Topologiyamizda 3 ta oiladagi ip addresslar mavjud. Endi o'ylab ko'ring 3ta oiladagi ip addresslarni har biriga alohida default-gateway berishimiz kerak. Topologiyamizdagi routerni bitta portiga butun tarmoq ulangan. Hosh bu paytio'sha portga qaysi ip addressni beramiz? Shunaqa vaziyatlarda routerda SUBINTERFACE (1ta portni logic qismlarga bo'lish)hosil qilishimiz kerak.

Switch>enable
Switch#configure terminal
Switch(config)#hostname S1
S1(config)#vlan 30
S1(config-vlan)#name Bugalteriya
S1(config-vlan)#vlan 20
S1(config-vlan)#name IT
S1(config-vlan)#vlan 10
S1(config-vlan)#name Sales
S1(config-vlan)#exit
S1(config)#interface range fa0/1-2
S1(config-if-range)#switchport mode access
S1(config-if-range)#switchport access vlan 30
S1(config-if-range)#interface range fa0/3-4
S1(config-if-range)#switchport mode access
S1(config-if-range)#switchport access vlan 10
S1(config-if-range)#interface range fa0/5-6
S1(config-if-range)#switchport mode access
S1(config-if-range)#switchport access vlan 20
S1(config)#interface g0/1
S1(config-if)#switchport mode trunk
S1(config-if)#switchport trunk allowed vlan 10,20,30

Bu faqat birinchi switchni nastroykasi. Ikkinchi Switchni ham o'zingiz shu kabi nastroyka qilasiz.
Router>enable
Router#configure terminal
Router(config)#interface g0/0
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#interface g0/0.10
Router(config-subif)#encapsulation dot1Q 10
Router(config-subif)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#exit
Router(config)#interface gigabitEthernet 0/0.20
Router(config-subif)#encapsulation dot1Q 20
Router(config-subif)#ip address 192.168.3.254 255.255.255.0
Router(config-subif)#interface gigabitEthernet 0/0.30
Router(config-subif)#encapsulation dot1Q 30
Router(config-subif)#ip address 192.168.2.254 255.255.255.0
Router(config-subif)#exit

Tarmog'imiz tayyor eng bu holatda hamma VLANlar orasida paket o'tadi. Ikkinchi switch hamda router ulangan portni trunk qilish esingizdan chiqmasin.
Kanalga obuna bo'lishni unitmang-> @cisco_server

Topologiyamizda 3 ta oiladagi ip addresslar mavjud. Endi o'ylab ko'ring 3ta oiladagi ip addresslarni har biriga alohida default-gateway berishimiz kerak. Topologiyamizdagi routerni bitta portiga butun tarmoq ulangan. Hosh bu paytio'sha portga qaysi ip addressni beramiz? Shunaqa vaziyatlarda routerda SUBINTERFACE (1ta portni logic qismlarga bo'lish)hosil qilishimiz kerak.

Switch>enable
Switch#configure terminal
Switch(config)#hostname S1
S1(config)#vlan 30
S1(config-vlan)#name Bugalteriya
S1(config-vlan)#vlan 20
S1(config-vlan)#name IT
S1(config-vlan)#vlan 10
S1(config-vlan)#name Sales
S1(config-vlan)#exit
S1(config)#interface range fa0/1-2
S1(config-if-range)#switchport mode access
S1(config-if-range)#switchport access vlan 30
S1(config-if-range)#interface range fa0/3-4
S1(config-if-range)#switchport mode access
S1(config-if-range)#switchport access vlan 10
S1(config-if-range)#interface range fa0/5-6
S1(config-if-range)#switchport mode access
S1(config-if-range)#switchport access vlan 20
S1(config)#interface g0/1
S1(config-if)#switchport mode trunk
S1(config-if)#switchport trunk allowed vlan 10,20,30

Bu faqat birinchi switchni nastroykasi. Ikkinchi Switchni ham o'zingiz shu kabi nastroyka qilasiz.
Router>enable
Router#configure terminal
Router(config)#interface g0/0
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#interface g0/0.10
Router(config-subif)#encapsulation dot1Q 10
Router(config-subif)#ip address 192.168.1.254 255.255.255.0
Router(config-if)#exit
Router(config)#interface gigabitEthernet 0/0.20
Router(config-subif)#encapsulation dot1Q 20
Router(config-subif)#ip address 192.168.3.254 255.255.255.0
Router(config-subif)#interface gigabitEthernet 0/0.30
Router(config-subif)#encapsulation dot1Q 30
Router(config-subif)#ip address 192.168.2.254 255.255.255.0
Router(config-subif)#exit

Tarmog'imiz tayyor eng bu holatda hamma VLANlar orasida paket o'tadi. Ikkinchi switch hamda router ulangan portni trunk qilish esingizdan chiqmasin.
Kanalga obuna bo'lishni unitmang-> @cisco_server