Translating (IOS)

As explained in the previous tutorial, a ntc_rosetta driver can both parse and translate between native and yang-based models. In this tutorial we are going to translate data that complies to the openconfig model into native IOS configuration.

Let’s start by loading the needed driver:

from ntc_rosetta import get_driver

ios = get_driver("ios", "openconfig")
ios_processor = ios()

Now we need some data:

data = {
    "openconfig-interfaces:interfaces": {
        "interface": [
            {
                "name": "FastEthernet1",
                "config": {
                    "name": "FastEthernet1",
                    "type": "iana-if-type:ethernetCsmacd",
                    "description": "This is Fa1",
                    "enabled": False
                },
                "subinterfaces": {
                    "subinterface": [
                        {
                            "index": 1,
                            "config": {
                                "index": 1,
                                "description": "This is Fa1.1"
                            }
                        },
                        {
                            "index": 2,
                            "config": {
                                "index": 2,
                                "description": "This is Fa1.2"
                            }
                        }
                    ]
                }
            },
            {
                "name": "FastEthernet3",
                "config": {
                    "name": "FastEthernet3",
                    "type": "iana-if-type:ethernetCsmacd",
                    "description": "This is Fa3",
                    "enabled": True
                },
                "openconfig-if-ethernet:ethernet": {
                    "openconfig-vlan:switched-vlan": {
                        "config": {
                            "interface-mode": "ACCESS",
                            "access-vlan": 10
                        }
                    }
                }
            },
            {
                "name": "FastEthernet4",
                "config": {
                    "name": "FastEthernet4",
                    "type": "iana-if-type:ethernetCsmacd",
                    "enabled": False
                },
                "openconfig-if-ethernet:ethernet": {
                    "openconfig-vlan:switched-vlan": {
                        "config": {
                            "interface-mode": "TRUNK",
                            "trunk-vlans": [
                                10,
                                20
                            ]
                        }
                    }
                }
            }
        ]
    },
    "openconfig-network-instance:network-instances": {
        "network-instance": [
            {
                "name": "default",
                "config": {
                    "name": "default"
                },
                "vlans": {
                    "vlan": [
                        {
                            "vlan-id": 10,
                            "config": {
                                "vlan-id": 10,
                                "name": "prod",
                                "status": "ACTIVE"
                            }
                        },
                        {
                            "vlan-id": 20,
                            "config": {
                                "vlan-id": 20,
                                "name": "dev",
                                "status": "SUSPENDED"
                            }
                        }
                    ]
                }
            }
        ]
    }
}

Once we have the data, translating it to native is very simple:

native = ios_processor.translate(candidate=data)

We can verify the result by just printing it:

print(native)

interface FastEthernet1
   description This is Fa1
   shutdown
   exit
!
interface FastEthernet1.1
   description This is Fa1.1
   exit
!
interface FastEthernet1.2
   description This is Fa1.2
   exit
!
interface FastEthernet3
   description This is Fa3
   no shutdown
   switchport mode access
   switchport access vlan 10
   exit
!
interface FastEthernet4
   shutdown
   switchport mode trunk
   switchport trunk allowed vlan 10,20
   exit
!
vlan 10
   name prod
   no shutdown
   exit
!
vlan 20
   name dev
   shutdown
   exit
!