Lesson No. 24 Introduction to Inter-vlan using router on a stick method.

Router-on-a-stick is a term frequently used to describe a setup up that consists of a router and switch connected using one Ethernet link configured as an 802.1q trunk link. In this setup, the switch is configured with multiple VLANs and the router performs all routing between the different networks/VLANs. It's a very popular term and commonly used in networks where no layer-3 switch exists.

Inter-vlan using router on a stick method.

Solution: The given topology is:

Steps:

Configuring steps for PC1:

VLAN 2: Sales

Ip address: 192.168.10.2

Subnet mask: 255.255.255.224

Default gateway: 192.168.10.10

Configuring steps for PC2:

VLAN 2: Sales

Ip address: 192.168.10.3

Subnet mask: 255.255.255.224

Default gateway: 192.168.10.10

Configuring steps for PC0:

VLAN 2: Sales

Ip address: 192.168.10.4

Subnet mask: 255.255.255.224

Default gateway: 192.168.10.10

Configuring steps for PC3:

VLAN 3: Accounts

Ip address: 192.168.10.33

Subnet mask: 255.255.255.224

Default gateway: 192.168.10.40

Configuring steps for PC4:

VLAN 3: Accounts

Ip address: 192.168.10.34

Subnet mask: 255.255.255.224

Default gateway: 192.168.10.40

Configuring steps for PC5:

VLAN 3: Accounts

Ip address: 192.168.10.35

Subnet mask: 255.255.255.224

Default gateway: 192.168.10.40

Configuring steps for switch0:

Switch>enable

Switch#config terminal

Switch(config)#vlan 2

Switch(config-vlan)#name sales

Switch(config-vlan)#interface range fa0/2 – fa0/4

Switch(config-if-range)# switchport mode access

Switch(config-if-range)#switchport access vlan 2

Switch(config-if-range)#exit

Switch(config)# vlan 3

Switch(config-vlan)# name account

Switch(config-vlan)# interface range fa0/5-fa0/7

Switch(config-if-range)# switchport mode access

Switch(config-if-range)# switchport access vlan 3

Switch(config-if-range)# exit

Switch(config)#interface fa0/1

Switch(config-if)# switchport mode trunk

Switch(config-if)# exit

Switch(config)#

Configuring steps for router:

Router0>enable

Router0#config terminal

Router0(config)#interface fa0/0

Router0(config-if)# interface fa0/0.1

Router0(config-subif)# encapsulation dot1Q 2

Router0(config-subif)# ip address 192.168.10.10 255.255.255.224

Router0(config-subif)# exit

Router0(config)# interface fa0/0

Router0(config-if)# interface fa0/0.2

Router0(config-subif)# encapsulation dot1Q 3

Router0(config-subif)# ip address 192.168.10.40 255.255.255.224

Router0(config-subif)# exit

Router0(config)#

Output:

Ping command from PC1 to PC5: