ⓘ Create and detect VLAN devices before applying live configuration, parse live VLANs with their physical parent instead of a virtual alias, normalize persisted dotted VLAN names when the parent device exists, consistently target the real VLAN device across the ip, ifup and vconfig paths, skip recreating existing devices or activating absent disabled ones, and add regression coverage.
https://github.com/webmin/webmin/pull/2785
ⓘ Create and configure missing bond devices with ip link, attach partner interfaces before assigning addresses, avoid legacy module auto-creation when ip is available, and add regression coverage.
Ref.: https://github.com/webmin/webmin/pull/2777
- Preserve existing spacing and inline comments when rewriting `/etc/nsswitch.conf` `hosts:` lines.
- Preserve indentation, comment prefix, inline comments, and field separators when rewriting `/etc/hosts` rows.
- Add tests for the `nsswitch.conf` spacing/comment behavior.
ⓘ Treat Linux active virtual interfaces as secondary IP addresses instead of independent links, fixing alias parsing, hiding invalid status controls, rejecting down-state creation, and removing existing aliases with ip addr del when needed.
Reproduce path:
Example repro before this fix:
1. Go to **Network Configuration → Network Interfaces → Active Now**.
2. Click **Add a new interface**.
3. Enter:
```text
Name: enp0s5:1
IPv4 address: 10.211.55.21
Netmask: 255.255.255.0
Status: Down
```
4. Click **Create**.
Before the fix, Webmin could still create the alias or handle it inconsistently, because `enp0s5:1` is not a real link that can be “down”. It is just an extra IP address on `enp0s5`.
Expected after the fix:
- The UI should not offer `Status` for active virtual aliases.
- If someone submits `up=0` manually anyway, Webmin rejects it with:
`Virtual interfaces cannot be created with down status`
- If an existing active virtual alias is saved as down through lower-level code, Webmin removes the IP using something like:
```bash
ip addr del 10.211.55.21/24 dev enp0s5
```
* Note: Preserve existing Netplan indentation when updating DNS settings, validate with netplan generate before applying, and surface apply errors to avoid network loss from malformed YAML.
