do show spanning-tree (do sh sp)

do show int trunk? ? ? (do sh int tr)

no ip domain lo

line con 0

logg syn

exec-t 0 0

// Stp mode

SwitchX(config)#do show spanning-tree

SwitchX(config)#spanning-tree mode rapid-pvst? = sp mo r

sw(config)#spanning-tree vlan 1 root primary

sw(config)#do show spanning-tree vlan 1

Sw(config)#int vlan 1

Sw(config-if)#ip add 1.1.1.1 255.255.255.0

Sw(config-if)#no shutdown

// Configures BPDU guard and PortFast on interface FastEthernet0/1

sw(config)#int fa0/1

sw(config-if)#switchport access 1

Sw(config-if)#spanning-tree portfast? ? ? ? ? ? ? ? ? = spa p

Sw(config-if)#spanning-tree bpduguard enable? ? ? ? ? = spa bp en?

// Enables PortFast on all nontrunking interfaces and enables BPDU guard globally for allPortFast-

enabled ports

Sw(config)#spanning-tree portfast edge bpduguard default? ??

Sw(config)#spanning-tree portfast default? ? ? ? ? =sp p de

// Turn off DTP after trunking

Sw(config)#int fa0/23

Sw(config-if)#switchport mode trunk

Sw(config-if)#switchport nonegotiate

//Assign dynamic trunk port

Sw(config)#int fa0/24

Sw(config-if)#switchport mode dynamic desirable

Sw(config)#do show int trunk

//config vtp server

Sw(config)#vtp domain CCNA

Sw(config)#vtp version 2

Sw(config)#vtp password ccna

Sw(config)#vtp mode server

Sw(config)#do sh vtp sta

//config vtp client

C1(config)#vtp domain CCNA

C1(config)#vtp password ccna

//三層交換機(jī) dhcp

dhcp(config)#ip dhcp pool aaa

dhcp(config)#network 1.1.1.0 255.255.255.0

dhcp(config)#default-router 1.1.1.1

dhcp(config)#int vlan 1

dhcp(config-if)#ip add 1.1.1.1 255.255.255.0? //關(guān)聯(lián) dhcp pool aaa的defalut-router address

dhcp(config)#ip routing

//cisco router ARP timeout on e0/0

R1(config)#int e0/0

R1(config-if)arp timeout 3600

R1(config)#do sh int e0/0