Router Switch Command summary

Privileged Mode:enable (en)

Global configuration mode:config terminal (conf t)

interface mode:interface fastethernet module number / port number (int f0/1)

simultaneous access to multiple interfaces int range F0/0–4

Terminate Domain name resolution:CTRL+SHIFT+6

exit to Privileged mode:Crtl+z End

exit to the previous level:exit

CTRL + a cursor to the command line start position

Ctrl+e cursor to the command line end position

Command under Privileged mode

Show version displays the system iOS name and version information

View current configuration information: show running-config (Sh run)

View the configuration information to save: show Startup-config (Shstar)

Save current configuration information:copy running-config startup-config (copy run star) = Write

Delete saved configuration information:erase NVRAM Erasestartup-config

Tracert 192.168.1.1 The process of seeing 192.168.1.1

Restart :Reload

View VLAN:Show VLAN Brief

Global Mode command:

Host XX modifies hostname to XX

The default configuration for the Restore interface is:default interface F0/1

Configure Duplex mode:deplex "full|half|auto"

Configure interface rate: Speed "10|100|100"

Never timeout:

Line con 0

Exec-timeout 0 0

Information synchronization:

Line con 0

Logging Synchronous (Logg SYN)

Disabled DNS Query:no IP domain-lookup

Switch:

View Mac Address table:show mac-address-table

View F0/1 information (including duplex mode and rate):Show int F0/1

Enable routing on layer three switches:IP Routing

View interface mode status: show interface Interface-id switchport

To create a VLAN:

1.vlan Database

VLAN vlan-id [name vlan-name]

Exit

2.conf T

VLAN Vlan-id

Name vlan-name

Exit

Assign Port f0/1 to VLAN 2:

Conf t

int F0/1

Switchport mode access

Switchport Access VLAN 2

Exit

Configure IP for the switch virtual interface :

int VLAN 1

IP Add 192.168.1.1 255.255.255.0

No sh

Configure the default gateway: IP default-gateway 192.168.1.254

Configure the Switch console port password:

Global mode:

Line Console 0

Password Cisco

Login

To configure the privileged mode password:

In the global mode:

Enable password Cisco ( plaintext )/Enablesecret Cisco ( ciphertext )

encrypted plaintext Password:service password-encryption

Configure vty password ;

Line vty 0 4

Password Cisco

Login

with the vty password and enable password set, you can remotely manage the switch via Telnet. Configuring a default gateway for a switch when managing different network segments remotely

Trunk Configuration :

int F0/1

Switchport Trunk Encapsulation dot1q

Switchport mode Trunk

prohibit trunk from transmitting data from a VLAN , remove this vlan:switchport trunk allowed VLAN remove vlan-id

allow trunk to transmit data from a VLAN, add this vlan:switchport trunk allowed VLAN add vlan-id

To configure an Ethernet channel:

Interface Range F0/1–2

Channel-group 1 mode on

View Ethernet Channel Configuration : Show EtherChannel 1 Summary

VTP Configuration:

Create a VTP domain:Switch (config) # VTP domain domain-name

Configure the VTP mode of the switch :switch (config) # VTP mode {server|client|transparent}

Configure VTP password:Switch (config) # VTP password password

Configuring VTP Pruning : Switch (config) # VTP pruning

Configure VTP version:Switch (config) # VTP version 2 ( run version 1 by default )

View VTP configuration information:switch# show VTP status

View VTP password:switch# show VTP password

Switch password recovery:

1. Press the mode key to boot

2. Initialize flash : flash_init

3. Change the Config.text to config.old

Rename Flash:config.text flash:config.old

4. Restart :boot

5. change the profile name back to

Rename Flash:config.old flash:config.text

6. manually load the configuration file

Copy Flash:config.text system:running-config

7. View the configuration and modify

8. Save:WR

Router:

viewing the ARP cache table:show ARP

Clear the ARP cache table:clear Arp-cache

View all interfaces ip:sh IP int Brief

View routing table:show ip route (C- link route,S- static route,s*- default route )

Configure static routes: IP route destination segment subnet mask address (the interface addresses of the next hop router that arrives at the destination network )

Configure default route: IP Route 0.0.0.0 0.0.0.0 address ( next hop )

No IP routing: turn off router routing function, analog switch

Configure IP:

int f0/0

IP Add 10.0.0.10 255.255.255.0

No shut down

Configuring a single-arm route: A package structure that requires the configuration of sub-interfaces , VLANs and IPs

int f0/0.1

Encapsulatation dot1q (vlan-id)

IP add 10.0.0.1 255.255.255.0

int f0/0.2

...

Configuration DHCP:

define IP address pool:Router (config) # ip dhcp pool pool-name

dynamically assigned IP address segment : Router (dhcp-config) # network segment mask

To set the gateway address: Router (dhcp-config) # Default-router gateway address

Configuring for Clients DNS Address:Router (dhcp-config) # dns-server Dns-ip

set the address lease period: Router (dhcp-config) # lease days

reserved statically assigned IP address : Router (dhcp-config) # ip dhcp excluded-address low-address[high-address]

Router Password recovery:

1. Interrupt boot:ctrl+break

2. change the value of the register:confreg0x2142

3. Restart :reset

4. manually load the configuration file:copy startup-confg Running-config

5. View the configuration and modify

6. Value of recovery register:config-register 0x2102

7. Save configuration:copy Run star

Router Switch Command summary