A k = 4 Clos Fat‑Tree datacenter topology (20 Debian 12 + FRRouting 8.4 routers + 4 hosts) ready to import in GNS3. The project showcases multi‑area OSPF v2 & v3, ECMP, and IPv4/IPv6 dual‑stack routing.
configs/ # All copy‑paste router & host configs
├─ 1-core/ # 4 core routers (R1 – R4)
├─ 2-agg/ # 8 aggregation (P1‑R3 … P4‑R4)
├─ 3-edge/ # 8 edge routers (P1‑R1 … P4‑R2)
└─ 4-hosts/ # 4 Linux hosts (H1 – H4)
docs/ # Diagrams & report
├─ Topology.png # Overview diagram
├─ Topology_Plan.pdf # Address‑plan table
└─ OSPF_report.pdf # 15‑page lab report (EN)
gns3/ # Lightweight GNS3 project stub (< 100 kB)
└─ project.gns3 # References the external QCOW2 disks
Why two delivery formats? GitHub blocks files > 25 MB, so QCOW2 disks are distributed separately (see below). You can still
git clonethe repo and immediately read docs/configs.
-
Google Drive (one‑click) – fat‑tree‑frr.gns3project.zip (≈ 80 MB)
-
GitHub Release (versioned) – latest release ▶ → grab
fat-tree-frr.gns3project.zip
Both archives contain
project.gns3+ all per‑VM QCOW2 disks insideproject-files/qemu/*/hda_disk.qcow2.
- File ▸ Import portable project ↪ select the ZIP.
- Leave “Copy base images” checked (recommended).
- Press Finish → the full topology appears, already wired and named.
- Start all nodes, then copy the configs from
configs/if you want to (re)apply them.
All text files can be pasted directly in ``.
configs/1-core/R1.txt # core example
configs/2-agg/P2-R3.txt # aggregation example
configs/3-edge/P4-R2.txt
configs/4-hosts/H1.txt
Naming: P x – R y means router Ry inside Pod x.
| File | What’s inside |
|---|---|
| Topology.png | Single‑page diagram with areas and links |
| Topology_Plan.pdf | Exhaustive address table (20 routers + 4 hosts) |
| OSPF_report.pdf | Step‑by‑step lab report |
- GNS3 ≥ 2.2 (local or server)
- QEMU ≥ 4.2 installed by GNS3
- At least 4 vCPU / 8 GB RAM to run the full lab
Author
Yassin El Hakouni – 2025
License
Distributed under the MIT License – see LICENSE.