VLAN routing by Sub Interface on the Router

VLAN routing by Sub Interface on the Router

On the physical port of the router can be split into the logic Interface (sub interface), so we have to sub interface command

router (config) #interface f0/0.x        (x is any number from 1 to nearly 2 billion , this number when you configure any VLAN) and each sub will be packaged for each VLAN encapsulation dot1q command corresponding Vlan_ID. And we put in each sub IP address corresponding to the VLAN to represent you.

To better we configure the following example:

We use  Packet Tracer network diagram as follows: (Figure 1)

 Detail configuration:

+) On Router O:

Modem và Router khác nhau ra sao? Cách phân biệt giữa Modem và Router -  Thegioididong.com

+) On Switch 1 (I create VLAN 1 and add 2 port f0/3 – f0/2 port 4 on the trunk and f0/1 -f0/2)3.5.1 Packet Tracer - Basic VLAN Configuration Answers


+) On  Switch 2


+) At Switch3 (I create VLAN 3 and add 2 port f0/2 – f0/3 to 1 and trunk port f0/1).3.6.1 Packet Tracer – Implement VLANs and Trunking (Instructions Answer)


+) On the PC5, PC3, PC1 (I put in the order of ip network VLAN 1, VLAN 2 and VLAN 3) as shown in Figure 1

We testing with ping command to PCs


Next we configuration DHCP server  

+) On server 0

We configured for VLAN 3 and name it (Figure 3)


Next we configure on Router 0 as follows:


Finally you onto PC0, PC2, PC4 to DHCP mode, the pc will get IP network with that VLAN (Figure 4)How to configure multiple dhcp for different vlans in Cisco Packet Tracer


I wish you success

See more: Default route

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