Cisco Commands: Difference between revisions
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====Commands for cisco IOS devices (switches, routers, etc)==== | |||
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Show the entire mac address table (Lets you figure out what device is plugged into each switch port) | |||
show mac address-table | |||
List files in current directory | List files in current directory | ||
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service password-encryption | service password-encryption | ||
Show IP Address assigned to each interface | Show IPv4 IP Address assigned to each interface | ||
show ip interface brief | show ip interface brief | ||
Show IPv6 IP Address assigned to each interface | |||
show ipv6 interface brief | |||
Show all routes | Show all routes | ||
show ip route | show ip route | ||
<hr>Global configuration commands<hr> | <hr> | ||
====Global configuration commands==== | |||
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Set a banner message | Set a banner message | ||
banner motd MESSAGEHERE | banner motd MESSAGEHERE | ||
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line vty 0 15 | line vty 0 15 | ||
====Console or VTY line configuration commands==== | |||
Add a password to console port access | Add a password to console port access | ||
password itsasecret | password itsasecret | ||
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login | login | ||
<hr>Interface configuration commands<hr> | =====Enable ipv6 routing===== | ||
ipv6 unicast-routing | |||
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====Interface configuration commands==== | |||
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Set an IPv4 address on the interface | Set an IPv4 address on the interface | ||
ip address 192.168.0.1 255.255.255.0 | ip address 192.168.0.1 255.255.255.0 | ||
Change interface state to "up" | |||
no shutdown | |||
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=====Ipv6 Interface Commands===== | |||
<hr> | |||
Set an IPv6 address on the interface | Set an IPv6 address on the interface | ||
ipv6 address 2001:DB8:CAFE:1::1/64 | ipv6 address 2001:DB8:CAFE:1::1/64 | ||
Set a link-local address on the interface | |||
no | ipv6 addr fe80::1 link-local | ||
Remove an IPv6 address on the interface | |||
no ipv6 address 2001:DB8:CAFE:1::1/64 | |||
Remove all IPv6 addresses on the interface | |||
no ipv6 address | |||
Latest revision as of 00:34, 5 November 2025
Commands for cisco IOS devices (switches, routers, etc)[edit]
Show the entire mac address table (Lets you figure out what device is plugged into each switch port)
show mac address-table
List files in current directory
dir
List files in nvram
dir nvram:
Copy command destinatons (we use running-config as an example source file)
copy running-config cisco copy destinations
Elevate to root user
enable
Enter global configuration mode (You can use the do prefix to run regular commands from the config mode if you don't feel like running exit first)
configure terminal
Show startup config (the one stored in nvram for next boot)
show startup-config
Show running config (the one stored in ram and is currently in use)
show running-config
Copy the in-use config to the startup config so that it will be used on the next boot
copy running-config startup-config
Apply weak encryption to all unencrypted passwords. This only changes what is displayed in the config file, any password typed through a network cable is still transmitted in plain text.
service password-encryption
Show IPv4 IP Address assigned to each interface
show ip interface brief
Show IPv6 IP Address assigned to each interface
show ipv6 interface brief
Show all routes
show ip route
Global configuration commands[edit]
Set a banner message
banner motd MESSAGEHERE
Assign a default gateway
ip default-gateway 192.168.10.1
Change the machine's hostname (does not require a reboot)
hostname
Configure the console port (0)
line con 0
Configure the interface "vlan 1"
interface vlan 1
Configure vty interfaces 0 through 15
line vty 0 15
Console or VTY line configuration commands[edit]
Add a password to console port access
password itsasecret
Force users to enter the password to login
login
Enable ipv6 routing[edit]
ipv6 unicast-routing
Interface configuration commands[edit]
Set an IPv4 address on the interface
ip address 192.168.0.1 255.255.255.0
Change interface state to "up"
no shutdown
Ipv6 Interface Commands[edit]
Set an IPv6 address on the interface
ipv6 address 2001:DB8:CAFE:1::1/64
Set a link-local address on the interface
ipv6 addr fe80::1 link-local
Remove an IPv6 address on the interface
no ipv6 address 2001:DB8:CAFE:1::1/64
Remove all IPv6 addresses on the interface
no ipv6 address
