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765065a c7576e1 765065a c7576e1 765065a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 | #!/usr/bin/env python3
"""
Create a CCNA-ready topology using built-in GNS3 devices
Uses: Ethernet switches, VPCS for PCs, and Cloud for WAN simulation
"""
import requests
import json
import time
import os
GNS3_SERVER = os.getenv("GNS3_SERVER", "http://localhost:3080")
GNS3_API = f"{GNS3_SERVER}/v2"
PROJECT_NAME = os.getenv("GNS3_PROJECT_NAME", "overgrowth")
def get_project_id(name):
resp = requests.get(f"{GNS3_API}/projects")
projects = resp.json()
project = next((p for p in projects if p['name'] == name), None)
return project['project_id'] if project else None
def delete_all_nodes(project_id):
resp = requests.get(f"{GNS3_API}/projects/{project_id}/nodes")
nodes = resp.json()
print(f"Cleaning up {len(nodes)} existing nodes...")
for node in nodes:
requests.delete(f"{GNS3_API}/projects/{project_id}/nodes/{node['node_id']}")
time.sleep(1)
def create_vpcs(project_id, name, x, y):
"""Create a VPCS (Virtual PC)"""
data = {
"name": name,
"node_type": "vpcs",
"compute_id": "local",
"x": x,
"y": y
}
resp = requests.post(f"{GNS3_API}/projects/{project_id}/nodes", json=data)
return resp.json() if resp.status_code in [200, 201] else None
def create_switch(project_id, name, x, y, ports=8):
"""Create an Ethernet switch"""
data = {
"name": name,
"node_type": "ethernet_switch",
"compute_id": "local",
"x": x,
"y": y,
"properties": {
"ports_mapping": [
{"name": f"Ethernet{i}", "port_number": i, "type": "access", "vlan": 1}
for i in range(ports)
]
}
}
resp = requests.post(f"{GNS3_API}/projects/{project_id}/nodes", json=data)
return resp.json() if resp.status_code in [200, 201] else None
def create_cloud(project_id, name, x, y):
"""Create a Cloud node (simulates WAN/Internet)"""
data = {
"name": name,
"node_type": "cloud",
"compute_id": "local",
"x": x,
"y": y
}
resp = requests.post(f"{GNS3_API}/projects/{project_id}/nodes", json=data)
return resp.json() if resp.status_code in [200, 201] else None
def create_link(project_id, node1_id, adapter1, port1, node2_id, adapter2, port2):
data = {
"nodes": [
{"node_id": node1_id, "adapter_number": adapter1, "port_number": port1},
{"node_id": node2_id, "adapter_number": adapter2, "port_number": port2}
]
}
resp = requests.post(f"{GNS3_API}/projects/{project_id}/links", json=data)
return resp.json() if resp.status_code in [200, 201] else None
def main():
project_id = get_project_id(PROJECT_NAME)
if not project_id:
print(f"Project '{PROJECT_NAME}' not found!")
return
print(f"Building CCNA Topology in: {PROJECT_NAME}\n")
delete_all_nodes(project_id)
print("="*70)
print("CCNA LAB TOPOLOGY - Network Fundamentals Practice")
print("="*70)
print("""
Network Design:
VLAN 10 (Sales) VLAN 20 (Engineering) VLAN 30 (Guest)
PC1 PC3 PC5
| | |
┌────┴────┐ ┌────┴────┐ ┌────┴────┐
│ SW1 │─────────────│ SW2 │──────────────────│ SW3 │
│ Access │ Trunk │ Core │ Trunk │ Access │
└────┬────┘ └────┬────┘ └────┬────┘
| | |
PC2 PC4 PC6
VLAN 10 VLAN 20 VLAN 30
Internet Cloud (optional WAN simulation)
CCNA Skills Practiced:
- VLAN configuration and trunking
- Layer 2 switching concepts
- Inter-VLAN routing (when routers added)
- Basic connectivity testing
- Network troubleshooting
""")
print("="*70 + "\n")
nodes = {}
# Create switches
print("Creating Switches...")
nodes['SW1'] = create_switch(project_id, "SW1-Access", -300, 0, ports=8)
if nodes['SW1']: print(f" ✓ SW1-Access (VLAN 10 - Sales)")
time.sleep(0.5)
nodes['SW2'] = create_switch(project_id, "SW2-Core", 0, 0, ports=16)
if nodes['SW2']: print(f" ✓ SW2-Core (Trunk/Core)")
time.sleep(0.5)
nodes['SW3'] = create_switch(project_id, "SW3-Access", 300, 0, ports=8)
if nodes['SW3']: print(f" ✓ SW3-Access (VLAN 20 - Engineering)")
time.sleep(0.5)
# Create PCs
print("\nCreating Virtual PCs (VPCS)...")
nodes['PC1'] = create_vpcs(project_id, "PC1-Sales", -400, -100)
if nodes['PC1']: print(f" ✓ PC1-Sales (VLAN 10)")
time.sleep(0.3)
nodes['PC2'] = create_vpcs(project_id, "PC2-Sales", -400, 100)
if nodes['PC2']: print(f" ✓ PC2-Sales (VLAN 10)")
time.sleep(0.3)
nodes['PC3'] = create_vpcs(project_id, "PC3-Engineering", -100, -100)
if nodes['PC3']: print(f" ✓ PC3-Engineering (VLAN 20)")
time.sleep(0.3)
nodes['PC4'] = create_vpcs(project_id, "PC4-Engineering", 100, -100)
if nodes['PC4']: print(f" ✓ PC4-Engineering (VLAN 20)")
time.sleep(0.3)
nodes['PC5'] = create_vpcs(project_id, "PC5-Guest", 400, -100)
if nodes['PC5']: print(f" ✓ PC5-Guest (VLAN 30)")
time.sleep(0.3)
nodes['PC6'] = create_vpcs(project_id, "PC6-Guest", 400, 100)
if nodes['PC6']: print(f" ✓ PC6-Guest (VLAN 30)")
time.sleep(0.3)
# Create Cloud for Internet/WAN simulation
print("\nCreating WAN Simulation...")
