Configuracion Basica Del Switch

Basic Switch Management v1.21 – Aaron Balchunas

1

- Basic Switch Management Catalyst Operating Systems
Catalyst switches, depending on the model, support one of two possible
operating systems:
• Catalyst OS (CatOS)
• IOS
The CatOS is an antiquated interface based on “set” commands. Retired
Catalyst models such as the 40xx and 50xx series supported the CatOS
interface.
ModernCatalyst switches support the Cisco IOS, enhanced with switchingspecific commands. Catalyst models that support the Cisco IOS include:
• 29xx series
• 35xx series
• 37xx series
• 45xx series
• 49xx series
• 65xx series
The Cisco IOS interface on Catalyst switches is nearly identical to that of the
router IOS (with the exception of the switching-specific commands). The
IOS is covered in greatdetail in other guides on this site, specifically:
• Router Components
• Introduction to the Cisco IOS
• Advanced IOS Functions
Some basic IOS concepts will be reviewed in this guide. For more
comprehensive information, please consult the above guides.

***
All original material copyright © 2007 by Aaron Balchunas (aaron@routeralley.com),
unless otherwise noted. All other material copyright© of their respective owners.
This material may be copied and used freely, but may not be altered or sold without the expressed written
consent of the owner of the above copyright. Updated material may be found at http://www.routeralley.com.

Basic Switch Management v1.21 – Aaron Balchunas

2

Using Lines to Configure the IOS
Three methods (or lines) exist to configure Cisco IOS devices(including
Catalyst switches):
• Console ports
• Auxiliary ports
• VTY (telnet) ports
Nearly every modern Cisco router or switch includes a console port,
sometimes labeled on the device simply as con. The console port is generally
a RJ-45 connector, and requires a rollover cable to connect to. The opposite
side of the rollover cable connects to a PC’s serial port using a serial
terminaladapter.
From the PC, software such as HyperTerminal is required to make a
connection from the local serial port to the router console port. The
following settings are necessary for a successful connection:
• Bits per second - 9600 baud
• Data bits - 8
• Parity - None
• Stop bits - 1
• Flow Control - Hardware
Some Cisco devices include an auxiliary port, in addition to the console
port.The auxiliary port can function similarly to a console port, and can be
accessed using a rollover cable. Additionally, auxiliary ports support modem
commands, thus providing dial-in access to Cisco devices.
Telnet, and now SSH, are the most common methods of remote access to
routers and switches. The standard edition of the IOS supports up to 5
simultaneous VTY connections. Enterprise editionsof the IOS support up
to 255 VTY connections.
There are two requirements before a Catalyst switch will accept a VTY
connection:
• An IP address must be configured on the Management VLAN
(by default, this is VLAN 1)
• At least one VTY port must be configured with a password

***
All original material copyright © 2007 by Aaron Balchunas (aaron@routeralley.com),
unless otherwise noted. Allother material copyright © of their respective owners.
This material may be copied and used freely, but may not be altered or sold without the expressed written
consent of the owner of the above copyright. Updated material may be found at http://www.routeralley.com.

Basic Switch Management v1.21 – Aaron Balchunas

IOS Modes on Cisco Catalyst Switches
The Cisco IOS is comprised of severalmodes, each of which contains a set
of commands specific to the function of that mode.
By default, the first mode you enter when logging into a Cisco device is
User EXEC mode. User mode appends a “>” after the device hostname:
Switch>

No configuration can be changed or viewed from User mode. Only basic
status information can be viewed from this mode.
Privileged EXEC mode allows all...