Network Analyser

This tool analysis network configuration to generate an analysis report and network graph. It utilises batfish as its analyser engine and N2G to plot network graphs.

The following are captured in the generated analysis reports.

- Node Properties
- Interface Properties
- VLAN Properties
- IP Owners
- Layer3 Edges
- MLAG Properties
- OSPF Configuration
- OSPF Interface Configuration
- OSPF Session Compatability
- BGP Configuration
- BGP Peer Configuration
- BGP Session Compatability
- Routing Table
- F5 VIP Configuration
- Named Structures
- Structure Definations
- References Structures
- Undefined Structure References
- Unused Structures


The following network graphs are generated that can be viewed in draw.io in a web browser.

- OSPF Graph
- BGP Graph
- L3 Network Graph

Requirements

This script uses batfish as the analysis engine and requires the batfish docker. Please follow the below steps to pull the latest batfish docker and run it.

docker pull batfish/allinone
docker run --name batfish -v batfish-data:/data -p 8888:8888 -p 9997:9997 -p 9996:9996 batfish/allinone

Install required python packages as captured in the requirements.txt file.

pip install -r requirements.txt

Note:- It is highly recommended that you create a new python virtual environment(for your own sanity(trust me))

For details on how to package a network configuration snapshot, please refer to here.

Executing the script

The following command executes the script.

python network-analyser.py

Sample Output

Script Execution

Generated Graph

After slight editing, the graph will look like this.