A Multilayer Switch acts as the core/distribution device Layer 2 switches function as access switches VLAN segmentation with centralized VLAN management using VTP Inter-VLAN routing using SVIs Dynamic routing using OSPF Internet access enabled through PAT (NAT Overload) End devices receive IP addresses via DHCP
🔹 VLAN Configuration
VLAN 10 – Sales
VLAN 20 – Bank Gateway IP addresses reserved and excluded from DHCP
Multilayer Switch configured as VTP Server Layer 2 Switches configured as VTP Clients 802.1Q trunk links between Multilayer Switch and L2 switches VLAN information automatically propagated to access switches
SVIs created on the Multilayer Switch Each VLAN uses the SVI as its default gateway
OSPF enabled between: Multilayer Switch ↔ Default Router All VLAN networks OSPF configured on both ends for full route exchange
Default route configured on Multilayer Switch pointing to the Default Router Default Router configured with a route towards the ISP
DHCP enabled on the Multilayer Switch Gateway IP addresses excluded Separate DHCP pools created for VLAN 10 and VLAN 20
PAT configured on the Default Router Allows multiple internal VLAN hosts to access the Internet using a single public IP
VLAN & Trunking (802.1Q) VTP (Server & Client modes) SVIs & Inter-VLAN Routing OSPF Dynamic Routing DHCP with IP Exclusion Default Routing PAT (NAT Overload) Cisco Packet Tracer
This project demonstrates the design and configuration of an enterprise-style campus network using a Multilayer (Layer 3) Switch, Layer 2 Access Switches, and a Default Router connected to an ISP. The lab is built and tested using Cisco Packet Tracer, focusing on real-world networking concepts.
Inter-VLAN communication tested using ping OSPF neighbor adjacency and routing table verification DHCP IP assignment confirmed for all VLAN hosts Internet access tested through PAT using simulated ISP connectivity.
👨💻 Author Sai Charen
Skilled in Networking, Cisco Packet Tracer, and Enterprise IT Solutions.