[Bug 1950049] Re: NetworkManager renderer for Netplan ignores link-local: []

Sat Nov 6 20:05:24 UTC 2021

** Package changed: ubuntu => ubiquity (Ubuntu)

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https://bugs.launchpad.net/bugs/1950049

Title:
  NetworkManager renderer for Netplan ignores link-local: []

Status in netplan.io package in Ubuntu:
  New

Bug description:
  If I am trying to get rid of IPv4 and IPv6 addresses on a particular interface using Netplan, if I use NetworkManager as the renderer, it does not follow the last of these three Netplan documentation examples:
  Example to enable only IPv4 link-local: link-local: [ ipv4 ]
  Example to enable all link-local addresses: link-local: [ ipv4, ipv6 ]
  Example to disable all link-local addresses: link-local: [ ]

  /etc/netplan/01-network-manager-all.yaml
  network:
    version: 2
    renderer: NetworkManager
    ethernets:
      lan:
        match:
          macaddress: a8:20:XX:XX:9f:da
        dhcp6: true
        addresses:
          - 192.168.1.3/24
        routes:
          - to: default
            via: 192.168.1.1
            metric: 100
        nameservers:
          addresses: [192.168.1.1]
          search: []
        set-name: lan
      softether:
        match:
          macaddress: 40:6c:XX:XX:4a:93
        optional: true
        link-local: []
        set-name: softether

  Followed by `netplan generate` and `netplan apply`, results of `ip a` for the softether interface...
  2: softether: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
      link/ether 40:6c:XX:XX:4a:93 brd ff:ff:ff:ff:ff:ff
      altname enp9s0
      inet 169.254.65.216/16 brd 169.254.255.255 scope link noprefixroute softether
         valid_lft forever preferred_lft forever
      inet6 fd8b:a698:e8f4:3:426c:8fff:fe35:4a93/64 scope global deprecated dynamic mngtmpaddr 
         valid_lft 769sec preferred_lft 0sec
      inet6 fd97:65c2:6883:1:426c:8fff:fe35:4a93/64 scope global dynamic mngtmpaddr 
         valid_lft 1785sec preferred_lft 1785sec
      inet6 fda2:db11:4cad:2:426c:8fff:fe35:4a93/64 scope global deprecated dynamic mngtmpaddr 
         valid_lft 769sec preferred_lft 0sec
      inet6 fdaa:ed5f:f69b:4:426c:8fff:fe35:4a93/64 scope global deprecated dynamic mngtmpaddr 
         valid_lft 770sec preferred_lft 0sec
      inet6 fe80::426c:8fff:fe35:4a93/64 scope link 
         valid_lft forever preferred_lft forever

  However, if the renderer is changed to networkd...
  network:
    version: 2
    renderer: networkd
    ethernets:
      lan:
        match:
          macaddress: a8:20:XX:XX:9f:da
        dhcp6: true
        addresses:
          - 192.168.1.3/24
        routes:
          - to: default
            via: 192.168.1.1
            metric: 100
        nameservers:
          addresses: [192.168.1.1]
          search: []
        set-name: lan
      softether:
        match:
          macaddress: 40:6c:XX:XX:4a:93
        optional: true
        link-local: []
        set-name: softether

  Then `netplan generate` and `netplan apply`, results of `ip a` for the softether interface...
  2: softether: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
      link/ether 40:6c:XX:XX:4a:93 brd ff:ff:ff:ff:ff:ff
      altname enp9s0

  To recap, using NetworkManager as the renderer for Netplan fails to
  eliminate IPv4 and IPv6 addresses when setting link-local: [].

  ProblemType: Bug
  DistroRelease: Ubuntu 21.10
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 5.13.0-20.20-generic 5.13.14
  Uname: Linux 5.13.0-20-generic x86_64
  NonfreeKernelModules: wl zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu71
  Architecture: amd64
  CasperMD5CheckResult: pass
  Date: Sat Nov  6 12:51:59 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  InstallationDate: Installed on 2021-11-05 (0 days ago)
  InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  Symptom: installation
  UpgradeStatus: No upgrade log present (probably fresh install)

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