Lab 4: External BGP (eBGP) Inter-AS Peering | Lab Hands-on MikroTik

🎯 Sasaran Praktikum

Membangun sesi eBGP peering antar Autonomous System yang berbeda (AS 65001 dan AS 65002).

Tingkat Kesulitan: ADVANCED
Estimasi Waktu: 35 Menit
Target RouterOS: RouterOS v7 (v7.12+ recommended)

⏱️ Alur Kerja & Timeline Praktikum

Durasi	Fase Lab	Deskripsi Aktivitas
00:00 - 08:00	Pengalamatan Point-to-Point AS	Konfigurasi IP interkoneksi antar AS /30 dan loopback AS.
08:00 - 22:00	BGP Connection v7 Setup	Konfigurasi BGP connection dengan local.as dan remote.as serta router-id.
22:00 - 35:00	Verifikasi BGP State & Prefixes	Pastikan status session “established” dan prefixes routing bertukar di routing table.

🗺️ Topologi Jaringan

[R3-PE2: AS 65001] <=== eBGP Peering: 192.0.2.0/30 ===> [R4-Customer: AS 65002]

Daftar Perangkat dalam Topologi:

R1-ISP-A (AS65001) (mikrotik) - Interfaces: ether1 (mgmt), ether2, ether3, ether4
R2-ISP-B (AS65002) (mikrotik) - Interfaces: ether1 (mgmt), ether2, ether3, ether4
PC-Subnet-AS1 (pc) - Interfaces: eth1
PC-Subnet-AS2 (pc) - Interfaces: eth1

🛠️ Langkah Konfigurasi Lengkap (RouterOS v7)

Langkah 1: R3-PE2 (AS 65001) - Konfigurasi template BGP dan sesi eBGP RouterOS v7

# Node: R3-PE2 (AS 65001)
/routing bgp template add name=bgp-isp as=65001 router-id=10.255.0.3
/routing bgp connection add name=peer-cust remote.address=192.0.2.2 .as=65002 local.address=192.0.2.1 templates=bgp-isp disabled=no
/routing bgp session print

Langkah 2: R4-Customer (AS 65002) - Konfigurasi eBGP sisi customer

# Node: R4-Customer (AS 65002)
/routing bgp template add name=bgp-cust as=65002 router-id=192.0.2.2
/routing bgp connection add name=peer-isp remote.address=192.0.2.1 .as=65001 local.address=192.0.2.2 templates=bgp-cust disabled=no

🔍 Pengujian & Verifikasi CLI

Jalankan perintah verifikasi berikut di terminal WinBox / SSH untuk memastikan konfigurasi telah aktif dan valid:

/routing bgp session print
/ip route print where dynamic=yes

Ekspektasi Output Terminal:

[admin@R1-ISP-A] > /routing bgp session print
Flags: E - established
 0  E name="to-ISP-B" remote.address=172.16.12.2 remote.as=65002
      uptime=5m40s prefix-count=1

[admin@R1-ISP-A] > /ip route print
Flags: D - DYNAMIC; A - ACTIVE; b - BGP
Columns: DST-ADDRESS, GATEWAY, DISTANCE
0  DAb 10.2.0.0/16     172.16.12.2        20

✅ Checklist Keberhasilan Lab:

BGP Session memiliki Flag E (Established)
Rute dari AS tetangga masuk dengan flag DAb (Dynamic Active BGP) distance 20
Koneksi TCP port 179 BGP terbuka dan stabil

⚠️ Troubleshooting & Catatan Penting

[!WARNING] Pastikan port TCP 179 tidak diblokir oleh firewall filter.

[!WARNING] Di RouterOS v7, pastikan address family ip diaktifkan pada template/connection BGP.

📥 Panduan Lengkap & Resource

Gunakan panduan lengkap seluruh lab MikroTik certification di Panduan Lengkap Skenario Lab MikroTik atau ikuti kelas resmi tatap muka kami di Daftar Pelatihan MikroTik.