Basic knowledge
Autocomplete
Autocomplete: <TAB>
Switch#show ru<TAB> Switch#show running-config
List Available Commands: ?
Switch#show r? radius redundancy region registry reload rep resource rhosts rib rif rmon rom-monitor romvar route-map route-tag rpl running-config
Interface Name and abbreviation
FastEthernet0/1
orFa0/1
GigabitEthernet1/0/2
orGi1/0/2
TenGigabitEthernet1/0/3
orTe1/0/3
Port-channel1
orPo1
Vlan543
orVl543
Command Line Modes
User Mode
Switch>
Privileged Mode
Switch>enable Switch#
Configuration Mode
Switch#configure terminal Switch(config)#exit Switch#
Show
Show
show running-config
: running configurationshow interfaces
: detail of all interfacesshow interfaces Fa0/1
: detail of a specified interfaceshow interfaces status
: interface statusshow vlan
: VLANs in VLAN databaseshow mac address-table
: MAC address/port mappingshow arp
: ARP tableshow version
: hardware/software infomationshow ?
Output Modifier
<command> | include <expr> // output lines that include <expr> <command> | exclude <expr> // output lines without <expr> <command> | begin <expr> // output begins from the first line that includes <expr>
// spaces around "|" cannot be omitted! Switch#show arp | include 140.112.30.34 Internet 140.112.30.34 102 98f2.b3ee.bb4e ARPA Vlan30
Save Configuration # important
Switch#copy running-config startup-config or Switch#write memory
Global Configurations
set hostname
Switch(config)#hostname <name>
Cancel config
Switch(config)#no <command>
configuring passwords
enable password
Cisco IOS Security Configuration Guide, Release 12.2
CiscoLab(config)#enable secret CISCO CiscoLab#show running-config enable secret 5 $1$mERr$NJdjwh5wX8Ia/X8aC4RIu.
connection password
分為本地端連線 (console) 和 遠端終端連線 (vty)
Switch(config)#line console 0 // 設定本地介面編號 0 or Switch(config)#line vty 0 4 // 設定終端介面編號 0~4 Switch(config-line)#login Switch(config-line)#password cisco
啟用 password-encryption ( 其實是 encode )
Switch(config)#service password-encryption CiscoLab#show running-config line vty 0 4 password 7 0822455D0A16
Interface Configurations
choose interface
Switch(config)#interface FastEthernet0/1 Switch(config-if)#
set port access VLAN
Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 543
set port as a trunk port
Switch(config-if)#switchport mode trunk Switch(config-if)#switchport trunk allowed vlan 543,544
set switch IP on VLAN interfaces
Switch(config-if)#ip address 192.168.252.254 255.255.255.0
set channel group
Switch(config-if)#channel-group 1 mode active