| Modes |
Description |
| Router> |
User mode |
| Router# |
Privileged mode |
| Router(config)# |
Global configuration mode |
| Router(config-if)# |
Interface mode |
| Command |
Description |
Syntax |
| Enable |
Puts you into privileged mode |
Router>enable
|
| Disable |
Takes you from privileged mode back to user mode |
Router>disable |
| Config Terminal |
Puts you in global configuration mode and change the running-config |
Router#config t |
| Hostname |
Sets the name of a router |
Router(config)#hostname R1 |
| Banner |
Creates a banner for users who log into the router |
Router(config)#banner motd # |
| Enable Password |
Sets the encrypted enable password |
Router(config)#enable password |
| Enable Secret |
Sets the encrypted enable secret. Supersedes the
enable password if set |
Router(config)#enable secret |
| Line Aux |
Puts in the auxiliary interface configuration mode |
Router(config)#line aux 0
Router(config-line)#login
Router(config)# password cisco
|
| Line Console 0 |
Puts you in the console configuration mode |
Router(config)#line console 0
Router(config-line)#login
Router(config)# password cisco
|
| Line Vty |
Puts you in VTY (Telnet) interface configuration
mode |
Router(config-line)#line vty 0 4
Router(config-line)#login
Router(config)# password cisco
|
| Service Password-encryption |
Encrypts the user mode and enable password |
Router(config)#service password-encryption |
| Terminal History Size |
Changes your history size from the default of 10
up to 256 |
Router#terminal history size 25 |
| Telnet |
Tests IP connectivity and configures a router |
Telnet [destination ip]
Router#telnet 172.16.10.2
|
| Ping |
Tests IP connectivity |
Ping [destination ip]
Router#ping 172.16.10.2
|
| Interface Fastethernet 0/0 |
Puts you in interface configuration mode for a
fastethernet port |
Router(config)#int fa 0/0 |
| Interface Serial 1 |
Puts you in configuration mode for interface serial
1 and can be used for show commands |
Router(config)#int serial 1 |
| Ip Address |
Sets an IP address on an interface |
Router(config)#ip address 172.16.10.2 255.255.255.0 |
| Bandwidth |
Sets the bandwidth on a serial interface |
Router(config-if)#bandwidth 64 |
| Copy Run Start |
Short for copy running-config, startup-config.
Places a configuration into NVRAM |
Router#copy run start |
| Erase Startup |
Deletes the startup-config |
Router#erase startup-config |
| Show Controllers S 0 |
Show the DTE or DCE status of an interface |
Router#sh controllers s 0 |
| Show History |
Shows you the last 10 commands entered by default |
Router#sh history |
| Show Interface S 0 |
Shows the statistics of interface serial 0 |
Router#sh int s 0 |
| Show Run |
Short for show running-config. Shows the configuration
currently running on the router |
Router#sh run |
| Show Start |
Short for show startup-config. Shows the backup
configuration stored in NVRAM |
Router#sh start |
| Show Terminal |
Shows you your configured history size |
Router#sh terminal |
| Show Version |
Shows you statistic of the router |
Router#sh ver |
| Shutdown |
Puts an interface in administratively-down mode |
Router(config-if)#shutdown |
| Command |
Description |
Syntax |
| Ip route |
Creates static and default routes on a router |
Ip route [destination_network] [mask] [next_hop_address or exitinterface] [administrative_distance] [permanent]
Example: Router(config)#ip route 172.16.20.0 255.255.255.0 172.16.10.2
|
| No ip route |
Removes a static default rout |
Router(config)#no ip route 172.16.20.0 255.255.255.0 172.16.10.2 |
| Router RIP |
Turns on ip rip routing on a router |
Router(config)#router rip |
| Network |
Tells the routing protocol what network to advertise |
Router(config-if)#network 172.16.20.0 |
| Router igrp AS |
Turns on ip igrp routing on a router |
Router igrp[Autonomous system no.]
Router(config)#router igrp 10
|
| Debug ip rip |
Sends console messages displaying information about
rip packets being sent and received on a router interface |
Router#debug ip rip |
| Debug ip igrp events |
Provides a summary of the igrp routing information
running on the network |
Router#debug ip igrp events |
| Debug ip igrp transactions |
Shows message requests from neighbor routes asking
for an update and the broadcast sent from your router to that
neighbor router |
Router#debug ip igrp transactions |
| Show ip route |
Displays the ip routing table |
Router#sh ip route |
| Show protocols |
Shows the routed protocols and network addresses
configured on each interface |
Router#sh protocols |
| Show ip protocols |
Shows the routing protocols and timers associated
with each routing protocol configured on a router |
Router#sh ip protocols |
| Command |
Description |
Syntax |
| Cdp enable |
Turns on cdp on an individual interface |
Router#cdp enable |
| No cdp enable |
Turns off cdp on an individual interface |
Router#no cdp enable |
| Cdp run |
Turns on cdp on a router |
Router#cdp run |
| No cdp run |
Turns off cdp completely on router |
Router#no cdp run |
| Cdp holdtime |
Changes the holdtime of cdp packets |
Router(config)#cdp holdtime 240 |
| Cdp timer |
Changes the cdp update timer |
Router(config)#cdp timer 90 |
| Clear line |
Clears a connection connected via telnet to your
router |
Router#clear line 2 |
| Config-register |
Tells the router how to boot and to change the
configuration register setting |
Router(config)#config-register 0x0101 |
| Copy flash tftp |
Copies a file from flash memory to a tftp host |
Router# copy flash tftp |
| Copy run start |
Copies the running-config file to the startup-config
file |
Router#copy run start |
| Copy run tftp |
Copies the running-config file to a tftp host |
Router#copy run tftp |
| Copy tftp flash |
Copies a file from a tftp host to flash memory |
Router#copy tftp flash |
| Copy tftp run |
Copies a configuration from a tftp host to the
running-config file |
Router#copy tftp run |
| Erase startup-config |
Deletes the contents of NVRAM on a router |
Router#erase startup-config |
| Ip host |
Creates a host table on a router |
Ip host[hostname] [ip address]
Example: Router(config)#ip host router2 172.16.10.2
|
| No ip host |
Removes a hostname from a host table |
Router(config)#no ip host router2 172.16.10.2 |
| Show cdp |
Displays the cdp timer and holdtime frequencies |
Router#sh cdp |
| Show cdp entry |
Same as show cdp neighbor detail, but does not
work on a 1900 switch |
Router#sh cdp entry |
| Show cdp interface |
Shows the individual interfaces enabled with cdp |
Router#sh cdp interface |
| Show cdp neighbor |
Shows the directly connected neighbors and the
details about them |
Router#sh cdp nei |
| Show cdp neighbor detail |
Shows the ip address and IOS version and type,
and includes all of the information from the show cdp neighbor
command |
Router#sh cdp neighbor detail |
| Show cdp traffic |
Shows the cdp packets sent and received on a device
and any errors |
Router#sh cdp traffic |
| Show flash |
Shows the files in flash memory |
Router#sh flash |
| Show hosts |
Shows the contents of the host table |
Router#sh hosts |
| Show sessions |
Shows your connections via telnet to remote device |
Router#sh sessions |