This project presents the complete network architecture redesign and simulation for the University of Moratuwa's core backbone and the Local Area Network (LAN) infrastructure of the Department of Electronic and Telecommunication Engineering (ENTC).
- Topology: Built as a resilient 9-node ring topology running the OSPF dynamic routing protocol.
- Links: Utilizes a primary 10 Gbps single-mode fiber channel paired with a 1 Gbps multi-mode fiber backup channel for disaster recovery and path redundancy.
- External Gateways: Connected to the Lanka Education and Research Network (LEARN) with a subscribed 240 Mbps internet bandwidth and 500 Mbps local bandwidth.
- Core Nodes: Connects major infrastructure hubs including the NOC, IT Faculty, Sumanadasa, Civil, Mechanical, Textile, Earth, Admin, and ENTC nodes.
The building-level LAN optimizes connectivity across three floors using a distinct two-layer topology:
- Core Switch Interconnect: A Layer 3 core switch anchors the departmental network, linking directly to the main campus backbone via a high-speed 10 Gbps fiber interface.
- Workload Distribution: Two separate Layer 2 access switches partition workloads downstream from the core switch—one handles ground and first-floor device aggregation, while the other manages second and third-floor operations.
- Sub-network Coverage: Features structured wire routing to specialized laboratories (Biomedical, Computer, Digital Electronics, Telecom, Microwave, Vision, and Department Offices) alongside 14 wireless access points for seamless internal mobility.
The network infrastructure design was built and fully validated inside Cisco Packet Tracer. The following operational parameters were tested successfully:
- Encapsulation Layer Checks: Proper encapsulation across Ethernet Frames (Layer 2) and IP Packets (Layer 3).
- End-to-End Diagnostics: ICMP Echo Requests and Replies (Pings) confirmed successful inter-subnet routing across all campus nodes.
- Transport Layer Verification: Checked connection-oriented data streams via TCP segments and connectionless transmissions via UDP datagrams.
- Address Resolution: ARP requests and replies executed properly to dynamically update MAC-to-IP binding tables.
K.A.G.D. Deshan M.I. Hewavitharana K.W.K. Kaushalya H.M.K. Shehan