Cisco CBS Series Specification sheet

Get To Know Your Switch
This chapter contains the following sections:
•Introduction, on page 1
•Rack Mounting Switch, on page 2
•Wall Mounting a Switch, on page 3
•Power over Ethernet Considerations, on page 5
•Front Panel, on page 7
•Configuring Switches, on page 9
•Restoring Factory Default Settings, on page 12
•Navigation, on page 12
Introduction
Thank you for purchasing the Cisco CBS Series Switch. The Cisco CBS Series Switches combine powerful
network performance and reliability with a complete suite of network features that you need for a solid business
network. These expandable Gigabit Ethernet switches, with Gigabit or 10-Gigabit uplinks, provide multiple
management options, rich security capabilities, and Layer-3 static routing features far beyond those of an
unmanaged or consumer-grade switch, at a lower cost than fully managed switches.
Before You Begin
Before you begin installing your device, ensure that the following items are available:
• RJ-45 Ethernet cables for connecting network devices. A category 6a and higher cable is required for
10G ports; a category 5e and higher cable is required for all other ports.
• Tools for installing the hardware.
• The rack-mount kit packed with the switch contains four rubber feet for desktop placement, and
two brackets and twelve screws for rack mounting.
• If the supplied screws are lost, use replacement screws in the following size:
• Diameter of the screw head: 6.9 mm
• Length of the face of the screw head to the base of screw: 5.9 mm
• Shaft diameter: 3.94 mm
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To prevent airflow restriction, allow clearance around the ventilation
openings to be at least 3 inches (7.6 cm).
Warning
•A computer to manage the device either via the console port or via the web-based interface. for web-based
interface the computer needs to support one of the following browsers:
• Microsoft Edge
• Firefox (version 82 or 81 or higher)
• Chrome (version 86 or 85 or higher)
• Safari over MAC (version 14.0 and higher)
Suitable for installation in information Technology Rooms in accordance with Article 645 of the national
Electric Code and NFPA 75.
Warning
Rack Mounting Switch
You can mount the switches on any standard size, 19-inch (about 48 cm) wide rack. The switch requires 1
rack unit (RU) of space, which is 1.75 inches (44.45 mm) high.
For stability, load the rack from the bottom to the top, with the heaviest devices on the bottom. A
top-heavy rack is likely to be unstable and might tip over.
Caution
To install the switch into a 19-inch standard chassis:
Step 1 Place one of the supplied brackets on the side of the switch so that the four holes of the brackets align to the screw holes,
and then use the four supplied screws to secure it.
Step 2 Repeat the previous step to attach the other bracket to the opposite side of the switch.
Step 3 After the brackets are securely attached, the switch is now ready to be installed into a standard 19-inch rack.
Use supplied brackets to rack mount the switch.
Note
Supplied rack mounting for switch models with front mounting position. The mounting ears do not sit flush
to the front panel.
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Rack Mounting Switch

Due to design differences, some of the mounting brackets will attach such that the switch will protrude about
an inch from the mounting surface.
Supplied rack mounting for switch models with front mounting position. The mounting ears sit flush to the
front panel.
Wall Mounting a Switch
You can mount the switches on a wall, using wall studs or to a firmly attached plywood mounting backboard.
Read these 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.
Caution
Do not wall-mount the switch with its front panel facing up. Following safety regulations, wall mount
the switch with its front panel facing down or to the side to prevent airflow restriction and to provide
easier access to the cables.
Caution
To wall-mount a 24-port switch using brackets:
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Wall Mounting a Switch

Step 1 Attach a 19-inch bracket to one side of the switch.
Step 2 Repeat the previous step to attach the other bracket to the opposite side of the switch.
Step 3 After the brackets are securely attached, mount the switch with the front panel facing down. Make sure that the switch
is attached securely to wall studs or to a firmly attached plywood-mounting backboard. Wall-mounting a 24-port switch.
Wall-mounting a 24-port
Wall Mount an 8 Port Switch
To wall-mount a 8-port switch using mounting screws, follow these steps:
Step 1 Locate the screw template. The template is used to align the mounting screw holes.
Step 2 Position the screw template so that the edge that is marked as CABLE SIDE ENTRY faces toward the floor. Make sure
that the switch is attached securely to wall studs or to a firmly attached plywood mounting backboard.
Step 3 Peel the adhesive strip off the bottom of the screw template.
Step 4 Attach the screw template to the wall.
Step 5 Use a 0.144-inch (3.7 mm) or a #27 drill bit to drill a 1/2-inch (12.7 mm) hole in the two screw template slots.
Step 6 Insert two screws in the slots on the screw template and tighten them until they touch the top of the screw template.
Installing the mounting screws on the wall
Figure 3 Installing the mounting screws on the wall
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Wall Mount an 8 Port Switch

Step 7 Remove the screw template from the wall.
Step 8 Place the switch onto the mounting screws, and slide it down until it locks in place. Wall-mounting an 8-port switch
Figure 4 Wall-mounting an 8-port switch
Power over Ethernet Considerations
Some switches support PoE while others do not. The switch models that support PoE have a P in their model
number, such as: CBSxxx-xxP-xx. If your switch is one of the Power over Ethernet (PoE) models, consider
the following power requirement.
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Power over Ethernet Considerations

