🔗 VLAN & Subnetting Lab
Inter-VLAN Routing · Student / Teacher / Staff Networks · Subnetting /29
200.200.200.0/24 → /29 subnets | 3 VLANs | 9 Workstations
📡 Network Topology
🔍 Click to zoom
📄 Packet Tracer File (Complete VLAN Lab)
VLAN 10,11,12 · Trunking · Router-on-a-stick · 9 PCs fully configured
Base Network
200.200.200.0/24
Subnet Mask
255.255.255.248 (/29)
VLANs
10 · 11 · 12
Devices
4 Switches · 1 Router · 9 PCs
📊 VLAN Allocation & IP Scheme
VLAN 10 · Student
Subnet200.200.200.0/29
Gateway200.200.200.1
Range200.200.200.2 – .6
PC0: 200.200.200.2
PC3: 200.200.200.3
PC6: 200.200.200.4
VLAN 11 · Teacher
Subnet200.200.200.8/29
Gateway200.200.200.9
Range200.200.200.10 – .14
PC1: 200.200.200.10
PC4: 200.200.200.11
PC7: 200.200.200.12
VLAN 12 · Staff
Subnet200.200.200.16/29
Gateway200.200.200.17
Range200.200.200.18 – .22
PC2: 200.200.200.18
PC5: 200.200.200.19
PC8: 200.200.200.20
⛔ Router OFF — intra‑VLAN only (Student↔Student, Teacher↔Teacher, Staff↔Staff)
📝 Step-by-Step Implementation
1Set Up the Topology
Add devices to workspace:
- 1 Router 2911
- 4 Switch 2960-24TT
- 9 PCs (PC0 through PC8)
💡 Connect all switches to Router's GigabitEthernet0/0 using trunk links (Router-on-a-Stick).
2Create VLANs on All Switches
Switch> enable
Switch# configure terminal
Switch(config)# vlan 10
Switch(config-vlan)# name student
Switch(config-vlan)# exit
Switch(config)# vlan 11
Switch(config-vlan)# name teacher
Switch(config-vlan)# exit
Switch(config)# vlan 12
Switch(config-vlan)# name staff
Switch(config-vlan)# exit
Switch# configure terminal
Switch(config)# vlan 10
Switch(config-vlan)# name student
Switch(config-vlan)# exit
Switch(config)# vlan 11
Switch(config-vlan)# name teacher
Switch(config-vlan)# exit
Switch(config)# vlan 12
Switch(config-vlan)# name staff
Switch(config-vlan)# exit
Switch# show vlan brief → VLANs 10, 11, 12 appear as active
3Configure Access Ports for PCs
Switch(config)# interface fastEthernet 0/1
Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan 10
Switch(config-if)# no shutdown
Switch(config-if)# exit
Switch(config)# interface fastEthernet 0/2
Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan 11
Switch(config-if)# exit
Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan 10
Switch(config-if)# no shutdown
Switch(config-if)# exit
Switch(config)# interface fastEthernet 0/2
Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan 11
Switch(config-if)# exit
4Configure Trunk Ports (Switch-to-Router)
Switch(config)# interface fastEthernet 0/4
Switch(config-if)# switchport mode trunk
Switch(config-if)# switchport trunk allowed vlan 10,11,12
Switch(config-if)# no shutdown
Switch(config-if)# switchport mode trunk
Switch(config-if)# switchport trunk allowed vlan 10,11,12
Switch(config-if)# no shutdown
5Configure Router-on-a-Stick (Sub-Interfaces)
Router> enable
Router# configure terminal
Router(config)# interface gigabitEthernet 0/0
Router(config-if)# no shutdown
Router(config-if)# exit
Router(config)# interface gigabitEthernet 0/0.10
Router(config-subif)# encapsulation dot1Q 10
Router(config-subif)# ip address 200.200.200.1 255.255.255.248
Router(config-subif)# exit
Router(config)# interface gigabitEthernet 0/0.11
Router(config-subif)# encapsulation dot1Q 11
Router(config-subif)# ip address 200.200.200.9 255.255.255.248
Router(config-subif)# exit
Router(config)# interface gigabitEthernet 0/0.12
Router(config-subif)# encapsulation dot1Q 12
Router(config-subif)# ip address 200.200.200.17 255.255.255.248
Router(config-subif)# exit
Router# configure terminal
Router(config)# interface gigabitEthernet 0/0
Router(config-if)# no shutdown
Router(config-if)# exit
Router(config)# interface gigabitEthernet 0/0.10
Router(config-subif)# encapsulation dot1Q 10
Router(config-subif)# ip address 200.200.200.1 255.255.255.248
Router(config-subif)# exit
Router(config)# interface gigabitEthernet 0/0.11
Router(config-subif)# encapsulation dot1Q 11
Router(config-subif)# ip address 200.200.200.9 255.255.255.248
Router(config-subif)# exit
Router(config)# interface gigabitEthernet 0/0.12
Router(config-subif)# encapsulation dot1Q 12
Router(config-subif)# ip address 200.200.200.17 255.255.255.248
Router(config-subif)# exit
Router# show ip interface brief → Sub-interfaces are up with IP addresses assigned
6Configure PC IP Addresses
- PC0 (Student): IP: 200.200.200.2, Mask: 255.255.255.248, Gateway: 200.200.200.1
- PC1 (Teacher): IP: 200.200.200.10, Mask: 255.255.255.248, Gateway: 200.200.200.9
- PC2 (Staff): IP: 200.200.200.18, Mask: 255.255.255.248, Gateway: 200.200.200.17
- PC3 (Student): IP: 200.200.200.3, Mask: 255.255.255.248, Gateway: 200.200.200.1
- PC4 (Teacher): IP: 200.200.200.11, Mask: 255.255.255.248, Gateway: 200.200.200.9
- PC5 (Staff): IP: 200.200.200.19, Mask: 255.255.255.248, Gateway: 200.200.200.17
- PC6 (Student): IP: 200.200.200.4, Mask: 255.255.255.248, Gateway: 200.200.200.1
- PC7 (Teacher): IP: 200.200.200.12, Mask: 255.255.255.248, Gateway: 200.200.200.9
- PC8 (Staff): IP: 200.200.200.20, Mask: 255.255.255.248, Gateway: 200.200.200.17
✅ Connectivity Test Results
| From | To | Same VLAN? | Router OFF | Router ON |
|---|---|---|---|---|
| PC0 (Student) | PC3 (Student) | ✅ Same | ✓ Success | ✓ Success |
| PC0 (Student) | PC1 (Teacher) | ❌ Diff | ✗ Fail | ✓ Success |
| PC0 (Student) | PC5 (Staff) | ❌ Diff | ✗ Fail | ✓ Success |
| PC1 (Teacher) | PC4 (Teacher) | ✅ Same | ✓ Success | ✓ Success |
| PC2 (Staff) | PC8 (Staff) | ✅ Same | ✓ Success | ✓ Success |
| PC6 (Student) | PC7 (Teacher) | ❌ Diff | ✗ Fail | ✓ Success |