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The Cisco CGS 2520 switches, also referred to as the switch, are Ethernet switches that you can connect devices such as Intelligent Electronic Devices (IEDs), distributed controllers, substation routers, Cisco IP Phones, Cisco Wireless Access Points, and other network devices such as redundant substation switches.
This chapter contains the following topics:
Note The information in this document regarding China switches (part numbers ending with -C, for example, PWR-RGD-AC-DC-C) are identical to the non-China switches, except where specified.
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Cisco CGS-2520-24TC |
24 10/100 FastEthernet ports, two dual-purpose ports (two 10/100/1000BASE-T copper ports and two SFP1 module slots), and two AC and DC power supply module slots. |
Cisco CGS-2520-24TC-C |
(For China) 24 10/100 FastEthernet ports, two dual-purpose ports (two 10/100/1000BASE-T copper ports and two SFP module slots), and two AC and DC power supply module slots. |
Cisco CGS-2520-16S-8PC |
16 100BASE-FX SFP-module slots; eight 10/100 FastEthernet PoE2 ports, two dual-purpose ports (two 10/100/1000BASE-T copper ports and two SFP module slots), and two AC and DC power supply module slots. |
Cisco CGS-2520-16S-8PC-C |
(For China) 16 100BASE-FX SFP-module slots; eight 10/100 FastEthernet PoE ports, two dual-purpose ports (two 10/100/1000BASE-T copper ports and two SFP module slots), and two AC and DC power supply module slots. |
1 SFP = small-form-factor pluggable. 2 PoE = Power over Ethernet. |
The 10/100 Fast Ethernet downlink ports in Figure 1-1 are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left. Port 3 is above port 4, and so on. The dual-purpose ports are numbered 1 and 2.
Figure 1-1 Cisco CGS-2520-24TC Cable-Side View
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SD1 flash memory card slot |
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RJ-45 console port |
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LEDs |
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USB (mini-Type B) console port |
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Express Setup button |
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Power-input terminal |
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10/100 ports |
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Alarm port |
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Dual purpose ports |
1 SD = Secure Digital |
The100BASE-FX SFP ports and the 10/100 PoE ports are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left. Port 3 is above port 4, and so on. The dual-purpose ports are numbered 1 and 2.
Figure 1-2 Cisco CGS-2520-16S-8PC Cable-Side View
You can set the 10/100 ports on the switch to operate in any combination of half duplex, full duplex, or 10 or 100 Mb/s. You can set the ports for speed and duplex auto-negotiation. The default setting is auto-negotiate.
When set for auto-negotiation, the switch determines the speed and duplex settings of the attached device, and advertises its own capabilities. If the connected device also supports auto-negotiation, the switch negotiates the best connection (the fastest line speed that both devices support and full-duplex transmission if the attached device supports it), and configures itself accordingly. In all cases, the attached device must be within 328 feet (100 meters).
The 10/100 PoE ports on the Cisco CGS-2520-16S-8PC-C switches provide PoE support for devices that are compliant with IEEE 802.3af. The Cisco prestandard PoE is also supported for Cisco IP Phones and Cisco Aironet Access Points. The PoE ports on the switch deliver up to 15.4 W of PoE. Any four of the eight ports are designated as high priority PoE ports, while other four ports are designated as low priority PoE ports. When both the power supply modules are installed, the system has enough power to support all the eight ports as PoE ports. In case one of the power supply module fails, the power to the low priority PoE ports is dropped, while power to the high priority PoE ports remains uninterrupted.
On a per-port basis, you control whether or not a port automatically provides power when an IP phone or an access point is connected.
The 10/100 PoE ports use 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 unshielded twisted pair (UTP) cable. The 10BASE-T traffic can use Category 3 or
Category 4 UTP cable.
For information about configuring and monitoring PoE ports, see the switch software configuration guide on Cisco.com.
For information about port connections and port specifications, see the Connecting Devices to the Ethernet Ports and the Connector and Cable Specifications, page B-1.
Note The output of the PoE circuit has been evaluated as a Limited Power Source (LPS) per IEC 60950-1.
You can configure the dual-purpose ports on the switch as either 10/100/1000 ports or as SFP-module ports. You can set the 10/100/1000 ports to autonegotiate, or you can configure them as fixed 10, 100, or 1000 Mb/s (Gigabit) Ethernet ports.
By default, the switch selects the medium for each dual-purpose port (10/100/1000BASE-T or SFP). When a link is achieved on one media type, the switch disables the other media type until the active link goes down. If links are active on both media, the SFP-module port has priority, but you can use the media-type interface configuration command to manually designate the port as an RJ-45 port or an SFP port.
You can configure the speed and duplex settings consistent with the selected media type. For information on configuring interfaces, see the switch software configuration guide.