The switch is to be connected only to PoE networks without routing to the outside plant.
Warning
Table 1: Switches with Power Over Ethernet
PoE PSE SupportPoE PD Chipset TypeDescriptionSKU Name
AF/AT1*69208M8-Port Gigabit PoE Smart
Switch
CBS250-8PP-D
AF/ATTPS23888-Port Gigabit PoE Smart
Switch
CBS250-8PP-E-2G
AF/ATTPS23888-Port Gigabit PoE Smart
Switch
CBS250-8P-E-2G
AF/ATTPS23888-Port Gigabit PoE Smart
Switch
CBS250-8FP-E-2G
AF/AT2*TPS238816-Port Gigabit PoE
Smart Switch
CBS250-16P-2G
AF/AT3*TPS238824-Port Gigabit PoE
Smart Switch
CBS250-24PP-4G
AF/AT3*TPS238824-Port Gigabit PoE
Smart Switch
CBS250-24P-4G
AF/AT3*TPS238824-Port Gigabit PoE
Smart Switch
CBS250-24FP-4G
AF/AT6*TPS238848-Port Gigabit PoE
Smart Switch
CBS250-48PP-4G
AF/AT6*TPS238848-Port Gigabit PoE
Smart Switch
CBS250-48P-4G
AF/AT3*TPS238824-Port Gigabit PoE
Smart Switch with 10G
Uplinks
CBS250-24P-4X
AF/AT3*TPS238824-Port Gigabit PoE
Smart Switch with 10G
Uplinks
CBS250-24FP-4X
AF/AT6*TPS238848-Port Gigabit PoE
Smart Switch with 10G
Uplinks
CBS250-48P-4X
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Power over Ethernet Considerations

Consider the following when connecting a PoE switch. The PoE switches are PSE (Power Sourcing
Equipment) that are capable of supplying DC power to attaching powered devices (PD). These devices
include VoIP phones, IP cameras, and wireless access points. The PoE switches can detect and supply
power to pre-standard legacy PoE PD. Due to the PoE legacy support, it is possible that a PoE switch
acting as a PSE may mistakenly detect and supply power to an attaching PSE, including other PoE
switches, as a legacy PD. Even though PoE switches are PSE, and as such should be powered by AC,
they could be powered up as a legacy PD by another PSE due to false detection. When this happens, the
PoE switch may not operate properly and may not be able to properly supply power to its attaching PDs.
To prevent false detection, you should disable PoE on the ports on the PoE switches that are used to
connect to PSEs. You should also first power up a PSE device before connecting it to a PoE switch.
When a device is being falsely detected as a PD, you should disconnect the device from the PoE port
and power recycle the device with AC power before reconnecting its PoE ports.
Caution
Front Panel
The ports, LEDs, and Reset button are located on the front panel of the switch, as well as the following
components:
Cisco Business 250 Series Model
Models may differ within the CBS 250 series and this is just a representation of a model within the
series.
Note
• Console port with RJ-45 and mini USB connectors. The console connects a serial cable to a computer
serial port so that it can be configured using a terminal emulation program.
Only certain models support this feature.
Note
• USB Port—The USB port connects the switch to a USB device so that you can save and restore the
configuration files, firmware images, and SYSLOG files through the connected USB device. The USB
port supports the FAT32 file system.
• RJ-45 Ethernet Ports—The RJ-45 Ethernet ports connect network devices, such as computers, printers,
and access points, to the switch.
• SFP+ Port (if present)—The small form-factor pluggable plus (SFP+) are connection points for modules
so that the switch can link to other switches. These ports are also commonly referred to as mini 10GigaBit
Interface Converter ports. The term SFP+ is used in this guide.
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Front Panel

• The SFP+ ports (if present) are compatible with the following Cisco SFP 1G optical modules
MGBSX1, MGBLX1, MGBLH1, MGBT1, as well as other brands.
• The SFP+ ports are compatible with the following Cisco SFP 1G optical modules MGBSX1,
MGBLX1, MGBLH1, MGBT1, as well as other brands.
• The Cisco SFP+ Copper Cable modules that are supported in the Cisco switches are:
SFP-H10GB-CU1M, SFP-H10GB-CU3M, and SFP-H10GB-CU5M.
• The LEDs of the corresponding RJ-45 port flash green to respond to the SFP interface traffic.
• Small form-factor pluggable (SFP) ports are connection points for modules, so the switch can link to
other switches.
• Some SFP interfaces are shared with one other RJ-45 and SFP+ port, called a combo port. When the SFP
is active, the adjacent RJ-45 port is disabled.
• Reset button is used to reset or reboot the switch. The table below displays the reset behavior on the
switch.
Old Behavior (Firmware prior to
3.2)
New Behavior (Firmware 3.2 and
on)
Press Type
ReloadSystem LED is green, releasing
button does not cause reload.
1- 5 seconds
ReloadSystem LED flash green,
releasing button during this period
will cause device reload, but
system is not set to factory
default.
6- 10 seconds
Factory defaultSystem LED is green, releasing
button does not cause reload
11-15 seconds
Factory defaultSystem LED flashes green,
releasing button during this period
will cause device reload to factory
default
16-20 seconds
Factory defaultSystem LED is green, releasing
button does not cause reload
> 20 seconds
Stack Behavior
The reset button disable setting is applied to all units in the stack, meaning
that if configured, the reset button on all units in the stack are disabled, and
if not configured the reset button on all units in the stack are enabled. This
applies also to units that join an existing stack.
Note
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Front Panel

