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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 | #!/usr/bin/env python3
"""
Create a CCNA-level topology in the overgrowth GNS3 project
Classic topology: 2 routers + 2 switches + 2 PCs
"""
import requests
import json
import time
import sys
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):
"""Get project ID by 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):
"""Delete all existing nodes"""
resp = requests.get(f"{GNS3_API}/projects/{project_id}/nodes")
nodes = resp.json()
print(f"Deleting {len(nodes)} existing nodes...")
for node in nodes:
requests.delete(f"{GNS3_API}/projects/{project_id}/nodes/{node['node_id']}")
print(f" Deleted {node['name']}")
time.sleep(1)
def get_templates():
"""Get available templates"""
resp = requests.get(f"{GNS3_API}/templates")
return resp.json()
def find_template(templates, keywords):
"""Find template matching keywords"""
for t in templates:
name = t.get('name', '').lower()
for kw in keywords:
if kw.lower() in name:
return t
return None
def create_node(project_id, name, x, y, template=None, node_type=None):
"""Create a node"""
data = {
"name": name,
"compute_id": "local",
"x": x,
"y": y
}
if template:
data["node_type"] = template.get('template_type', 'qemu')
data["template_id"] = template['template_id']
elif node_type:
data["node_type"] = node_type
try:
resp = requests.post(
f"{GNS3_API}/projects/{project_id}/nodes",
json=data
)
if resp.status_code in [200, 201]:
return resp.json()
else:
print(f" Error creating {name}: {resp.status_code} - {resp.text}")
return None
except Exception as e:
print(f" Error creating {name}: {e}")
return None
def create_link(project_id, node1_id, adapter1, port1, node2_id, adapter2, port2):
"""Create a link between two nodes"""
data = {
"nodes": [
{
"node_id": node1_id,
"adapter_number": adapter1,
"port_number": port1
},
{
"node_id": node2_id,
"adapter_number": adapter2,
"port_number": port2
}
]
}
try:
resp = requests.post(
f"{GNS3_API}/projects/{project_id}/links",
json=data
)
return resp.json() if resp.status_code in [200, 201] else None
except Exception as e:
print(f" Link error: {e}")
return None
def main():
# Get project
project_id = get_project_id(PROJECT_NAME)
if not project_id:
print(f"Project '{PROJECT_NAME}' not found!")
return
print(f"Working with project: {PROJECT_NAME} ({project_id})")
# Clean up existing nodes
delete_all_nodes(project_id)
# Get templates
print("\nFetching templates...")
templates = get_templates()
# Look for IOSv router template
router_template = find_template(templates, ['IOSv', 'cisco ios', 'c7200'])
if router_template:
print(f" Found router: {router_template['name']}")
# Look for IOSvL2 switch template
switch_template = find_template(templates, ['IOSvL2', 'iosvl2', 'l2-ios'])
if switch_template:
print(f" Found switch: {switch_template['name']}")
# VPCS for PCs
vpcs_template = find_template(templates, ['VPCS', 'vpcs'])
if vpcs_template:
print(f" Found PC: {vpcs_template['name']}")
print("\n" + "="*60)
print("Creating CCNA Topology")
print("="*60)
print("""
Topology Design:
PC1 PC2
| |
[Switch1]---[Router1]---[Router2]---[Switch2]
| |
PC3 PC4
- 2 Routers (R1, R2) connected via serial/ethernet
- 2 Switches (SW1, SW2) one per router
- 4 PCs (PC1-4) for testing connectivity
""")
print("="*60 + "\n")
nodes = {}
# Create Router 1 (left side)
if router_template:
print("Creating Router1...")
nodes['R1'] = create_node(project_id, "R1", -200, -50, template=router_template)
if nodes['R1']:
print(f" ✓ Created {nodes['R1']['name']}")
time.sleep(1)
# Create Router 2 (right side)
if router_template:
print("Creating Router2...")
nodes['R2'] = create_node(project_id, "R2", 200, -50, template=router_template)
if nodes['R2']:
print(f" ✓ Created {nodes['R2']['name']}")
time.sleep(1)
# Create Switch 1 (left)
if switch_template:
print("Creating Switch1...")
nodes['SW1'] = create_node(project_id, "SW1", -200, 100, template=switch_template)
if nodes['SW1']:
print(f" ✓ Created {nodes['SW1']['name']}")
time.sleep(1)
else:
# Fallback to ethernet switch
print("Creating Switch1 (ethernet switch)...")
nodes['SW1'] = create_node(project_id, "SW1", -200, 100, node_type="ethernet_switch")
if nodes['SW1']:
print(f" ✓ Created {nodes['SW1']['name']}")
time.sleep(1)
# Create Switch 2 (right)
if switch_template:
print("Creating Switch2...")
nodes['SW2'] = create_node(project_id, "SW2", 200, 100, template=switch_template)
if nodes['SW2']:
print(f" ✓ Created {nodes['SW2']['name']}")
time.sleep(1)
else:
print("Creating Switch2 (ethernet switch)...")
