Shulou(Shulou.com)06/01 Report--

Privileged mode: enable (en)

Global configuration mode: config terminal (conf t)

Interface mode: interface fastethernet module number / port number (int f0and1)

Enter multiple interfaces at the same time, int range f0Comp0-4.

Terminating domain name resolution: ctrl+shift+6

Exit to privileged mode: crtl+z end

Exit to the upper level: exit

Ctrl+A cursor to the command line start position

Ctrl+E cursor to end of command line

Command in privileged mode

Show version displays system ios name and version information

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

Configuration information viewed 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 View the process to 192.168.1.1

Restart: reload

View vlan:show vlan brief

Commands in global mode:

Host xx modified the hostname to xx

Restore interface to the default configuration: default interface f0lap1

Configure duplex mode: deplex [full | half | auto]

Configure the interface rate: speed [10 | 100 | 100]

Never time out:

Line con 0

Exec-timeout 0 0

Information synchronization:

Line con 0

Logging synchronous (logg syn)

Disable DNS query: no ip domain-lookup

Switch:

View the mac address table: show mac-address-table

View f0can1 information (including duplex mode and rate): show int f0pic1

Enable routing on layer 3 switches: ip routing

View interface mode status: show interface interface-id switchport

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 f0amp1 to vlan 2:

Conf t

Int f0/1

Switchport mode access

Switchport access vlan 2

Exit

Configure the switch virtual interface with ip:

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

Configure the privileged mode password:

In 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, the switch can be managed remotely through telnet. When remotely managing switches with different network segments, the switch needs to be configured with a default gateway

Trunk configuration:

Int f0/1

Switchport trunk encapsulation dot1q

Switchport mode trunk

Prohibit trunk from transmitting data from a certain vlan. Delete this vlan: switchport trunk allowed vlan remove vlan-id

To allow trunk to transfer data from a vlan, add this vlan: switchport trunk allowed vlan add vlan-id

Configure the Ethernet channel:

Interface range f0ax 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

Configure vtp pruning: Switch (config) # vtp pruning

Configure vtp version: Switch (config) # vtp version 2 (running version 1 by default)

View vtp configuration information: Switch# show vtp status

View the vtp password: Switch# show vtp password

Switch password recovery:

1. Turn on the computer and press the mode key

two。 Initialize flash: flash_init

3. Change config.text to config.old

Rename flash:config.text flash:config.old

4. Restart: boot

5. Change the configuration file name back to

Rename flash:config.old flash:config.text

6. Load the configuration file manually

Copy flash:config.text system:running-config

7. View configuration and modify

8. Aving: wr

Router:

View the arp cache table: show arp

Clear arp cache table: clear arp-cache

View all interfaces ip: sh ip int brief

View the routing table: show ip route (c-directly connected routes, s-static routes, slots-default routes)

Configure static route: ip route destination segment subnet mask address (interface address of the next-hop router through which the destination network is reached)

Configure the default route: ip route 0.0.0.0 0.0.0.0 address (next hop address)

No ip routing: turn off the router routing function and simulate the switch

Configure ip:

Int f0/0

Ip add 10.0.0.10 255.255.255.0

No shut down

Configure router-on-a-stick: you need to configure the encapsulation structure of the subinterface, vlan and ip

Int f0/0.1

Encapsulatation dot1q 10 (vlan-id)

Ip add 10.0.0.1 255.255.255.0

Int f0/0.2

...

Configure DHCP:

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

Dynamically assign ip address range: Router (dhcp-config) # network segment mask

Set the gateway address: Router (dhcp-config) # default-router gateway address

Configure the DNS address for the client: Router (dhcp-config) # dns-server dns-ip

Set address lease: 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

two。 Modify the value of the register: confreg0x2142

3. Restart: reset

4. Manually load the configuration file: copy startup-confg running-config

5. View configuration and modify

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

7. Save configuration: copy run star

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