• OOB Port (if present)—The Out of Band (OOB) port is a CPU Ethernet port that can be used only as a
management interface. Bridging between the OOB port and the in-band Layer 2 interface is not supported.
This does not appear on 250 devices.
•Multi-Gigabit Ethernet Ports (if present) —Highlighted in blue, these ports support speeds up to 2.5 Gbps
or 5 Gbps on Cat5e cables. The maximum speed supported is printed on the blue shade under the port.
Uplink ports on CBS350-8MGP-2X also support multi-Gigabit speed. In this case, port speed can reach
10Gbps. Most of the cabling deployed worldwide is Cat5e, and previously limited to 1 Gbps at 100
meters. Cisco multi-Gigabit Ethernet enables speeds up to 2.5 or 5 Gbps on the same infrastructure
without replacing a cable.
• 60-Watt PoE Ports (if present)- The 60-Watt PoE port doubles the maximum PoE power delivered on
the port to 60W.
Front Panel LEDs
The following are the global LEDs found on the devices:
• System—(Green) The LED lights steady when the switch is powered on, and flashes when booting,
performing self-tests, or acquiring an IP address. If the LED flashes Amber, the switch has detected a
hardware or firmware failure, and/or a configuration file error.
The following are per port LEDs:
• LINK/ACT—(Green) Located on the left of each port. The LED lights steady when a link between the
corresponding port and another device is detected, and flashes when the port is passing traffic.
• SFP+ (if present)—(Green) Located on the right of a 10G port. The LED lights steady when a connection
is made through the shared port, and flashes when the port is passing traffic.
• Gigabit—(Green) Located on the right of the 1G port. The LED lights steady when another device is
connected to the port, is powered on, and a 1000 Mbps link is established between the devices. When
the LED is off, the connection speed is under 1000 Mbps or nothing is cabled to the port. (This feature
is only available on certain models).
• PoE (if present)—(Amber) Located on the right of the port. The LED lights steady when power is being
supplied to a device attached to the corresponding port. (This feature is only available on certain models).
Configuring Switches
The switch can be accessed and managed over your IP network using the web-based interface, or by using
the switch’s command-line interface through the console port. Using the console port requires advanced user
skills and is only supported on certain models.
The following table shows the default settings used when configuring your switch for the first time.
Default ValueParameter
ciscoUsername
ciscoPassword
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Front Panel LEDs

192.168.1.254LAN IP
Configuring Your Switch Using the Web-based Interface
To access the switch with a web-based interface, you must know the IP address that the switch is using. The
switch uses the factory default IP address of 192.168.1.254, with a subnet of /24. When the switch is using
the factory default IP address, the System LED flashes continuously. When the switch is using a DHCP
server-assigned IP address or an administrator has configured a static IP address, the System LED is a steady
green (DHCP is enabled by default).
If you are managing the switch through a network connection and the switch IP address is changed, either by
a DHCP server or manually, your access to the switch will be lost. You must enter the new IP address that
the switch is using into your browser to use the web-based interface. If you are managing the switch through
a console port connection, the link is retained.
To configure the switch using the web-based interface:
Step 1 Power on the computer and your switch.
Step 2 Connect the computer to any network port.
Step 3 Set up the IP configuration on your computer.
a) If the switch is using the default static IP address of 192.168.1.254/24, you must choose an IP address for the computer
in the range of 192.168.1.2 to 192.168.1.253 that is not already in use.
b) If the IP addresses will be assigned by DHCP, make sure that your DHCP server is running and can be reached from
the switch and the computer. You may need to disconnect and reconnect the devices for them to discover their new
IP addresses from the DHCP server.
Details on how to change the IP address on your computer depend upon the type of architecture and operating
system that you are using. Use your computers local Help and Support functionality and search for “IP
Addressing.”
Note
Step 4 Open a web browser window.
Step 5 Enter the switch IP address in the address bar and press Enter. For example, http://192.168.1.254.
Step 6 When the login page appears, choose the language that you prefer to use in the web-based interface and enter the username
and password.
The default username is cisco. The default password is cisco. Usernames and passwords are both case sensitive.
Step 7 Click Log In.
Step 8 If this is the first time that you have logged on with the default username and password, the Change username and
Password. Enter a new username and password and confirm.
If this is the first time that you have logged on with the default username and password, the Change username and Password
page opens
Please refer to the password complexity rule section in Login Settings before creating a password.
Note
Step 9 Click Apply.
Make sure that any configuration changes made are saved before exiting from the web-based interface by
clicking on the Save icon. Exiting before you save your configuration results in all changes being lost.
Caution
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Configuring Your Switch Using the Web-based Interface