Nornir-3.0 - Auto Routing Configuration

Auto Routing Configuration

This public repo contains python code that can be used to automate different routing configurations of a network.

The environment is pre-configure for setting the OSPF configuration of my local topologies. You can find the EVE-NG topologies in the zip file EVE-NG-topologies.zip.

You can change the hosts, and networks to be advertised in inventory/topo/hosts.yaml to automate your OSPF configuraions.

Where topo is the folder that contains the configuration for that topology, including:

• defaults.yaml
• groups.yaml
• hosts.yaml

Requirements

To use this code you will need:

• Python 3.8+

Install and Setup

Clone the code to local machine.

git clone https://github.com/kimdoanh89/nornir-3.0-routing-automation
cd nornir-3.0-routing-automation

Setup Python Virtual Environment (requires Python 3.8+)

python3.8 -m venv venv
source venv/bin/activate
pip3 install -r requirements.txt

You can edit the variables in the inventory/topo/hosts.yaml to set up your routing configurations.

Topology 1 - Automating OSPF configuration only

nw_advertised

nw_advertised is defined in hosts.yaml as a dictionary of OSPF area keys, and list of networks to be advertised in each OSPF area as values. Each Router will advertised some networks in a specific area.

R6:
    hostname: 192.168.65.136
    groups:
        - area0
    data:
        id: 6
        nw_advertised: {"0": ["192.1.101.0/24", "6.0.0.0/8", "192.1.67.0/24"]}

R7:
    hostname: 192.168.65.137
    groups:
        - area0
        - area10
    data:
        id: 7
        nw_advertised: {"0": ["192.1.67.0/24", "7.0.0.0/8"], "10": ["192.1.78.0/24"]}

R8:
    hostname: 192.168.65.138
    groups:
        - area10
    data:
        id: 8
        nw_advertised: {"10": ["192.1.78.0/24", "8.0.0.0/8"]}

For example, conisder the nw_advertised of R7

nw_advertised: {"0": ["192.1.67.0/24", "7.0.0.0/8"], "10": ["192.1.78.0/24"]}

R7 will advertise 2 networks in area 0: ["192.1.67.0/24", "7.0.0.0/8"]; and 1 network in area 10: ["192.1.78.0/24"]

Run

Run the script with the command:

time python scripts/topo1/ospf_configure.py

Output

The output is as follows:

Topology 2 - Automating interfaces configuration, EIGRP, OSPF, RIP configurations

Variables in hosts.yaml

There are some variables to be configured:

• interfaces: {name: interface ip address, ...}
• ospf_advertised: { area: [list of networks to be advertised], ...}
• eigrp_advertised: { autonomous system: [list of networks to be advertised], ...}
• rip_advertised: [list of networks to be advertised]

R6:
    hostname: 192.168.65.146
    groups:
        - area20
        - ospf
        - rip
    data:
        # interfaces: {name: interface ip address, ...}
        interfaces: {"e0/0": "192.1.56.6/24", "e0/1": "192.1.69.6/24",
                     "lo0": "6.6.6.6/8", "lo11": "66.66.66.66/8"}
        ospf_router_id: 6
        # ospf_advertised: { area: [list of networks to be advertised], ...}
        ospf_advertised: {"20": ["192.1.56.0/24", "6.0.0.0/8"]}
        # rip_advertised: [list of networks to be advertised]
        rip_advertised: ["192.1.69.0", "66.0.0.0"]

R7:
    hostname: 192.168.65.147
    groups:
        - eigrp
    data:
        # interfaces: {name: interface ip address, ...}
        interfaces: {"e0/0": "192.1.17.7/24", "lo0": "7.7.7.7/8",
                     "lo11": "77.77.77.77/8", "lo201": "207.1.4.1/24",
                     "lo202": "207.1.5.1/24", "lo203": "207.1.6.1/24",
                     "lo204": "207.1.7.1/24"
                    }
        # eigrp_advertised: { autonomous system: [list of networks to be advertised], ...}
        eigrp_advertised: {"100": ["0.0.0.0/0"]}

Run

Run the script with the command:

time python scripts/topo2/configure_interfaces-ospf-eigrp-rip-redistribute.py

Output

The output is as follows: