Cisco CBS 250 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
•Navigation, on page 11
Introduction
Thank you for purchasing the Cisco CBS 250 Series Switch. The Cisco CBS 250 Series Switches are the next
generation of affordable smart switches that 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. With an easy-to-use web user interface, Smart Network
Application, and Power over Ethernet Plus capability, you can deploy and configure a complete business
network in minutes.
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 rackmounting.
• If the supplied screws are lost, use replacement screws in the following size:
• Diameter of the screw head: 6.9 mm
• Length of face of screw head to base of screw: 5.9 mm
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• Shaft diameter: 3.94 mm
• 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)
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.
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Rack Mounting Switch

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, wallmount 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:
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
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Wall Mounting a Switch

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 plywoodmounting 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
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
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Wall Mount 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.
The switch is to be connected only to PoE networks without routing to the outside plant.
Danger
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
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Power over Ethernet Considerations

PoE PSE SupportPoE PD Chipset TypeDescriptionSKU Name
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
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
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Power over Ethernet Considerations

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 featue.
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.
• 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.
• The SFP+ ports 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.
• Small form-factor pluggable (SFP) ports are connection points for modules, so the switch can link
to other switches.
• The LEDs of the corresponding RJ-45 port flash green to respond to the SFP interface traffic.
• 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. To reboot the switch, press the Reset button for less
than 10 seconds.
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Front Panel

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 LEDs describe the stacking behavior of the switch.
• Stack ID LED (Green) - The LED lights steady when the switch is stacked and the corresponding number
indicates its Stack ID.
• Active Unit ID LED - indicating this is the stack active unit.
• System LED - Every 20 seconds, the System LED will flash according to unit ID of the member unit.
• Flash = LED going off and then on again.
• According to unit ID of the unit. This means
• Unit 1 (if not active unit) - system LED will flash 1 time
• Unit 2 (if not active unit) - system LED will flash 2 times
• Unit 3 - system LED will flash 3 times
• Unit 4 -system LED will flash 4 times;
• The duration of each flash (LED off time) will be as follows:
• LED off time (in each flash) ~ 0.5 seconds.
• “Interim” LED on (between 2 LED offs) ~ 0.5 seconds
• If a member unit is removed from the stack, its system LED will continue to flash according to
above definition.
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.
•XG—(Green) Located on the right of a 10G port. The LED lights steady when another device is connected
to the port, is powered on, and a 10 Gbps link is established between the devices. When the LED is off,
the connection speed is under 10 Gbps or nothing is cabled to the port.
• Gigabit—(Green) Located on the right of the OOB and 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.
• 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.
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Front Panel LEDs

Configuring Switches
The switch can be accessed and managed by two different methods; 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.
The following table shows the default settings used when configuring your switch for the first time.
Default ValueParameter
ciscoUsername
ciscoPassword
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.
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Configuring Switches

The default username is cisco. The default password is cisco. Usernames and passwords are both case sensitive.
Step 7 Click Log In.
If this is the first time that you have logged on with the default username and password, the Change username and Password
page opens. The rules for constructing a new password are displayed on the page.
Step 8 Enter a new username and password and confirm.
Password complexity is enabled by default. The password must comply with the default complexity rules.
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
The Getting Started page opens. You are now ready to configure the switch. Refer to the Administration Guide or see
the help pages for further information.
Configuring Your Switch Using the Console Port
To configure the switch using the console port, proceed with the following steps:
Step 1 Connect a computer to the switch console port using a Cisco console cable (purchased separately) or a cable with mini
USB connector.
Step 2 Start a console port utility such as HyperTerminal on the computer.
Step 3 Configure the utility with the following parameters:
• 115200 bits per second
• 8 data bits
• no parity
• 1 stop bit
• no flow control
Step 4 Enter a username and password. The default username is cisco, and the default password is cisco. Usernames and passwords
are both case sensitive.
If this is the first time that you have logged on with the default username and password, the following message appears:
Please change your username AND password from the default settings. Change of credentials
is required for better protection of your network.
Please note that new password must follow password complexity rules
Step 5 Set a new administrator username and password.
Make sure that any configuration changes made are saved before exiting.
Caution
You are now ready to configure the switch. See the CLI Guide for your switch.
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Configuring Your Switch Using the Console Port

If you are not using DHCP on your network, set the IP address type on the switch to Static and change the static
IP address and subnet mask to match your network topology. Failure to do so may result in multiple switches
using the same factory default IP address of 192.168.1.254.
Note
Console access also provides additional interfaces for debug access which are not available via the web interface. These
debug access interfaces are intended to be used by a Cisco Support Team personnel, in cases where it is required to debug
device’s behavior. These interfaces are password protected. The passwords are held by the Cisco support team. The device
supports the following debug access interfaces:
• U-BOOT access during boot sequence
• Linux Kernel access during boot sequence
• Run time debug modes - allows Cisco support team to view device settings and apply protocol and layer 1 debug
commands and settings. The run time debug mode is accessible over telnet and SSH terminals in addition to console.
Navigation
The navigation menu, located at the top right of each UI page, lists the device’s main features.You can access
each feature’s UI pages using a series of cascading menus. To access an individual UI page, click the
corresponding feature tab in the navigation menu to display a menu of subcategories. Select a subcategory
and repeat this process until you see the desired page, and then select the page to display it in the main window.
Basic or Advanced Display Mode
The product supports many features, and therefore the WEB GUI includes hundreds of configuration and
display pages. These pages are divided into the following display modes:
•Basic—Basic subset of configuration options are available. If you are missing some configuration option,
select the Advanced mode in the device header.
• Advanced—Full set of configuration options are available.
When the user switches from basic to advanced, the browser reloads the page. However, after reload, the user
stays on the same page. When the user switches from advanced to basic, the browser reloads the page. If the
page exists also on the basic mode, the user stays on the same page. If the page does not exist in the basic
mode, the browser will load the first page of the folder which was used by the user. If the folder does not
exist, the Getting Started page will be displayed.
If there is advanced configuration, and the page is loaded in basic mode, a page-level message will be displayed
to the user (e.g. there are 2 radius server configured but in basic mode only a single server can be displayed,
or there is 802.1X port authentication with time range configured but time range is not visible in basic mode).
When switching from one mode to another, any configuration which was made on the page (without Apply)
is deleted.
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Navigation

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Basic or Advanced Display Mode