SIMULASI PERANCANGAN VLAN MENGGUNAKAN METODE NDLC UNTUK SEGMENTASI DAN PENGAMANAN JARINGAN DI SMKN 6 JAKARTA

FAUZI FERDYAN AMIRUL, . (2026) SIMULASI PERANCANGAN VLAN MENGGUNAKAN METODE NDLC UNTUK SEGMENTASI DAN PENGAMANAN JARINGAN DI SMKN 6 JAKARTA. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Jaringan komputer SMKN 6 Jakarta saat ini masih menggunakan arsitektur flat network yang menempatkan seluruh perangkat pengguna, siswa, guru, tamu, laboratorium, dan tata usaha, dalam satu broadcast domain tanpa segmentasi. Kondisi ini menyebabkan degradasi performa jaringan pada beban tinggi, di mana hasil pengujian langsung menggunakan iPerf3 pada jaringan nyata SMKN 6 Jakarta menunjukkan packet loss mencapai 45% dan jitter 19,968 ms ketika terdapat 5 klien aktif secara bersamaan. Selain itu, tidak adanya pemisahan trafik menimbulkan risiko keamanan berupa potensi akses tidak sah antarsegmen pengguna. Penelitian ini bertujuan untuk merancang dan mensimulasikan penerapan VLAN (Virtual Local Area Network) sebagai solusi segmentasi jaringan di SMKN 6 Jakarta menggunakan metode NDLC (Network Development Life Cycle), serta menguji konektivitas antarVLAN, kebijakan ACL, dan parameter delay dan packet loss berdasarkan pengukuran ICMP ping extended. Metode NDLC diterapkan melalui enam tahapan yaitu Analysis, Design, Simulation Prototype, Implementation, Monitoring, dan Management. Simulasi jaringan dilakukan menggunakan GNS3 dengan perangkat router Cisco C3725 yang dikonfigurasi sebagai Router-on-a-Stick menggunakan antarmuka baris perintah (CLI) Cisco IOS. Perlu dicatat bahwa seluruh konfigurasi CLI dalam penelitian ini dirancang khusus untuk router berbasis Cisco IOS dan tidak serta-merta kompatibel dengan perangkat dari produsen lain. Jaringan dibagi menjadi lima VLAN berdasarkan kelompok pengguna: VLAN 10 (Siswa), VLAN 20 (Guru), VLAN 30 (Tamu), VLAN 40 (Lab), dan VLAN 50 (TU/Server). Kebijakan keamanan diterapkan melalui Extended Access Control List (ACL). Berdasarkan hasil simulasi GNS3, rancangan VLAN berhasil memisahkan jaringan menjadi lima segmen, mengaktifkan inter-VLAN routing, dan menerapkan kebijakan ACL sesuai skenario uji. Pengukuran ICMP ping extended menunjukkan packet loss 0% dan delay rata-rata 15 – 40 ms pada skenario VLAN, yang berada dalam kategori "Bagus" sesuai standar TIPHON. Seluruh kebijakan ACL berjalan sesuai rancangan dengan tingkat keberhasilan 100%, terbukti dari respons "Communication administratively prohibited" pada setiap skenario pemblokiran yang diuji. Namun, parameter throughput dan jitter pada skenario VLAN belum dapat disimpulkan karena keterbatasan VPCS pada GNS3 yang tidak mendukung iPerf3 sebagai alat ukur. Oleh karena itu, rancangan ini layak dijadikan cetak biru awal (blueprint) dan perlu divalidasi melalui implementasi fisik atau simulasi berbasis node yang mendukung iPerf3. Kata kunci: VLAN, NDLC, QoS, GNS3, ACL, Router-on-a-Stick, flat network, jaringan sekolah (*****) The computer network at SMKN 6 Jakarta currently employs a flat network architecture that places all user devices, students, teachers, guests, laboratories, and administrative staff, within a single broadcast domain without segmentation. This condition results in network performance degradation under high load, where direct testing using iPerf3 on the actual SMKN 6 Jakarta network demonstrated packet loss reaching 45% and jitter of 19,968 ms when 5 clients were simultaneously active. Furthermore, the absence of traffic separation poses security risks in the form of potential unauthorized access between user groups. This study aims to design and simulate the application of VLAN (Virtual Local Area Network) as a network segmentation solution at SMKN 6 Jakarta using the NDLC (Network Development Life Cycle) method, and to test inter-VLAN connectivity, ACL policies, and delay and packet loss parameters based on ICMP ping extended measurements. The NDLC method was applied through six stages: Analysis, Design, Simulation Prototype, Implementation, Monitoring, and Management. Network simulation was conducted using GNS3 with a Cisco C3725 router configured as a Router-on-a-Stick using Cisco IOS command-line interface (CLI). It is important to note that all CLI configurations in this study are specifically designed for Cisco IOS-based routers and may not be directly compatible with devices from other manufacturers. The network was divided into five VLANs based on user groups: VLAN 10 (Students), VLAN 20 (Teachers), VLAN 30 (Guests), VLAN 40 (Laboratory), and VLAN 50 (Administration/Server). Security policies were enforced through Extended Access Control Lists (ACL). Based on GNS3 simulation results, the VLAN design successfully segmented the network into five segments, activated inter-VLAN routing, and enforced ACL policies according to the test scenarios. ICMP ping extended measurements showed 0% packet loss and an average delay of 15–40 ms in the VLAN scenario, which falls within the "Good" category according to TIPHON standards. All ACL policies functioned as designed with a 100% success rate, evidenced by "Communication administratively prohibited" responses in every tested blocking scenario. However, throughput and jitter parameters in the VLAN scenario could not be concluded due to the limitation of VPCS in GNS3, which does not support iPerf3 as a measurement tool. Therefore, this design serves as a viable initial blueprint and requires validation through physical implementation or simulation using nodes that support iPerf3. Keywords: VLAN, NDLC, QoS, GNS3, ACL, Router-on-a-Stick, flat network, school network.

Item Type:	Thesis (Sarjana)
Additional Information:	1). Muhammad Ficky Duskarnaen, M.Sc ; 2). Nur Elah, S.Kom., MT, CSA
Subjects:	Teknologi dan Ilmu Terapan > Teknik Komputer
Divisions:	FT > S1 Pendidikan Teknik Informatika Komputer
Depositing User:	Fauzi Ferdyan Amirul .
Date Deposited:	19 Aug 2026 02:35
Last Modified:	19 Aug 2026 02:35
URI:	http://repository.unj.ac.id/id/eprint/71614

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