The switch Ethernet SFP modules provide connections to other devices. These field-replaceable transceiver modules provide the uplink interfaces.The modules have LC connectors for fiber-optic connections or RJ-45 connectors for copper connections. You can use any combination of the supported SFP modules listed in Table 1-2.
For information about SFP modules, see your SFP module documentation and the Installing and Removing SFP Modules. For cable specifications, see SFP Module Cables, page B-4
The switch uses an SFP-module patch cable, a 0.5-meter, copper, passive cable with SFP module connectors at each end (see Figure 1-3). The patch cable connects two switches in a cascaded configuration.
Figure 1-3 SFP-Module Patch Cable
See the Inserting and Removing the SFP Module Patch Cable for information about using the SFP module patch cable.
You can order this cable (part number CAB-SFP-50CM=).
The power-input terminal provides screw terminals for the AC and DC power connections. The switch can operate with one or two power supplies. If one of the power sources fail, the other continues to power the switch. See Power Supply Installation for information.
Figure 1-4 Power-Input Terminal
The switch has four alarm inputs and one alarm output. The alarm setting is open or closed.
•Open means that the normal condition has current flowing through the contact (referred to as a normally closed contact). The alarm is generated when the current stops.
•Closed means that no current flows through the contact (referred to as a normally open contact). The alarm is generated when the current flows.
The alarm input is a dry-contact alarm port. You can connect up to four alarm inputs from devices, such as a door, a temperature gauge, or a fire alarm, to the alarm port. You can use the CLI to set the alarm severity to minor, major, or critical. An alarm generates a system message and turns on an LED. See Alarm LEDs for the LED descriptions.
The alarm output can be configured as a minor or major alarm. Output alarms often control an external alarm, such as a bell or a light. To connect an external alarm device to the relay, connect two relay contact wires to complete the electrical circuit. See Alarm Port, page B-3 for information on the alarm pinouts.
You can connect the switch to a PC running Microsoft Windows or to a terminal server through either the RJ-45 console port or the USB console port.
•RJ-45 console port. The RJ-45 connection uses an RJ-45-to-DB-9 female cable
•USB mini-Type B console port (5-pin connector); the USB connection uses a USB Type A-to-5-pin mini-Type B cable
The USB console interface speeds are the same as the RJ-45 console interface speeds.
To use the USB console port, you must install the Cisco Windows USB device driver on the device that is connected to the USB console port (device running with Microsoft Windows).
Note For information about downloading the Cisco USB device driver, see the Installing the Cisco Microsoft Windows USB Device Drivers.
With the Cisco Windows USB device driver, connecting and disconnecting the USB cable from the console port does not affect Windows HyperTerminal operations. Mac OS X or Linux require no special drivers.
Note The 5-pin mini-Type B connectors resemble the 4-pin mini-Type B connectors. They are not compatible. Use only the 5-pin mini-Type B. See Figure 1-5.
Figure 1-5 USB Mini-Type B Port
The configurable inactivity timeout reactivates the RJ-45 console port if the USB console port is activated, but no input activity occurs on it for a specified time period. When the USB console port deactivates due to a timeout, you can restore its operation by disconnecting and reconnecting the USB cable. For information on using the CLI to configure the USB console interface, see the switch software guide.
You can use the switch system and port LEDs to monitor switch activity and performance.
Figure 1-6 Switch LEDs (Cable Side)
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SYS (system) |
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OUT (alarm output) |
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CON (console) |
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PSU1 (power supply 1) |
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USB |
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PSU2 (power supply 2) |
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SD (SD flash memory card) |
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PoE1 |
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IN1 (alarm input 1) |
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Express Setup button |
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IN2 (alarm input 2) |
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Ethernet ports |
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IN3 (alarm input 3) |
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SFP module port |
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IN4 (alarm input 4) |
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10/100/1000 port |
1 Only on the Cisco CGS-2520-16S-8PC switch. |
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Off |
System is not powered on |
Blinking green |
POST1 is in progress |
Green |
System is operating normally |
Amber |
System is receiving power but is not functioning properly |
1 POST = power-on self-test. |
The switch power supply module LEDs are labeled PSU1 and PSU2 (on the switch) and PSU OK (on the power supply module). They show whether power supply modules 1 and 2 are receiving power. See Figure 1-6 and Figure 1-9.
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Off |
No alarm |
Amber |
Minor alarm |
Red |
Major alarm |
Blinking red |
Critical alarm |
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Green |
No alarm |
Red |
Relay closed, alarm present |
The console LEDs show which console port is in use. See Figure 1-6 and Figure 1-9 for the LED locations.
If you connect a cable to a console port, the switch automatically uses that port for console communication. If you connect two console cables, the USB console port has priority.
RJ-45 ports and SFP-module slots have port LEDs. Port LEDs, as a group or individually, provide information about the switch and about the individual ports.
The dual-purpose port LEDs identify the connection as either a copper-based connector or an SFP module. The ports can autonegotiate, or you can manually configure each dual-purpose port as either 10/100/1000 with copper connectors or as an SFP-module port, but not as both types at the same time. See Table 1-8 for LED descriptions.
The switch ships with the Secure Digital (SD) flash memory card installed. See Figure 1-1 and Figure 1-2. You can remove the card from a failed switch and install it in a replacement switch. You do not have to reconfigure the new switch. See the Replacing the SD Flash Memory Card for information.
The power supply side has the LED panel and two power supply slots for the removable power supplies. See Figure 1-7 and Figure 1-8.
Figure 1-7 Switch with One Power Supply Module
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LED panel |
Power supply slot 1 |
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Power supply slot 2 |
Figure 1-8 Switch with Both Power Supply Modules
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PSU OK LED |
For a description of the PSU OK LED, see Table 1-4.
Figure 1-9 Switch LEDs
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SYS (system) |
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OUT (alarm output) |
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CON (console) |
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PSU1 (power supply 1) |
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USB LED |
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PSU2 (power supply 2) |
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SD (SD flash memory card) |
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PoE1 |
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IN1 (alarm input 1) |
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Express setup button |
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IN2 (alarm input 2) |
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Ethernet port |
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IN3 (alarm input 3) |
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10/100/1000 port |
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IN4 (alarm input 4) |
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SFP port |
1 Only on the Cisco CGS-2520-16S-8PC switch. |
The switch has two slots for power supply modules:
•PWR-RGD-LOW-DC: low-voltage DC (for voltage information, see Table A-6)
•PWR-RGD-AC-DC: high-voltage AC or DC (for voltage information, see Table A-5)
•PWR-RGD-AC-DC-C: high-voltage AC or DC for China
The switch supports these power supply module combinations:
•Single low-voltage DC
•Single high-voltage AC or DC
•Two high-voltage AC or DC
•Two low-voltage DC
•One high-voltage AC or DC and one low-voltage DC
For information on installing the power supply modules, see Power Supply Installation
See Table 1-4 for information on the power supply LEDs.
•Device manager
You can use the device manager in the switch memory to manage standalone switches. For information, see the switch getting started guide and the device manager online help.
•Cisco IOS CLI
You can configure and monitor the switch from the CLI. Connect your management station to the switch console port or use Telnet from a remote management station. See the switch command reference on Cisco.com for information.
•CiscoWorks application
The CiscoWorks LAN Management Solution (LMS) is a suite of management tools that simplify the configuration, administration, monitoring, and troubleshooting of Cisco networks. See the LMS documentation for information: http://www.cisco.com/en/US/products/ps7198/tsd_products_support_series_home.html
•CiscoView application
The CiscoView device-management application displays a switch image that you can use to view switch status and performance information and to set configuration parameters. The CiscoView application (sold separately) can be a standalone application or part of a Simple Network Management Protocol (SNMP) platform. For information, see the CiscoView documentation: http://www.cisco.com/en/US/products/sw/cscowork/ps4565/tsd_products_support_series_home.html
•Cisco Configuration Engine
The Cisco Configuration Engine automates initial configurations and configuration updates. It generates device-specific configuration changes, sends them to the device, executes the configuration changes, and logs the results. For information about Cisco Configuration Engine, see the software configuration guide on Cisco.com.
•SNMP network management
You can manage switches from a Simple Network Management Protocol (SNMP)-compatible management station that is running platforms such as HP OpenView or SunNet Manager. The switch supports a comprehensive set of Management Information Base (MIB) extensions and four Remote Monitoring (RMON) groups. See the switch software configuration guide on Cisco.com and the documentation that came with your SNMP application for information.
•Cisco Configuration Professional
Configuration Professional is a software program that you download from Cisco.com and run on your PC. It offers advanced options for configuring and monitoring multiple devices, including the Cisco CGS 2520 switches. Configuration Professional is available at no cost:
http://www.cisco.com/en/US/products/ps9422/index.html
See the Configuration Professional getting started guide and online help for more information.
•Cisco Security Manager
Cisco Security Manager (Security Manager) manages security policies on Cisco security devices. It supports integrated provisioning of firewall, IPS, and VPN (site-to-site, remote access, and SSL) services across devices. For information, see the User Guide for Cisco Security Manager 3.2.2.
•Catalyst Smart Operations
The Smart Install feature provides a single point of management (director) in a network. You can use it to provide a zero touch image and configuration upgrade of newly deployed switches and image and configuration downloads for any client switches. For information, see the Cisco Smart Install Configuration Guide on Cisco.com.
The Smartports feature provides user-defined and Cisco-default macros for creating custom switch configurations to simplify deployment. For information about configuring Smartports, see the switch software configuration guide on Cisco.com.
See the switch software configuration guide on Cisco.com for an explanation of network configuration concepts. The software configuration guide also provides network configuration examples for creating dedicated network segments that are interconnected through Ethernet connections.