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This chapter contains the steps to install the switch. Please read the topics and follow the steps in the following order:
•Installing and Removing SFP Modules
•Inserting and Removing the SFP Module Patch Cable
•Replacing the SD Flash Memory Card
•Connecting Devices to the Ethernet Ports
These warnings are translated into several languages in the Regulatory Compliance and Safety Information for the Cisco CGS 2520 document that ships on the documentation CD.
These warning statements apply to all the switches:
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. Statement 1001 |
Warning Read the installation instructions before you connect the system to its power source. Statement 1004 |
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 To prevent the system from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature of: 140°F (60°C) Statement 1047 |
Warning Installation of the equipment must comply with local and national electrical codes. Statement 1074 |
Note For U.S. installations, refer to national electrical code ANSI/NFPA 70.
Warning To prevent airflow restriction, allow clearance around the ventilation openings to be at least: 1.75 in. (4.4 cm). Statement 1076 |
Before installing the switch, verify that these guidelines are met:
•Cabling must be kept away from sources of electrical noise, such as radios, power lines, and fluorescent lighting fixtures. Make sure that the cabling is away from other devices that might damage the cables.
•Operating environment is within the ranges listed in Technical Specifications, page A-1
•Relative humidity around the switch does not exceed 95 percent (noncondensing).
•Altitude at the installation site is not higher than 10,000 feet.
•For 10/100 and 10/100/1000 fixed ports, cable lengths from the switch to connected devices are not more than 328 feet (100 meters).
•For cable lengths for small-form-factor pluggable (SFP)-module connections, see the SFP Module Cables, page B-4 and the module documentation.
•Airflow around the switch and through the vents is unrestricted. To prevent overheating, the switch must meet the minimum clearance of 1.75 inches (4.4 cm) at the top and bottom. For clearances needed for wall mounting, see specifications in Wall-Mounting.
Note If the switch is installed in a closed or multirack assembly, take into consideration that the temperature around the switch might be greater than normal room temperature and that special accommodations in clearance must be made.
Before installing the switch in a rack or on a wall, you should power on the switch and verify that the switch passes the power-on self-test (POST).
To wire the switch to the power source, see Power Supply Installation
When the switch begins POST, the System LED blinks green, and the other LEDs stay green. When the switch passes POST, the System LED turns green. The other LEDs turn off and return to their operating status. If the switch fails POST, the System LED is amber.
Note Contact Cisco Systems immediately if your switch fails POST.
After a successful POST, disconnect the power from the switch. For more information, see Power Supply Installation See the Installing the Switch to install the switch into a rack or onto a wall.
The following installation information is covered in this section:
Note After the switch is mounted onto the rack, connect the power source to the switch. See Power Supply Installation
The following mounting procedures are explained in this section:
•Attaching Brackets for 19-Inch Racks
•Attaching Brackets for 19-Inch Racks (IP-30 Compliance)
•Attaching Brackets for 23-Inch Racks
•Attaching Brackets for ETSI Racks
•Mounting the Switch into a Rack
Figure 2-1 shows the 19-inch rack mounting brackets.
Figure 2-1 19-inch Mounting Brackets
Figure 2-2 shows the 23-inch rack mounting brackets.
Figure 2-2 23-inch Mounting Brackets
Figure 2-3 shows the ETSI rack mounting brackets.
Figure 2-3 ETSI Mounting Brackets
Figure 2-4 and Figure 2-5 shows the 19-inch rack mounting bracket locations on the switch for cable-side mounting and power-side mounting onto an 19-inch rack.
Figure 2-4 Attaching Brackets for 19-Inch Racks
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Mid-mount position |
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Cable-side mounting position |
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Phillips flat-head screws |
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Power supply-side mounting position |
Figure 2-5 Attaching Brackets for 19-Inch Racks
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Phillips flat-head screws |
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Power supply-side mounting position |
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Cable-side-mounting position |
Before installing the mounting brackets, you need to install the rubber plugs into the unused mounting holes of the switch chassis. You can get the appropriate rubber plugs by ordering kit CGS-2520-IP30KIT.
Follow the procedure below to install the rubber plugs.
Step 1 Determine whether you will install using the mid-mount, cable-side, or power supply-side positioning by identifying your bracket mounting positions shown in Figure 2-9 and Figure 2-10.
Step 2 Insert the rubber plugs into the appropriate holes according to your mount position as shown in Figure 2-6 and Figure 2-7. Follow the same procedure for both sides of the switch.