nodes['Internet'] = create_cloud(project_id, "Internet", 0, 150)
if nodes['Internet']: print(f" ✓ Internet Cloud (WAN)")
time.sleep(0.5)
# Create links
print("\nCreating Network Links...")
links = 0
# PC1 -> SW1
if nodes.get('PC1') and nodes.get('SW1'):
if create_link(project_id, nodes['PC1']['node_id'], 0, 0, nodes['SW1']['node_id'], 0, 0):
print(f" ✓ PC1-Sales <-> SW1 (Port 0)")
links += 1
# PC2 -> SW1
if nodes.get('PC2') and nodes.get('SW1'):
if create_link(project_id, nodes['PC2']['node_id'], 0, 0, nodes['SW1']['node_id'], 1, 0):
print(f" ✓ PC2-Sales <-> SW1 (Port 1)")
links += 1
# SW1 -> SW2 (Trunk)
if nodes.get('SW1') and nodes.get('SW2'):
if create_link(project_id, nodes['SW1']['node_id'], 7, 0, nodes['SW2']['node_id'], 0, 0):
print(f" ✓ SW1 <-> SW2 (Trunk)")
links += 1
# PC3 -> SW2 (could be connected directly for mixed topology)
if nodes.get('PC3') and nodes.get('SW2'):
if create_link(project_id, nodes['PC3']['node_id'], 0, 0, nodes['SW2']['node_id'], 1, 0):
print(f" ✓ PC3-Engineering <-> SW2 (Port 1)")
links += 1
# PC4 -> SW2
if nodes.get('PC4') and nodes.get('SW2'):
if create_link(project_id, nodes['PC4']['node_id'], 0, 0, nodes['SW2']['node_id'], 2, 0):
print(f" ✓ PC4-Engineering <-> SW2 (Port 2)")
links += 1
# SW2 -> SW3 (Trunk)
if nodes.get('SW2') and nodes.get('SW3'):
if create_link(project_id, nodes['SW2']['node_id'], 7, 0, nodes['SW3']['node_id'], 7, 0):
print(f" ✓ SW2 <-> SW3 (Trunk)")
links += 1
# PC5 -> SW3
if nodes.get('PC5') and nodes.get('SW3'):
if create_link(project_id, nodes['PC5']['node_id'], 0, 0, nodes['SW3']['node_id'], 0, 0):
print(f" ✓ PC5-Guest <-> SW3 (Port 0)")
links += 1
# PC6 -> SW3
if nodes.get('PC6') and nodes.get('SW3'):
if create_link(project_id, nodes['PC6']['node_id'], 0, 0, nodes['SW3']['node_id'], 1, 0):
print(f" ✓ PC6-Guest <-> SW3 (Port 1)")
links += 1
# Internet -> SW2 (for future router uplink)
if nodes.get('Internet') and nodes.get('SW2'):
if create_link(project_id, nodes['Internet']['node_id'], 0, 0, nodes['SW2']['node_id'], 15, 0):
print(f" ✓ Internet Cloud <-> SW2 (Port 15)")
links += 1
# Summary
print("\n" + "="*70)
print("✓ CCNA LAB TOPOLOGY CREATED!")
print("="*70)
print(f"\nDevices: {len([n for n in nodes.values() if n])} nodes")
print(f"Links: {links} connections")
print("\n📚 CCNA LAB EXERCISES:")
print("\n Basic Configuration:")
print(" • Configure VLANs 10, 20, 30 on all switches")
print(" • Set trunk ports between SW1-SW2 and SW2-SW3")
print(" • Assign access ports to appropriate VLANs")
print(" • Configure PC IP addresses in respective subnets")
print("\n IP Addressing Scheme:")
print(" VLAN 10 (Sales): 10.1.10.0/24")
print(" - PC1: 10.1.10.10")
print(" - PC2: 10.1.10.11")
print(" VLAN 20 (Engineering): 10.1.20.0/24")
print(" - PC3: 10.1.20.10")
print(" - PC4: 10.1.20.11")
print(" VLAN 30 (Guest): 10.1.30.0/24")
print(" - PC5: 10.1.30.10")
print(" - PC6: 10.1.30.11")
print("\n VPCS Configuration Commands:")
print(" On PC1: ip 10.1.10.10/24 10.1.10.1")
print(" On PC2: ip 10.1.10.11/24 10.1.10.1")
print(" On PC3: ip 10.1.20.10/24 10.1.20.1")
print(" On PC4: ip 10.1.20.11/24 10.1.20.1")
print(" On PC5: ip 10.1.30.10/24 10.1.30.1")
print(" On PC6: ip 10.1.30.11/24 10.1.30.1")
print("\n Testing:")
print(" • Ping between PCs in same VLAN (should work)")
print(" • Ping between PCs in different VLANs (will fail without router)")
print(" • Use 'show vlan' to verify VLAN configuration")
print(" • Use 'show interfaces trunk' to verify trunk links")
print("\n Next Steps (When adding routers):")
print(" • Add router for inter-VLAN routing")
print(" • Configure router-on-a-stick (802.1Q)")
print(" • Setup DHCP server on router")
print(" • Configure NAT/PAT for Internet access")
print("\n🚀 Ready to start! Open GNS3 GUI to begin configuration.")
print("="*70)
if __name__ == "__main__":
main()
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