Product Overview

The Catalyst 3560 switch—also referred to as the switch—is an Ethernet switch to which you can connect devices like Cisco Wireless Access Point workstations, Cisco IP Phones, and other network devices such as servers, routers, and other switches. This chapter provides a functional overview of the Catalyst 3560 switch. These topics are included:

Setting up the Switch

See the Catalyst 3560 Switch Getting Started Guide that shipped with the switch for instructions on how to use Express Setup to initially configure your Catalyst switch. The Getting Started Guide also covers switch management options, basic rack-mounting procedures, port and module connections, power connection procedures, and troubleshooting help.

Features

The Catalyst 3560 switch can be deployed as a backbone switch, aggregating 10BASE-T and 100BASE-TX Ethernet traffic from other network devices. See the switch software configuration guide for examples showing how you might deploy the switch in your network.

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Catalyst 3560-24PS switch—24 10/100 Power over Ethernet (PoE) ports and 2 small form-factor pluggable (SFP) module slots

Note

When installed in Catalyst 3560 switches, 1000BASE-T SFP modules can operate at 10, 100, or 1000 Mbps in full-duplex mode or at 10 or 100 Mbps in half-duplex mode.

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These switches support the SFP module patch cable. (Order the SFP module patch cable separately, part number CAB-SFP-50CM=.)

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For 10/100 and 10/100/1000 ports, the speed and duplex settings are autonegotiated.

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For 1000BASE-T SFP module ports, the speed and duplex settings are autonegotiated.

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Connection for optional Cisco RPS 675 that operates on AC input and supplies backup DC power output to the switches.

Front Panel Description

FastEthernet Switch Front Panel Descriptions

The 10/100 PoE ports on the Catalyst 3560-24PS switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left, as shown in Figure 1-1. Port 3 is above port 4, and so on. The SFP module slots are numbered 1 and 2.

1	10/100 ports	2	SFP module slots

The 10/100 PoE ports on the Catalyst 3560-24TS-S switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left, as shown in Figure 1-2. Port 3 is above port 4, and so on. The SFP module slots are numbered 1 and 2.

1	10/100 ports	2	SFP module slots

The 10/100 PoE ports on the Catalyst 3560-48PS switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left, as shown in Figure 1-3. Port 3 is above port 4, and so on. The SFP module slots are numbered 1 to 4.

1	10/100 ports	2	SFP module slots

The 10/100 ports on the Catalyst 3560-48TS-S switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left, as shown in Figure 1-8. Port 3 is above port 4, and so on. The SFP module slots are numbered 1 to 4.

Gigabit Ethernet Switch Front Panel Descriptions

1	10/100 ports	2	SFP module slots

The 10/100/1000 PoE ports on the Catalyst 3560G-24PS switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left, as shown in Figure 1-5. Port 3 is above port 4, and so on. The SFP module slots are numbered 25 to 28.

1	10/100/1000 ports	2	SFP module slots

The 10/100/1000 ports on the Catalyst 3560-24TS switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left, as shown in Figure 1-6. Port 3 is above port 4, and so on. The SFP module slots are numbered 25 to 28.

1	10/100/1000 ports	2	SFP module slots

The 10/100/1000 PoE ports on the Catalyst 3560G-48PS switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left, as shown in Figure 1-7. Port 3 is above port 4, and so on. The SFP module slots are numbered 49 to 52.

1	10/100/1000 ports	2	SFP module slots

The 10/100/1000 ports on the Catalyst 3560G-48TS switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left, as shown in Figure 1-8. Port 3 is above port 4, and so on. The SFP module slots are numbered 49 to 52.

10/100 and 10/100/1000 Ports

You can set the 10/100 ports on the Catalyst 3560 switches to operate in any combination of half duplex, full duplex, 10 Mbps, or 100 Mbps. You can set the 10/100/1000 ports to operate in 10 or 100 Mbps in half or full duplex or in 1000 Mbps in full duplex.

You can set both the 10/100 and the 10/100/1000 ports for speed and duplex autonegotiation, in compliance with IEEE 802.3ab. (The default setting is autonegotiate.)

1	10/100/1000 ports	2	SFP module slots

Note You can configure duplex mode to half, full, or autonegotiate on Gigabit Ethernet interfaces if the speed is set to 10 or 100 Mbps. You cannot configure half-duplex mode on Gigabit Ethernet interfaces if the interface speed is 1000 Mbps.

When set for autonegotiation, the port senses the speed and duplex settings of the attached device and advertises its own capabilities. If the connected device also supports autonegotiation, the switch port 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).

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

The10/100 ports on the Catalyst 3560-24PS and 3560-48PS switches and the 10/100/1000 ports on the Catalyst 3560G-24PS and 3560G-48PS switches provide PoE support for devices compliant with IEEE 802.3af and also provide Cisco pre-standard PoE support for Cisco IP Phones and Cisco Aironet Access Points.