nodes['SW2'] = create_node(project_id, "SW2", 200, 100, node_type="ethernet_switch")
if nodes['SW2']:
print(f" ✓ Created {nodes['SW2']['name']}")
time.sleep(1)
# Create PCs using VPCS
if vpcs_template:
print("Creating PC1...")
nodes['PC1'] = create_node(project_id, "PC1", -300, 100, template=vpcs_template)
if nodes['PC1']:
print(f" ✓ Created {nodes['PC1']['name']}")
time.sleep(0.5)
print("Creating PC2...")
nodes['PC2'] = create_node(project_id, "PC2", 300, 100, template=vpcs_template)
if nodes['PC2']:
print(f" ✓ Created {nodes['PC2']['name']}")
time.sleep(0.5)
print("Creating PC3...")
nodes['PC3'] = create_node(project_id, "PC3", -300, 200, template=vpcs_template)
if nodes['PC3']:
print(f" ✓ Created {nodes['PC3']['name']}")
time.sleep(0.5)
print("Creating PC4...")
nodes['PC4'] = create_node(project_id, "PC4", 300, 200, template=vpcs_template)
if nodes['PC4']:
print(f" ✓ Created {nodes['PC4']['name']}")
time.sleep(0.5)
# Create links
print("\n" + "="*60)
print("Creating Links")
print("="*60 + "\n")
links_created = 0
# R1 <-> R2 (core link)
if nodes.get('R1') and nodes.get('R2'):
print("Linking R1 <-> R2 (Gi0/0 <-> Gi0/0)...")
link = create_link(project_id,
nodes['R1']['node_id'], 0, 0,
nodes['R2']['node_id'], 0, 0)
if link:
print(f" ✓ Connected")
links_created += 1
# R1 <-> SW1
if nodes.get('R1') and nodes.get('SW1'):
print("Linking R1 <-> SW1 (Gi0/1 <-> port 0)...")
link = create_link(project_id,
nodes['R1']['node_id'], 1, 0,
nodes['SW1']['node_id'], 0, 0)
if link:
print(f" ✓ Connected")
links_created += 1
# R2 <-> SW2
if nodes.get('R2') and nodes.get('SW2'):
print("Linking R2 <-> SW2 (Gi0/1 <-> port 0)...")
link = create_link(project_id,
nodes['R2']['node_id'], 1, 0,
nodes['SW2']['node_id'], 0, 0)
if link:
print(f" ✓ Connected")
links_created += 1
# PC1 <-> SW1
if nodes.get('PC1') and nodes.get('SW1'):
print("Linking PC1 <-> SW1...")
link = create_link(project_id,
nodes['PC1']['node_id'], 0, 0,
nodes['SW1']['node_id'], 1, 0)
if link:
print(f" ✓ Connected")
links_created += 1
# PC3 <-> SW1
if nodes.get('PC3') and nodes.get('SW1'):
print("Linking PC3 <-> SW1...")
link = create_link(project_id,
nodes['PC3']['node_id'], 0, 0,
nodes['SW1']['node_id'], 2, 0)
if link:
print(f" ✓ Connected")
links_created += 1
# PC2 <-> SW2
if nodes.get('PC2') and nodes.get('SW2'):
print("Linking PC2 <-> SW2...")
link = create_link(project_id,
nodes['PC2']['node_id'], 0, 0,
nodes['SW2']['node_id'], 1, 0)
if link:
print(f" ✓ Connected")
links_created += 1
# PC4 <-> SW2
if nodes.get('PC4') and nodes.get('SW2'):
print("Linking PC4 <-> SW2...")
link = create_link(project_id,
nodes['PC4']['node_id'], 0, 0,
nodes['SW2']['node_id'], 2, 0)
if link:
print(f" ✓ Connected")
links_created += 1
# Summary
print("\n" + "="*60)
print("Topology Created!")
print("="*60)
print(f"\nNodes created: {len([n for n in nodes.values() if n])}")
print(f"Links created: {links_created}")
print("\nCCNA Lab Scenarios Ready:")
print(" • Static routing between R1 and R2")
print(" • OSPF/EIGRP dynamic routing")
print(" • Inter-VLAN routing on switches")
print(" • Access lists and security")
print(" • NAT/PAT configuration")
print(" • Basic switch configuration (VLANs, trunking)")
print("\nInitial IP Plan Suggestion:")
print(" Network 1 (Left): 10.1.1.0/24")
print(" - R1 Gi0/1: 10.1.1.1")
print(" - PC1: 10.1.1.10")
print(" - PC3: 10.1.1.11")
print(" Network 2 (Right): 10.1.2.0/24")
print(" - R2 Gi0/1: 10.1.2.1")
print(" - PC2: 10.1.2.10")
print(" - PC4: 10.1.2.11")
print(" WAN Link: 10.1.100.0/30")
print(" - R1 Gi0/0: 10.1.100.1")
print(" - R2 Gi0/0: 10.1.100.2")
print("\n✓ Open project in GNS3 GUI to start devices and configure!")
if __name__ == "__main__":
main()
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