Provision CLOS fabric using Dell EMC Networking NAPALM APIs example

This information describes how to use NAPALM to build a CLOS fabric with Dell EMC Networking OS10 switches. The sample topology is a two-tier CLOS fabric with two spines and four leafs connected as mesh. EBGP is running between the two tiers.

All switches in spine have the same AS number, and each leaf switch has a unique AS number. All AS number used are private. For application load-balancing purposes, the same prefix is advertised from multiple leaf switches and uses BGP multipath relax feature.

Step 1

Download the CLOS fabric configuration:

spine1 spine2 leaf1 leaf2 leaf3 leaf4

Copy all the downloaded configuration files in the the /root/napalm/clos_configuration directory.

Step 2

Load/merge the configuration for all the switches in the fabric.

Create a file called load_merge.py in a folder:

from napalm_base import get_network_driver

configs_dir = "/root/napalm/clos_configuration/" # add your configuration base directory path
commit_config = False # If you are happy with the changes, mark this as True
discard_config = True # Mark as True, To delete the uploaded configuration

# Add your global switch credentials
device_creds = {
    "username": "admin",
    "password": "admin",
    "optional_args": {
            "global_delay_factor": 3
    }
}

# Add your Switch specific details
fabric_details = {
    "spine1": {
        "hostname" : "1.1.1.1",
        "config_file": "spine1.cfg"
    },
    "spine2": {
        "hostname": "1.1.1.2",
        "config_file": "spine2.cfg"
    },
    "leaf1": {
        "hostname": "1.1.1.3",
        "config_file": "leaf1.cfg"
    },
    "leaf2": {
        "hostname": "1.1.1.4",
        "config_file": "leaf2.cfg"
    },
    "leaf3": {
        "hostname": "1.1.1.5",
        "config_file": "leaf3.cfg"
    },
    "leaf4": {
        "hostname": "1.1.1.6",
        "config_file": "leaf4.cfg"
    }
}

driver = get_network_driver('dellos10')

for key, value in fabric_details.iteritems():
    device_ip = value.get("hostname")
    config_file = configs_dir + value.get("config_file")

    device = driver(device_ip, **device_creds)
    device.open()
    print("{}: Started loading configuration ".format(key))
    device.load_merge_candidate(filename=config_file)
    print("Configuration difference to be applied on switch : {}".format(key))
    print(device.compare_config())

    if commit_config:
        device.commit_config()
        print("Configuration successfully loaded into switch: {}".format(key))

    if discard_config:
        device.discard_config()
        print("{}: Configuration discarded successfully".format(key))

    device.close()