Overview
In this lab I built a network with three separate VLANs to segment traffic between departments. I then configured inter-VLAN routing so they could communicate through a Layer 3 switch.
Objectives
- Create and name VLANs on multiple switches
- Configure trunk links between switches
- Set up inter-VLAN routing using a Layer 3 switch
- Verify connectivity and traffic isolation between VLANs
Network Topology
Add your Packet Tracer screenshot here.
Configuration
VLAN Creation
Switch(config)# vlan 10
Switch(config-vlan)# name HR
Switch(config)# vlan 20
Switch(config-vlan)# name Sales
Switch(config)# vlan 30
Switch(config-vlan)# name IT
Trunk Port Configuration
Switch(config)# interface GigabitEthernet0/1
Switch(config-if)# switchport mode trunk
Switch(config-if)# switchport trunk allowed vlan 10,20,30
Inter-VLAN Routing
Switch(config)# interface vlan 10
Switch(config-if)# ip address 192.168.10.1 255.255.255.0
Switch(config-if)# no shutdown
Switch(config)# interface vlan 20
Switch(config-if)# ip address 192.168.20.1 255.255.255.0
Switch(config-if)# no shutdown
Testing
Verified connectivity using ping between hosts on different VLANs. Confirmed traffic isolation by checking that untagged traffic stayed within its VLAN.
What I Learned
- How VLANs segment broadcast domains
- The difference between access and trunk ports
- How a Layer 3 switch handles inter-VLAN routing without a separate router