Figure 2-6 Inserting the Rubber Plugs
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Rubber plug |
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Cable-side mounting position |
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Mid-mount position |
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Power supply-side mounting position |
Figure 2-7 Inserting the Rubber Plugs
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Rubber plug |
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Power supply-side mounting position |
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Cable-side mounting position |
Step 3 Use a screwdriver or pen to completely push in the rubber plugs. Figure 2-8 shows a close-up of the rubber plug and how they are inserted into the mounting holes.
Figure 2-8 Inserting the Rubber Plugs (detail)
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Rubber plug |
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Screwdriver |
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Switch |
Step 4 Install the brackets on both sides of the switch as shown in Figure 2-9 and Figure 2-10.
Figure 2-9 Attaching Brackets for 19-Inch Racks
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Mid-mount position |
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Cable-side mounting position |
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Phillips flat-head screws |
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Power supply-side mounting position |
Figure 2-10 Attaching Brackets for 19-Inch Racks
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Phillips flat-head screws |
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Power supply-side mounting position |
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Cable-side-mounting position |
Note For IP-30 compliance: If you use 23-inch brackets or ETSI brackets, you can insert the rubber plugs in the same holes as shown in Figure 2-6 and Figure 2-7 before installing the brackets.
Figure 2-11 shows the 23-inch rack mounting bracket locations on the switch for cable-side mounting and power-side mounting onto a 23-inch rack.
Figure 2-11 Attaching Brackets for 23-Inch Racks
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Phillips flat-head screws |
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Power supply-side mounting position |
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Cable-side-mounting position |
Note For IP-30 compliance: If you use 23-inch brackets, you can insert the rubber plugs in the same holes as shown in Figure 2-7 or Figure 2-8 before installing the brackets.
Figure 2-12 shows the mounting bracket locations on the switch for cable-side mounting and power-side mounting onto an ETSI rack.
Figure 2-12 Attaching Brackets for ETSI Racks
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Phillips flat-head screws |
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Power supply-side mounting position |
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Cable-side mounting position |
Note For IP-30 compliance: If you use ETSI brackets, you can insert the rubber plugs in the same holes as shown in Figure 2-7 or Figure 2-8 before installing the brackets.
After you attach the brackets onto the switch, use the four supplied number-12 Phillips machine screws to attach the brackets to the rack as shown in Figure 2-13. (Brackets for the 19-inch rack shown in this example.)
Note We recommend attaching the cable guide to prevent the cables from obscuring the LED panels on the devices in the rack. Use the supplied black screw shown in Figure 2-13 [6] to attach the cable guide to the left or right bracket.
Figure 2-13 Rack Mounting
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Mid-mount position |
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Phillips machine screws |
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Cable screw |
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Power supply-side mounting position |
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Cable-side mounting position |
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Cable guide |
The following steps are covered in this section:
•Attaching Brackets for Wall Mounting
•Wall-Mounting (for IP-30 Compliance)
Follow these steps to mount the switch onto a wall.
Step 1 Insert the rubber plugs into the appropriate holes. Follow the same procedure for the other side of the switch.
Step 2 Use a screwdriver or pen to completely push in the rubber plugs (see Figure 2-8).
Step 3 Install the brackets onto both sides of the switch (see Figure 2-16).
Step 4 Secure the bracket and switch to the wall using the screws provided.
Figure 2-14 shows how to wall-mount the switch onto a wall.
Figure 2-14 Attaching 19-inch Rack Brackets for Wall Mounting
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Phillips truss-head screws |
Follow these steps to mount the switch onto a wall and conform to IP-30 Compliance regulations.
Step 1 Insert the rubber plugs into the appropriate holes (see Figure 2-15). Follow the same procedure for the other side of the switch.
Step 2 Use a screwdriver or pen to completely push in the rubber plugs (see Figure 2-8).
Figure 2-15 Inserting the Rubber Plugs into the Switch Holes
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Rubber plug |
Step 3 Install the brackets on both sides of the switch (see Figure 2-16).
Figure 2-16 Attaching 19-inch Rack Brackets
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Phillips truss-head screws |
Small-form-factor pluggable (SFP) modules provide the uplink optical interfaces, laser send (TX) and laser receive (RX).
When installing or removing SFP modules, observe these guidelines:
•Removing and installing an 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.
Warning Class 1 laser product. Statement 1008 |
This section describes how to install Small Form Factor pluggable (SFP) modules. SFP modules are inserted into the SFP modules connected to the switch.
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.
Note On some SFP modules, the send and receive (TX and RX) markings might be replaced by arrows that show the direction (send or receive) of the connection.
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 insert until you feel the connector snap into place.
Step 5 If the module has a bale-clasp latch, close it to lock it into place.
Step 6 For fiber-optic SFP modules, remove the dust plugs and store them in a clean location for reuse.
Step 7 Connect the SFP cables.
Figure 2-17 Installing an SFP Module
This section describes how to replace small-form-factor pluggable (SFP) modules. SFP modules are inserted into the SFP modules connected to the switch.
Step 1 Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface.
Step 2 Disconnect the cables from the SFP module ports. For reattachment, note which cable connector plug is send (TX) and which is receive (RX).
Note On some SFP modules, the send and receive (TX and RX) markings might be replaced by arrows that show the direction (send or receive) of the connection.
Step 3 Insert a dust plug into the optical ports of the SFP module.
Step 4 If the module has a bale-clasp latch, pull the bale out and down to eject it. If the latch is obstructed and you cannot use your finger, use a small, flat-blade screwdriver or other long, narrow instrument.
Figure 2-18 Removing a Bale Clasp Latch SFP Module
Step 5 Grasp the SFP module, and carefully remove it from the slot.
Step 6 Place the module in an anti-static bag or other protective environment.
Step 1 Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface.
Step 2 Insert the SFP module patch cable into the slot until you feel the connector on the cable snap into place at the rear of the slot (see Figure 2-19).
Figure 2-19 Inserting an SFP Module Patch Cable
Step 3 Repeat these steps for the second switch that you want to connect to the first switch.
Figure 2-20 Connecting Two Switches with an SFP Module Patch Cable
To remove an SFP module patch cable from the SFP module slot, release the connector, and pull it from the slot.
Step 1 Locate the Secure Digital (SD) flash memory card slot on the cable-side of the switch.
Step 2 Use a number 1 Phillips screwdriver to loosen the captive screw (see Figure 2-21).
Figure 2-21 Loosening the Captive Screw
Step 3 Pull the cover open, and pull the cover tabs from the hinge (see Figure 2-22).
Figure 2-22 Removing the SD Slot Cover
Step 4 Gently push the SD flash memory card to eject it (see Figure 2-23). Place it in an antistatic bag to protect it from static discharge.
Figure 2-23 Removing the SD Flash Memory Card
.
Step 5 Push the replacement card (upside down) into the slot, and press it firmly in place. The card is keyed so that you cannot insert it the wrong way.
Step 6 Begin replacing the cover by placing the SD slot cover tabs into the hinge.
Step 7 Close the cover, and use a ratcheting torque number 1 Phillips screwdriver to torque the screw to 4.5 in-lb.
|
|
|
---|---|---|
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 uses Category 3 or Category 4 cable. |
This section covers the following procedures:
•Connecting to the 10/100 and 10/100/1000 Ports
•Connecting to the 10/100 PoE Ports
The 10/100 and 10/100/1000 Ethernet ports use standard RJ-45 connectors with Ethernet pinouts. The maximum cable length is 328 feet (100 meters). The 100BASE-TX and 1000BASE-T traffic requires Category 5, Category 5e, or Category 6 UTP cable. The 10BASE-T traffic uses Category 3 or Category 4 cable.
The auto-negotiation feature is enabled by default on the switch. At this setting, the switch ports configure themselves to operate at the speed of the attached device. If the device does not support auto-negotiation, you can set the switch port speed and duplex parameters. To maximize performance, either let the ports autonegotiate both speed and duplex, or set the port speed and duplex parameters on both ends of the connection.
For simplified cabling, the automatic medium-dependent interface crossover (auto-MDIX) feature is enabled by default. With auto-MDIX enabled, the switch detects the required cable type for copper Ethernet connections and configures the interface accordingly. Therefore, you can use either a crossover or a straight-through cable for connections to a 10/100/1000 Ethernet port, regardless of the type of connected device.
See the switch software configuration guide or the switch command reference on Cisco.com for more information about auto-negotiation and auto-MDIX.
If auto-MDIX is disabled, use the guidelines in Table 2-1 to select the cable for connecting the 10/100/1000 Ethernet ports to other devices.
See the Connector and Cable Specifications, page B-1 for cable-pinout descriptions.
Figure 2-24 Connecting to an Ethernet Port
The Cisco CGS-2520-16S-8PC switch (and the CGS-2520-16S-8PC-C switch) 10/100 PoE ports have the same auto-negotiation settings and cabling requirements as those in the Connecting to the 10/100 and 10/100/1000 Ports. These ports provide PoE power.
See the PoE Ports 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 to a connected IP phone or an access point.
To access an advanced PoE planning tool, use the Cisco Power Calculator on Cisco.com:
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 heat dissipation.
After the switch is mounted onto the rack, do the following:
•Wire the switch to a power source (see Power Supply Installation)
•For configuration instructions about the CLI setup program, see Configuring the Switch with the CLI Setup Program
•You can use the default configuration installed on the switch or use any of the management options described in the Management Options to change the switch settings