Configure a network interface according to its macaddress

[Derrick Lin]

Dear all,

I am implementing a task which should configure a network interface according to the macaddress.

For example:

"ansible_eth1": {

            "active": true,

            "device": "eth1",

            "id": "8000.0050568d1cf8",

            "interfaces": [

                "peth1"

            ],

            "ipv4": {

                "address": "129.94.72.12",

                "broadcast": "129.94.72.63",

                "netmask": "255.255.255.192",

                "network": "129.94.72.0"

            },

            "ipv6": [

                {

                    "address": "fe80::250:56ff:fe8d:1cf8",

                    "prefix": "64",

                    "scope": "link"

                }

            ],

            "macaddress": "00:50:56:8d:1c:f8",

            "mtu": 1500,

            "promisc": false,

            "stp": false,

            "type": "bridge"

        },

The tricky part is, the device name (such as eth1) is not reliable, the OS may assign differently after reinstallation. So I can only rely on macaddress, then pass the device name to my shell script for configuration.

I attempted to work around with "when" and "with_items" but got syntax error all the time. Can someone show the correct way to do this?

Cheers,

Derrick