eNSP Topology Skill#

Generate eNSP (Enterprise Network Simulation Platform) topology files as native .topo files that can be opened directly in eNSP.

How to create a topology#

1. Parse user's request to identify:

   • Network devices (routers, switches, PCs, Cloud, etc.)
   • Connections between devices
   • Optional: text labels, area boxes

2. Generate UUIDs for each device using a valid UUID v4 format

3. Calculate layout coordinates for devices using auto-layout algorithm

4. Build the .topo XML following the format in references/topo-reference.md

5. Write the file to current directory using Write tool

6. Open the result - print the file path so user can open it in eNSP

Output format#

Always output a .topo file. The user will open it in eNSP for simulation.

Example filenames:

• simple-network.topo
• ospf-topology.topo
• campus-network.topo

Device types supported#

Routers#

ModelDescriptionInterface ConfigAR201RouterEthernet x8 + Ethernet x1AR1220Router2GE + 8EthernetAR2220RouterGE x1 + GE x2 + Serial x2AR2240RouterGE x1 + GE x2AR3260RouterGE x1 + GE x2RouterGeneric RouterEthernet x2 + GE x4 + Serial x4NE40EEnterprise Router10x Ethernet (slot format)NE5000ECore Router10x Ethernet (slot format)NE9000Core Router10x Ethernet (slot format)R250DRouterGE x1

Switches#

ModelDescriptionInterface ConfigS3700SwitchEthernet x22 + GE x2S5700Switch24GECE6800Data Center Switch20x GE (slot format)CE12800Data Center Switch10x GE (slot format)CXSwitch10x Ethernet (slot format)

Firewalls#

ModelDescriptionInterface ConfigUSG5500FirewallGE x9USG6000VFirewallGE x1 (slot0) + GE x7 (slot1)

Wireless#

ModelDescriptionInterface ConfigAC6005Wireless AC8GEAC6605Wireless AC24GEAP2050Wireless AP5GEAP3030Wireless AP1GEAP4030Wireless AP2GEAP4050Wireless AP2GEAP5030Wireless AP2GEAP6050Wireless AP2GEAP7030Wireless AP2GEAP7050Wireless AP2GEAP8030Wireless AP3GEAP8130Wireless AP3GEAP9131Wireless AP2GEAD9430LTE Module28GESTAWireless StationWirelessCellphoneMobile DeviceWireless

Endpoints#

ModelDescriptionInterface ConfigPCPC1GELaptopLaptop1GEServerServer1EthernetClientClient1EthernetMCSMulticast Server1EthernetCloudCloud/BNIEthernet interfacesFRSWFrame Relay SwitchSerial x16HUBEthernet HUBEthernet x16

Connection types#

TypeDescriptionCopperEthernet cableSerialSerial cableAutoAuto-detect

Layout algorithm#

Use a simple grid-based auto-layout:

text

Grid spacing: 200px horizontal, 150px vertical
Device size: ~80x60px
Start position: (100, 100)

For each row:
  - Place devices horizontally with 200px gap
  - Move to next row when reaching canvas width (~1200px)

Adjust positions based on device types and connections to create logical groupings.

Adding text labels (txttips)#

Common labels for network diagrams:

• Loopback addresses: Loopback0:10.0.1.1/24
• Network segments: 10.0.12.0/24
• Area labels: Area0, Area1, AS 64512
• Device roles: Core Layer, Access Layer

Adding area boxes (shapes)#

Use type="1" shapes with appropriate colors to group devices:

• Same area devices in one rectangle
• Different colors for different areas/zones

File naming#

• Use lowercase with hyphens
• Descriptive name based on topology purpose
• End with .topo extension

Opening the result#

After writing the file, print the absolute path:

text

Topology saved to: C:\path\to\topology.topo
Please open this file in eNSP to view and simulate.

XML format reference#

Consult references/topo-reference.md for complete XML structure including:

• Device XML format with slots and interfaces
• Line XML format with interfacePair details
• Shape XML format for area boxes
• Txttip XML format for text annotations