Cisco IOS

Switch# configure terminal
Switch(config)#
Switch(config)# exit
Switch#
%SYS-5-CONFIG_I: Configured from console by console
Switch#

Other Configuration Mode

Switch(config)# interface FastEthernet 0/1
Switch(config-if)# exit
Switch(config)# line console 0
Switch(config-line)# end
Switch#

General commands

Get help

Switch> ?
Exec commands:
    connect     Open a terminal connection
    disable     Turn off privileged commands
    disconnect  Disconnect an existing network connection
    enable      Turn on privileged commands
    exit        Exit from the EXEC
    logout      Exit from the EXEC
    ping        Send echo messages
    resume      Resume an active network connection
    show        Show running system information
    ssh         Open a secure shell client connection
    telnet      Open a telnet connection
    terminal    Set terminal line parameters
    traceroute  Trace route to destination
Switch>

Restart the device

Save config from running config (RAM) to starting config (NVRAM)

Switch# copy running-config starting-config
Destination filename [startup-config]? 
Building configuration...
[OK]
Switch#

Reset the config

Details the running configuration file (RAM)

Show history of executed commands

Display the MAC address table

Execute configuration commands from the terminal

Erase all the config files

Switch# write erase
Erasing the nvram filesystem will remove all configuration files! Continue? [confirm]
[OK]
Erase of nvram: complete
%SYS-7-NV_BLOCK_INIT: Initialized the geometry of nvram
Switch# reload

Get the current boot settings of IOS

Switch# show boot
BOOT path-list      : c2960-lanbasek9-mz.150-2.SE4.bin
Config file         : flash:/config.text
Private Config file : flash:/private-config.text
Enable Break        : no
Manual Boot         : no
HELPER path-list    : 
Auto upgrade        : yes
NVRAM/Config file
      buffer size:   65536

Copy and restoration

Copy

Switch# copy flash: tftp:
Switch# !* Used to copy files from flash to tftp server

Save the running configuration on a tftp.

Switch# copy run tftp:
Address or name of remote host []? 192.168.10.2
Destination filename [Switch-confg]? 

Writing running-config....!!
[OK - 623 bytes]

623 bytes copied in 3.001 secs (207 bytes/sec)
Switch#

Save the IOS (file.bin) on a tftp.

Switch# copy flash: tftp: 
Source filename []? c2960-lanbase-mz.122-25.FX.bin
Address or name of remote host []? 192.168.10.2
Destination filename [c2960-lanbase-mz.122-25.FX.bin]? 

Writing c2960-lanbase
mz122-25.FX.bin....!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 4414921 bytes]

4414921 bytes copied in 3.079 secs (38958 bytes/sec)
Switch#

Restore

Switch# copy tftp: flash:
Switch# !* Used to restore file to flash from tftp server
Switch# copy tftp: run

Download IOS from a server (for an update or a reset)

Switch# copy tftp: flash: 
Address or name of remote host []? 192.168.10.2
Source filename []? c2960-lanbase-mz.122-25.FX.bin
Destination filename [c2960-lanbase-mz.122-25.FX.bin]? 
%Warning:There is a file already existing with this name
Do you want to over write? [confirm]

Accessing tftp://192.168.10.2/c2960-lanbase-mz.122-25.FX.bin...
Loading c2960-lanbase-mz.122-25.FX.bin from 192.168.10.2:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 4414921 bytes]

4414921 bytes copied in 0.063 secs (1904027 bytes/sec)
Switch#

Use another IOS file from the flash

Switch(config)# boot system c2960-lanbase-mz.122-25.FX.bin
Switch(config)# exit
Switch# copy running-config starting-config
Switch# reload

Show Cisco IOS version

Also shows uptime of router, how the router started, where system was loaded from, the interfaces the POST found, and the configuration register.

Switch# show version
Cisco IOS Software, C2960 Software (C2960-LANBASE-M), Version 12.2(25)FX, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2005 by Cisco Systems, Inc.
Compiled Wed 12-Oct-05 22:05 by pt_team

ROM: C2960 Boot Loader (C2960-HBOOT-M) Version 12.2(25r)FX, RELEASE SOFTWARE (fc4)

System returned to ROM by power-on

Cisco WS-C2960-24TT (RC32300) processor (revision C0) with 21039K bytes of memory.


24 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)

63488K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address       : 0060.702A.D2EB
Motherboard assembly number     : 73-9832-06
Power supply part number        : 341-0097-02
Motherboard serial number       : FOC103248MJ
Power supply serial number      : DCA102133JA
Model revision number           : B0
Motherboard revision number     : C0
Model number                    : WS-C2960-24TT
System serial number            : FOC1033Z1EY
Top Assembly Part Number        : 800-26671-02
Top Assembly Revision Number    : B0
Version ID                      : V02
CLEI Code Number                : COM3K00BRA
Hardware Board Revision Number  : 0x01


Switch   Ports  Model              SW Version              SW Image
------   -----  -----              ----------              ----------
*    1   26     WS-C2960-24TT      12.2                    C2960-LANBASE-M

Configuration register is 0xF

List the content of the flash (or a directory)

Switch# dir flash:
Directory of flash:/

    1  -rw-     4414921          <no date>  c2960-lanbase-mz.122-25.FX.bin
    4  -rw-     4670455          <no date>  c2960-lanbasek9-mz.150-2.SE4.bin
    2  -rw-        1622          <no date>  config.text
    3  -rw-         616          <no date>  vlan.dat

64016384 bytes total (54928770 bytes free)