Each of the Catalyst 3560-24PS switch 10/100 ports or the Catalyst 3560G-24PS switch 10/100/1000 ports can deliver up to 15.4 W of PoE. On the Catalyst 3560-48PS or 3560G-48PS switches, any 24 of the 48 10/100 or 10/100/1000 ports can deliver 15.4 W of PoE, or any combination of the ports can deliver an average of 7.7 W of PoE at the same time, up to a maximum switch power output of 370 W.

On a per-port basis, you can control whether or not a Catalyst 3560 PoE port automatically provides power when an IP phone or an access point is connected. The Cluster Management Suite (CMS), Network Assistant, and the CLI provide two PoE settings for each 10/100 or 10/100/1000 PoE port: Auto and Never.

When you select the Auto setting, the port provides power only if a valid powered device, such as an IEEE 802.3af-compliant powered device, a Cisco pre-standard IP phone, or a Cisco pre-standard Cisco access point, is connected to it. The Auto setting is the default. However, when you select the Never setting, the port does not provide power even if a Cisco IP phone or an access point is connected to it.

Cisco enhanced power negotiation allows some powered devices, such as the Cisco 7970G IP Phone, to operate in high-power mode on Catalyst 3560 PoE switches. The powered device and the switch negotiate through power-negotiation Cisco Discovery Protocol (CDP) messages for an agreed-upon power-consumption level. The negotiation allows a high-power Cisco powered device that consumes more than 7 W to operate at its highest power mode. The powered device first boots up in low-power mode, consumes less than 7 W, and negotiates to obtain enough power to operate in high-power mode. The device changes to high-power mode only when it receives confirmation from the switch. High-power devices can operate in low-power mode on switches that do not support power-negotiation CDP.

For information about configuring and monitoring PoE ports, see the switch software configuration guide.

Note You also can connect a Cisco IP Phone or Cisco Aironet Access Point to a Catalyst 3560 PoE switch 10/100 or 10/100/1000 port and to an AC power source for redundant power. The powered device might switch to the AC power source as its primary power source upon being connected to it. In that case, the PoE port becomes the backup power source for the powered device.

If the primary source fails, the second power source becomes the primary power source to the powered device. During the power transfer, an IP phone might reboot or reestablish link with the switch.

For information about Cisco IP Phones and Cisco Aironet Access Points, see the documentation that came with your IP phone or access point.

Note 100BASE-TX and 1000BASE-T traffic requires Category 5 cable. 10BASE-T traffic can use Category 3 or Category 4 cables.

When connecting the switch to workstations, servers, routers, and Cisco IP Phones, be sure that the cable is a straight-through cable. When connecting the switch to switches or hubs, use a crossover cable. When using a straight-through or crossover cable for 1000BASE-T connections, be sure to use a twisted four-pair, Category 5 cable for proper operation. Pinouts for the cables are described in Appendix B, "Connector and Cable Specifications."

Note You can use the mdix auto interface configuration command in the CLI to enable the automatic medium-dependent interface crossover (Auto-MDIX) feature. When the Auto-MDIX feature is enabled, the switch detects the required cable type for copper Ethernet connections and configures the interfaces accordingly. Therefore, you can use either a crossover or a straight-through cable for connections to a copper 10/100, 10/100/1000, or 1000BASE-T SFP module port on the switch, regardless of the type of device on the other end of the connection.

The Auto-MDIX feature is enabled by default on switches running Cisco IOS Release 12.2(18)SE or later. For releases between Cisco IOS Release 12.1(14)EA1 and 12.2(18)SE, the Auto-MDIX feature is disabled by default. For configuration information for this feature, see the switch software configuration guide or the switch command reference.

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.

SFP Module Slots

The SFP module slots support the SFP modules that are listed in the Catalyst 3560 release notes.

SFP Modules

The Catalyst 3560 switch uses Gigabit Ethernet SFP modules to establish fiber-optic and 1000BASE-T connections. These transceiver modules are field-replaceable, providing the uplink interfaces when inserted in an SFP module slot. You can use the SFP modules for Gigabit uplink connections to other switches. You use fiber-optic cables with LC or MT-RJ connectors to connect to a fiber-optic SFP module. You use Category 5 cable with RJ-45 connectors to connect to a copper SFP module.

For more information about these SFP modules, see your SFP module documentation.

SFP Module Patch Cable

The Catalyst 3560 switch supports the SFP module patch cable, a 1/2 meter, copper, passive cable with SFP module connectors at each end (see Figure 1-9). The patch cable can connect two Catalyst 3560 switches in a cascaded configuration.

LEDs

You can use the switch LEDs to monitor switch activity and its performance. Figure 1-10 shows the switch LEDs and the Mode button that you use to select one of the port modes.

