Error in network definition: Invalid MAC address 'random'

@vanillaoerba How did you end up in that situation? Did you modify /etc/netplan/90-NM-XXXXX.yaml manually?

Those special values for the MAC address should have been handled by the networkmanager.passthrough.cloned-mac-address=random setting for you..

Reducing to "Medium", as I don't think we can hit this situation through the Netplan-everywhere integration, but manual steps (wrong YAML config) must be involved in reaching this state.

We're working on a fix here: https://github.com/canonical/netplan/pull/427

This will be part of 1.0-1

This bug was fixed in the package netplan.io - 1.0-1

---------------
netplan.io (1.0-1) unstable; urgency=medium

  * New upstream release 1.0:
    - state/status: add support for identifying bridge/bond/vrf members !420
    - Netplan status --diff !440
    - Netplan state diff !386
    - allow COMMON_LINK_HANDLERS for VRFs (LP: #2031421, Closes: #1049432) !401
    - netplan: add support for WPA3-Enterprise (LP: #2029876) !402
    - wifi: support WPA2 and WPA3 Personal simultaneously !404
    - auth: add support for LEAP and EAP-PWD (LP: #2038811) !415
    - wifi: allow to have a psk and an eap password simultaneously !416
    - Migrate CriticalConnection to KeepConfiguration (LP: #1896799) !424
    - apply: bring "lo" back up if it's managed by NM (LP: # 2034595) !408
    - Post 0.107 cleanup & dropping API/ABI compat !400
    - ABI: Refactoring for libnetplan.so.1 !434
    - Add additional bridge port settings !410
    - SR-IOV improvements (VF-LAG support) !439
    Documentation:
    - Add spelling checking to the CI !417
    - doc: libnetplan API reference, using Doxygen and Sphinx.breathe !423
    - doc: Update 'Netplan everywhere' for 23.10 !418
    - added mii-monitor-interval !411
    - Adopt Docs Starter Pack !429
    - Fix howto docs !430
    - docs: add a topic about security !433
    - Document and restructure libnetplan's public API symbols !438
    - Lang. & formatting fixes in API docs. !441
    - Update examples.md !442
    Bug fixes:
    - GitHub CI fixes !405
    - util: don't return a placeholder netdef in the iterator !406
    - tunnels/validation: do not error out if "local" is not defined !407
    - cli/sriov: remove unused code !435
    - wireguard: ignore empty endpoints (LP: #2038811) !414
    - parse: improve the parsing of access-points (LP: #1809994) !413
    - tests: Add autopkgtest for LP: #1959570 !419
    - Fix permissions on folder '/run/NetworkManager/' !422
    - parse-nm/wg: append the correct prefix to IPv6 (LP: #2046158) !428
    - disable StartLimitBurst in the ovs-cleanup service (LP: #2047827) !431
    - ctests: stop including C files in the test files !432
    - workflow/coverity: install missing dependencies !436
    - state_diff: fix filtering of host scoped routes !426
    - sriov: don't generate duplicate entries in the rebind.service file !437
    - check if ovsdb-server.service is active before displaying warning !421
    - parser: accept the special MAC address options (LP: #2045096) !427
    - CI: fix NetworkManager autopkgtest not using deb822 !443
    - tests: Be less strict about systemctl daemon-reload (LP: #2048388)
    - Netplan status --diff refactoring !444
  * d/netplan-generator.install: Fix PLACEHOLDER location
  * d/netplan-generator.lintian-overrides: Clean up unused override
  * d/source/options: Ignore .envrc (direnv)
  * d/control: pkg-config -> pkgconf
  * d/rules: Make use of -Dpython.bytecompile=-1
  * d/control: Update short description
  * d/control,d/libnetplan1.symbols: Prepare for libnetplan1 SOVER bump
  * d/control: Add iproute2 build-dep (for running tests)
  * d/rules: Drop removal of legacy symlink (integrated in meson)
  * d/t/control: execute netplan diff test c...