[Bug 2000325] Re: ipv6 duplicate address prevents interface configuration

[Ryan Harper]

root at ubuntu:/home/ubuntu# networkctl status eth2-2 --no-pager 
● 2: eth2-2                                                           
             Link File: /run/systemd/network/10-netplan-eth2-2.link   
          Network File: /run/systemd/network/10-netplan-eth2-2.network
                  Type: ether                                         
                 State: carrier (failed)                 
                  Path: pci-0000:00:06.0                              
                Driver: virtio_net                                    
                Vendor: Red Hat, Inc.                                 
                 Model: Virtio network device                         
            HW Address: b8:38:61:bc:60:f6 (Cisco Systems, Inc)        
                   MTU: 1500 (min: 68, max: 65535)                    
  Queue Length (Tx/Rx): 1/1                                           
      Auto negotiation: no                                            
                 Speed: n/a                                           
     Activation Policy: up                                            
   Required For Online: yes                                           

Dec 22 16:53:58 ubuntu systemd-networkd[552]: eth2-2: Configuring route: dst: 6.1.6.254/32, src: n/a, gw: n/a, prefsrc: 6.1.6.1, scope: link, table: main, proto: static, type: unicast
Dec 22 16:53:58 ubuntu systemd-networkd[552]: eth2-2: Configuring route: dst: n/a, src: n/a, gw: 6.1.6.254, prefsrc: n/a, scope: global, table: main, proto: static, type: unicast
Dec 22 16:53:58 ubuntu systemd-networkd[552]: eth2-2: Configuring route: dst: n/a, src: n/a, gw: 2006:1:6::254, prefsrc: n/a, scope: global, table: main, proto: static, type: unicast
Dec 22 16:53:58 ubuntu systemd-networkd[552]: eth2-2: Setting routes
Dec 22 16:53:58 ubuntu systemd-networkd[552]: eth2-2: State changed: pending -> configuring
Dec 22 16:53:58 ubuntu systemd-networkd[552]: eth2-2: Forgetting route: dst: 2006:1:6::/116, src: n/a, gw: n/a, prefsrc: n/a, scope: global, table: main, proto: kernel, type: unicast
Dec 22 16:53:58 ubuntu systemd-networkd[552]: eth2-2: Setting address genmode done.
Dec 22 16:53:58 ubuntu systemd-networkd[552]: eth2-2: Could not set route: Invalid source address. Invalid argument
Dec 22 16:53:58 ubuntu systemd-networkd[552]: eth2-2: Failed
Dec 22 16:53:58 ubuntu systemd-networkd[552]: eth2-2: State changed: configuring -> failed


** Attachment added: "journal with systemd-networkd debug on calling netplan apply after ip addr flush eth2-2"
   https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2000325/+attachment/5637222/+files/journal-since-flush-netplan-apply.log

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https://bugs.launchpad.net/bugs/2000325

Title:
  ipv6 duplicate address prevents interface configuration

Status in systemd package in Ubuntu:
  New

Bug description:
  1) # lsb_release -rd 
  Description:	Ubuntu 20.04.5 LTS
  Release:	20.04

  2) # apt-cache policy systemd 
  systemd:
    Installed: 245.4-4ubuntu3.19
    Candidate: 245.4-4ubuntu3.19
    Version table:
   *** 245.4-4ubuntu3.19 500
          500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       245.4-4ubuntu3.15 500
          500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages
       245.4-4ubuntu3 500
          500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages

  3) Interface should be configured with all addresses and routes
  4) Interface is missing ipv4 and ipv6 static addresses and associated routes

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: systemd 245.4-4ubuntu3.19
  ProcVersionSignature: Ubuntu 5.4.0-135.152-generic 5.4.212
  Uname: Linux 5.4.0-135-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.25
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Thu Dec 22 16:13:11 2022
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  Lsusb-t:
   
  Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
  MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
  ProcEnviron:
   TERM=vt220
   PATH=(custom, no user)
   LANG=C.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-135-generic root=LABEL=cloudimg-rootfs ro console=tty1 console=ttyS0
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/01/2014
  dmi.bios.vendor: SeaBIOS
  dmi.bios.version: 1.13.0-1ubuntu1.1
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: http://192.168.14.1:4444/register.html
  dmi.modalias: dmi:bvnSeaBIOS:bvr1.13.0-1ubuntu1.1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-focal:cvnQEMU:ct1:cvrhttp//192.168.14.14444/register.html:
  dmi.product.family: cisco
  dmi.product.name: Standard PC (i440FX + PIIX, 1996)
  dmi.product.version: pc-i440fx-focal
  dmi.sys.vendor: QEMU

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