> ## Documentation Index
> Fetch the complete documentation index at: https://docs.siderolabs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Network Device Selector

> How to configure network devices by selecting them using hardware information

export const VersionWarningBanner = () => {
  const latestVersion = "v1.13";
  const [latestUrl, setLatestUrl] = useState(null);
  const [currentVersion, setCurrentVersion] = useState(null);
  const [isBeta, setIsBeta] = useState(false);
  const parseVersion = v => v.replace("v", "").split(".").map(Number);
  const isGreaterVersion = (a, b) => {
    const [aMajor, aMinor] = parseVersion(a);
    const [bMajor, bMinor] = parseVersion(b);
    if (aMajor > bMajor) return true;
    if (aMajor === bMajor && aMinor > bMinor) return true;
    return false;
  };
  useEffect(() => {
    if (typeof window === "undefined") return;
    const {pathname, hash, search} = window.location;
    const match = pathname.match(/\/talos\/(v\d+\.\d+)\//);
    if (!match) return;
    const detectedVersion = match[1];
    if (detectedVersion === latestVersion) return;
    setCurrentVersion(detectedVersion);
    if (isGreaterVersion(detectedVersion, latestVersion)) {
      setIsBeta(true);
    }
    const newPath = pathname.replace(`/talos/${detectedVersion}/`, `/talos/${latestVersion}/`);
    setLatestUrl(`${newPath}${search}${hash}`);
  }, []);
  if (!latestUrl || !currentVersion) return null;
  return <div className="not-prose sticky top-6 z-50 my-6">
      <div className="border border-yellow-500/30 bg-yellow-500/10 px-4 py-3 rounded-xl">
        <div className="text-sm">
          {isBeta ? <>
              ⚠️ You are viewing a <strong>beta version</strong> of Talos ({currentVersion}).
              This version may be unstable.
              <a href={latestUrl} className="ml-2 underline text-yellow-400 hover:text-yellow-300 font-medium">
                View latest stable version {latestVersion} →
              </a>
            </> : <>
              ⚠️ You are viewing an older version of Talos ({currentVersion}).
              <a href={latestUrl} className="ml-2 underline text-yellow-400 hover:text-yellow-300 font-medium">
                View the latest version {latestVersion} →
              </a>
            </>}
        </div>
      </div>
    </div>;
};

<VersionWarningBanner />

## Configuring Network Device Using Device Selector

`deviceSelector` is an alternative method of configuring a network device:

```yaml theme={null}
machine:
  ...
  network:
    interfaces:
      - deviceSelector:
          driver: virtio_net
          hardwareAddr: "00:00:*"
        address: 192.168.88.21
```

Selector has the following traits:

* qualifiers match a device by reading the hardware information in `/sys/class/net/...`
* qualifiers are applied using logical `AND`
* `machine.network.interfaces.deviceConfig` option is mutually exclusive with `machine.network.interfaces.interface`
* if the selector matches multiple devices, the controller will apply config to all of them

The available hardware information used in the selector can be observed in the `LinkStatus` resource (works in maintenance mode):

```yaml theme={null}
# talosctl get links eth0 -o yaml
spec:
  ...
  hardwareAddr: 4e:95:8e:8f:e4:47
  permanentAddr: 4e:95:8e:8f:e4:47
  busPath: 0000:06:00.0
  driver: alx
  pciID: 1969:E0B1
```

The following qualifiers are available:

* `driver` - matches a device by its driver name
* `hardwareAddr` - matches a device by its hardware address
* `permanentAddr` - matches a device by its permanent hardware address
* `busPath` - matches a device by its PCI bus path
* `pciID` - matches a device by its PCI vendor and device ID
* `physical` - matches only physical devices (vs. virtual devices, e.g. bonds and VLANs)

All qualifiers except for `physical` support wildcard matching using `*` character.

## Using Device Selector for Bonding

Device selectors can be used to configure bonded interfaces:

```yaml theme={null}
machine:
  ...
  network:
    interfaces:
      - interface: bond0
        bond:
          mode: balance-rr
          deviceSelectors:
            - permanentAddr: '00:50:56:8e:8f:e4'
            - permanentAddr: '00:50:57:9c:2c:2d'
```

In this example, the `bond0` interface will be created and bonded using two devices with the specified hardware addresses.
For bonding, use `permanentAddr` instead of `hardwareAddr` to match the permanent hardware address of the device, as `hardwareAddr` might change
as the link becomes part of the bond.