Nik Afiq
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Creates enp1s0.50 on nik-debian (no L3 address, VLAN 40/node IP/default route untouched) for Multus to later attach macvlan/ipvlan workloads to. Verified live: enp1s0.50 is up with no IPv4 address (only the automatic IPv6 link-local, which is expected and harmless), default route unchanged. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
vlan50-parent
Creates enp1s0.50, a tagged VLAN 50 parent interface on nik-debian, for
Multus macvlan/ipvlan attachments (Phase 3/4 of ~/repo/homelab/plan.md).
Leaves the existing untagged VLAN 40 config (enp1s0's own address,
default route, k3s node identity, host DNS) untouched.
Before running
- Requires the managed-switch port for
nik-debianalready carrying VLAN 50 tagged in addition to its existing VLAN 40 untagged/PVID 40 — this is thehome-network-repo-owned switch/Flint handoff from plan.md Phase 1. This role has no way to verify that from the host side; if the switch isn't actually passing tagged VLAN 50 frames yet, the subinterface will come up with link state but no VLAN 50 traffic will ever arrive. - Confirm console/recovery access to
nik-debian(physical/IPMI/other out-of-band) before applying, same as any host networking change.
What it does
- Installs the
vlanpackage and loads/persists the8021qkernel module. - Writes
/etc/network/interfaces.d/enp1s0.50—iface ... inet manualwithvlan-raw-device enp1s0andvlan-id 50. No IP address is ever assigned to it. - Brings the interface up now (
ifup) if not already present, and asserts afterward that it's UP, carries no IPv4/IPv6 address, and that the host's own default route is still viaenp1s0— never viaenp1s0.50.
Rollback
sudo ifdown enp1s0.50 || true
sudo ip link delete enp1s0.50 2>/dev/null || true
sudo rm -f /etc/network/interfaces.d/enp1s0.50
sudo rm -f /etc/modules-load.d/8021q.conf
Leaves the vlan package and 8021q module load itself in place (harmless
if unused); remove manually only if desired.