a suitable and safe earth ground before connecting them to the switch or other devices.


Step 1 Connect one end of the cable (Table 2-1) to the switch PoE port.

Step 2 Connect the other end of the cable to an RJ-45 connector on the other device. The port LED turns on when both devices have established link.

The port LED is amber while STP discovers the topology and searches for loops. This process takes about 30 seconds, and then the port LED turns green. If the LED is off, the other device might not be turned on, there might be a cable problem, or there might be a problem with the adapter in the other device. See Chapter 3 "Troubleshooting," for solutions to cabling problems.


Caution Noncompliant cabling or powered devices can cause a PoE port fault. Use only standard-compliant cabling to connect Cisco prestandard IP Phones and wireless access points or IEEE 802.3af-compliant devices. You must remove any cable or device that causes a PoE fault.

Step 3 Reconfigure and reboot the connected device if needed.

Step 4 Repeat Steps 1 through 3 to connect each device.



Note Many legacy powered devices, including older Cisco IP phones and access points that do not fully support IEEE 802.3af, might not support PoE when connected to the switches by a crossover cable.


The autonegotiation and the auto-MDIX features are enabled by default on the switch.

With autonegotiation, the switch port configurations change to operate at the speed of the attached device. If the attached device does not support autonegotiation, you can manually set the switch interface speed and duplex parameters.

With auto-MDIX, the switch detects the required cable type for copper Ethernet connections and configures the interface accordingly. If auto-MDIX is disabled, use Table 2-1 to select the correct cable.

See the "Cables and Adapters" section for pinout descriptions.

Table 2-1 Recommended Ethernet Cables (When Auto-MDIX is Disabled) 

Device
Crossover Cable 1
Straight-Through Cable 1

Switch to switch

Yes

No

Switch to hub

Yes

No

Switch to computer or server

No

Yes

Switch to router

No

Yes

Switch to IP phone

No

Yes

1 100BASE-TX and 1000BASE-T traffic requires twisted four-pair, Category 5, Category 5e, or Category 6 cable. 10BASE-T traffic can use Category 3 or Category 4 cable.


10/100 and 10/100/1000 Port Connections

The switch 10/100 and 10/100/1000 port configuration changes to operate at the speed of the attached device. If the attached ports do not support autonegotiation, you can manually set the speed and duplex parameters. Connecting devices that do not autonegotiate or that have the speed and duplex parameters manually set can reduce performance or result in no linkage.

To maximize performance, choose one of these methods for configuring the Ethernet ports:

Let the ports autonegotiate both speed and duplex.

Set the interface speed and duplex parameters on both ends of the connection.

Use the guidelines in Table 2-1 to select the correct cable for connecting the switch 10/100 and 10/100/1000 ports to other devices. See the "Connector and Cable Specifications" section for cable-pinout descriptions.

Where to Go Next

To change the switch settings, you can use the switch default configuration or use any of the management options described in the "Management Options" section.