The script is proposed to deploy a network topology drawn in draw.io using containerized FRR as routers. The script uses Docker file creates docker-compose file and container configuration files (docker-start, per container image).

A mapping between draw.io and docker objects is depicted on the figure below: You can use any shapes for router and broadcast networks. IPv4 subnets are supported right now only. You can use prefix length <= /29 since docker host uses one address from each subnet.

1. Clone the repo

git clone https://github.com/alekshi/topology_builder.git
cd topology_builder/

2. Draw a network diagram using draw.io and export to xml (without compressing). If VRFs are going to be used, put them in a list after new line in router name (like: VRF:[RED,GREEN,BLUE])
3. To use MPLS with Linux kernel, load additional modules:

   modprobe mpls_router
   modprobe mpls_gso
   modprobe mpls_iptunnel

4. Lanuch topology_builder.py to create docker-compose file and frr/docker-start file

./topology_builder.py -f <XML topology file path>

Default settings include:

• Ellipse as router
• Rectangle as broadcast network
• All FRR daemons are enable
• MPLS is disable
• IPv6 is disable
• SSH authentication by login/password (root/root) Use --help to see all options

5. Launch docker-compose file to create topology

docker-compose up -d

6. Check ports what are exposed for ssh connection using docker container ls By default 2000+ ports are used for ssh and root/root credentials. It is possible to create own password or use public key for SSH authentication. Use --help