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:
+) 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)
+) On Switch 2
+) At Switch3 (I create VLAN 3 and add 2 port f0/2 – f0/3 to 1 and trunk port f0/1).
+) 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
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