All of the LEDs described in this section are visible in the CMS and Network Assistant GUIs. The switch online help describes how to use CMS or Network Assistant to configure and monitor individual switches and switch clusters.

1	Mode button	5	Status LED
2	PoE LED	6	RPS LED
3	Speed LED	7	System LED
4	Duplex LED	8	Port LEDs

Note The PoE LED is only visible on Catalyst 3560 switches that support PoE.

System LED

The System LED shows whether the system is receiving power and is functioning properly. Table 1-1 lists the LED colors and their meanings.

RPS LED

Table 1-1 System LED
Color	System Status
Off	System is not powered on.
Green	System is operating normally.
Amber	System is receiving power but is not functioning properly.

The RPS LED shows the RPS status. Table 1-2 lists the LED colors and their meanings.

Table 1-2 RPS LED
Color	RPS Status
Off	RPS is off or not properly connected.
Green	RPS is connected and ready to provide back-up power, if required.
Blinking green	RPS is connected but is unavailable because it is providing power to another device (redundancy has been allocated to a neighboring device).
Amber	The RPS is in standby mode or in a fault condition. Press the Standby/Active button on the RPS, and the LED should turn green. If it does not, the RPS fan could have failed. Contact Cisco Systems.
Blinking amber	The internal power supply in a switch has failed, and the RPS is providing power to the switch (redundancy has been allocated to this device).

For more information about the Cisco RPS 675, see the Cisco RPS 675 Redundant Power System Hardware Installation Guide.

Port LEDs and Modes

Each RJ-45 port and SFP module slot has a port LED. These port LEDs, as a group or individually, display information about the switch and about the individual ports. The port modes determine the type of information displayed through the port LEDs. Table 1-3 lists the mode LEDs and their associated port mode and meaning.

To select or change a mode, press the Mode button until the desired mode is highlighted. When you change port modes, the meanings of the port LED colors also change. Table 1-5 explains how to interpret the port LED colors in different port modes.

Table 1-3 Modes for Port LEDs
Selected Mode LED	Port Mode	Description
STAT	Port status	The port status. This is the default mode.
DUPLX	Port duplex mode	The port duplex mode: full duplex or half duplex.
SPEED	Port speed	The port operating speed: 10, 100, or 1000¹ Mbps.
PoE	PoE port power	The PoE status.

¹When installed in Catalyst 3560 switches, 1000BASE-T SFP modules can operate at 10, 100, or 1000 Mbps in full-duplex mode or at 10 or 100 Mbps in half-duplex mode.

Even if PoE mode is not selected, the PoE LED still shows PoE problems when they are detected.

Table 1-4 lists the PoE mode LED colors and their meanings. The PoE LED applies only to Catalyst 3560 switches that support PoE.

Table 1-4 PoE Mode LED
Color	PoE Status
Off	PoE mode is not selected. None of the 10/100 or 10/100/1000 PoE ports have been denied power or are in a fault condition.
Green	PoE mode is selected, and the PoE status is shown on the port LEDs.
Blinking amber	PoE mode is not selected. At least one of the 10/100 or 10/100/1000 PoE ports has been denied power, or at least one of the ports has a PoE fault.

Table 1-5 Meaning of Port LED Colors in Different Modes on the Switch
Port Mode	LED Color	Meaning
PoE	Off	PoE is off. If the powered device is receiving power from an AC power source, the PoE port LED is off even if the powered device is connected to the switch port.
	Green	PoE is on. The port LED is green only when the switch port is providing power.
	Alternating green and amber	PoE is denied because providing power to the powered device will exceed the 370 W switch power capacity.
	Blinking amber	PoE is off due to a fault. Caution PoE faults are caused when noncompliant cabling or powered devices are connected to a PoE port. Only standard-compliant cabling can be used to connect Cisco pre-standard IP Phones or wireless access points or IEEE 802.3af-compliant devices to PoE ports. A cable or device that causes a PoE fault must be removed from the network.
	Amber	PoE for the port has been disabled. Note PoE is enabled by default.
STAT (port status)	Off	No link, or port was administratively shut down.
	Green	Link present.
	Blinking green	Activity. Port is transmitting or receiving data.
	Alternating green-amber	Link fault. Error frames can affect connectivity, and errors such as excessive collisions, CRC errors, and alignment and jabber errors are monitored for a link-fault indication.
	Amber	Port is blocked by Spanning Tree Protocol (STP) and is not forwarding data. Note After a port is reconfigured, the port LED can remain amber for up to 30 seconds as STP checks the network topology for possible loops.
	Blinking amber	Port is blocked by STP and is not transmitting or receiving packets.
DUPLX (duplex)	Off	Port is operating in half duplex.
DUPLX (duplex)	Green	Port is operating in full duplex.
SPEED	10/100 and 10/100/1000 ports
	Off	Port is operating at 10 Mbps.
	Green	Port is operating at 100 Mbps.
	Flashing green	Port is operating at 1000 Mbps.
	SFP ports
	Off	Port is operating at 10 Mbps.
	Green	Port is operating at 100 Mbps.
	Blinking green	Port is operating at 1000 Mbps. Note When installed in Catalyst 3560 switches, 1000BASE-T SFP modules can operate at 10, 100, or 1000 Mbps in full-duplex mode or at 10 or 100 Mbps in half-duplex mode.

Rear Panel Description

The Catalyst 3560 switch rear panel has an AC power connector, an RPS connector, and an RJ-45 console port. (See Figure 1-11 and Figure 1-12 for examples of the Catalyst 3560 rear panels.)

Figure 1-12 Catalyst 3560G-24PS, 3560G-48PS, 3560G-24TS, and 3560G-48TS Switch Rear Panel

Power Connectors

The switch is powered through the internal power supply. You can also connect the Cisco RPS 675 to provide backup power if the switch internal power supply should fail.

1	RJ-45 console port	3	RPS connector
2	AC power connector	4	Fan exhaust

1	RJ-45 console port	3	RPS connector
2	Fan exhaust	4	AC power connector

Note The Catalyst 3560 switch and the Cisco RPS 675 should be connected to the same AC power source.

Internal Power Supply Connector

The internal power supply is an autoranging unit that supports input voltages between 100 and 240 VAC. Use the supplied AC power cord to connect the AC power connector to an AC power outlet.

Cisco RPS Connector

The switch is powered through the internal power supply. You can also connect the Cisco RPS 675 redundant power supply (model PWR675-AC-RPS-N1=) to provide backup power if the switch internal power supply should fail.

Note The Catalyst 3560 switch and the Cisco RPS 675 should be connected to the same AC power source.

Cisco RPS 675

The Cisco RPS 675 as two output levels: -48 V and 12 V, with a total maximum output power of 675 W. Use the supplied RPS connector cable to connect the RPS to the switch.

Warning Attach only the Cisco RPS (model PWR675-AC-RPS-N1) to the RPS receptacle. Statement 100C

The RPS is a redundant power system that can support six external network devices and provides power to one failed device at a time. It automatically senses when the internal power supply of a connected device fails and provides power to the failed device, preventing loss of network traffic. For more information on the Cisco RPS 675, see the Cisco RPS 675 Redundant Power System Hardware Installation Guide.

Console Port

You can connect the switch to a PC by means of the console port and the supplied RJ-45-to-DB-9 female cable. If you want to connect the switch console port to a terminal, you need to provide an RJ-45-to-DB-25 female DTE adapter. You can order a kit (part number ACS-DSBUASYN=) containing that adapter from Cisco. For console port and adapter pinout information, see the "Connector and Cable Specifications" section on page B-1.

Management Options

CMS is a GUI that can be launched from anywhere in your network through a web browser. CMS is already bundled in the switch. The CMS plug-in is required to run CMS through your web browser. The plug-in is supported both in Windows environments and on Solaris platforms.

From CMS, you can fully configure and monitor a switch or switch clusters, display network topologies to gather link information, and display switch images to modify switch- and port-level settings. For more information, see the "Getting Started with CMS" chapter of the switch software configuration guide on Cisco.com and the online help for this application.

Cisco Network Assistant is a free software program that you download from Cisco.com and run on your PC. It offers advanced options for configuring and monitoring multiple devices, including switches, switch clusters, switch stacks, routers, and access points. Network Assistant is free—there is no charge to download, install, or use it.

You must be a registered Cisco.com user, but you need no other access privileges.

Download the Network Assistant installer, and run it. (You can run it directly from the web if your browser offers this choice.)

When you run the installer, follow the displayed instructions. In the final panel, click Finish to complete the Network Assistant installation.

See the Network Assistant online help and the getting started guide for more information.

The switch CLI is based on Cisco IOS software and is enhanced to support desktop-switching features. You can fully configure and monitor the switch and switch cluster members from the CLI. You can access the CLI either by connecting your management station directly to the switch console port or by using Telnet from a remote management station. See the Catalyst 3560 Switch Command Reference on Cisco.com for more information.

The CiscoView device-management application displays the switch image that you can use to set configuration parameters and to view switch status and performance information. The CiscoView application, which you purchase separately, can be a standalone application or part of a Simple Network Management Protocol (SNMP) platform. See the CiscoView documentation for more information.

You can manage switches from a 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 more information.

Network Configurations

See the switch software configuration guide on Cisco.com for an explanation of network configuration concepts. The software configuration guide also provides examples of network configurations that use the switch to create dedicated network segments that are interconnected through Ethernet connections.

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