Comment 0 for bug 1738085

I have a problem with bridge configuration for the interfaces on my system that I also happen to rename explicitly.

Specifically, I have following network configuration:

# WAN interface
auto wan
iface wan inet dhcp

# LAN interfaces
iface wlan inet manual
iface lan1 inet manual
iface lan2 inet manual
iface lan3 inet manual

# LAN bridge
auto lan
iface lan inet static
        address 10.0.0.1
        netmask 255.255.255.0
        bridge_ports wlan lan1 lan2 lan3

I use systemd .link files for renaming each of the 5 bridged interfaces, e.g.

cat /etc/systemd/network/10-lan1.link
[Match]
MACAddress=90:e2:ba:ae:e8:21

[Link]
Name=lan1

(BTW, I previously used udev rules to handle the renaming, before I migrated to systemd .link files hoping for improvement)

Upon system boot, I see following messages:

Dec 13 16:03:38 trout kernel: [ 2.619999] r8169 0000:03:00.0 lan3: renamed from eth0
Dec 13 16:03:38 trout kernel: [ 2.729493] igb 0000:01:00.0 wlan: renamed from eth1
Dec 13 16:03:38 trout kernel: [ 2.867121] igb 0000:01:00.2 lan2: renamed from eth2
Dec 13 16:03:38 trout kernel: [ 2.879221] igb 0000:01:00.1 lan1: renamed from eth0
Dec 13 16:03:38 trout kernel: [ 2.899203] igb 0000:01:00.3 wan: renamed from eth3
Dec 13 16:03:38 trout kernel: [ 20.572747] bridge: automatic filtering via arp/ip/ip6tables has been deprecated. Update your scripts t
o load br_netfilter if you need this.
Dec 13 16:03:38 trout kernel: [ 20.575364] device lan1 entered promiscuous mode
Dec 13 16:03:38 trout kernel: [ 20.705483] IPv6: ADDRCONF(NETDEV_UP): lan1: link is not ready
Dec 13 16:03:38 trout kernel: [ 21.097073] rename7: renamed from lan
Dec 13 16:04:29 trout systemd-udevd[466]: seq 2799 '/devices/virtual/net/lan' is taking a long time
Dec 13 16:04:59 trout systemd-udevd[540]: error changing net interface name 'lan' to 'lan1': File exists
Dec 13 16:04:59 trout systemd-udevd[540]: could not rename interface '7' from 'lan' to 'lan1': File exists
Dec 13 16:04:59 trout systemd[1]: Started ifup for lan.
Dec 13 16:04:59 trout systemd[1]: sys-subsystem-net-devices-lan1.device: Dev sys-subsystem-net-devices-lan1.device appeared twice with different sysfs paths /sys/devices/pci0000:00/0000:00:02.1/0000:01:00.1/net/lan1 and /sys/devices/virtual/net/lan
Dec 13 16:04:59 trout systemd[1]: sys-subsystem-net-devices-lan1.device: Dev sys-subsystem-net-devices-lan1.device appeared twice with different sysfs paths /sys/devices/pci0000:00/0000:00:02.1/0000:01:00.1/net/lan1 and /sys/devices/virtual/net/rename7
Dec 13 16:04:59 trout systemd-udevd[543]: Could not generate persistent MAC address for lan: No such file or directory
Dec 13 16:04:59 trout systemd[1]: Started ifup for lan.
Dec 13 16:04:59 trout systemd[1]: Found device /sys/subsystem/net/devices/lan.
Dec 13 16:04:59 trout kernel: [ 111.797526] device wlan entered promiscuous mode
Dec 13 16:04:59 trout ifup[1753]: /sbin/ifup: waiting for lock on /run/network/ifstate.lan
Dec 13 16:04:59 trout kernel: [ 111.943158] device lan3 entered promiscuous mode
Dec 13 16:05:00 trout kernel: [ 112.240052] r8169 0000:03:00.0 lan3: link down
Dec 13 16:05:00 trout kernel: [ 112.240081] r8169 0000:03:00.0 lan3: link down
Dec 13 16:05:00 trout kernel: [ 112.242397] IPv6: ADDRCONF(NETDEV_UP): lan: link is not ready
Dec 13 16:05:00 trout sh[1689]: Waiting for lan to get ready (MAXWAIT is 32 seconds).
Dec 13 16:05:00 trout CRON[1841]: (root) CMD ([ -x /usr/sbin/dma ] && /usr/sbin/dma -q1)
Dec 13 16:05:01 trout kernel: [ 113.610184] igb 0000:01:00.2 lan2: igb: lan2 NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX
Dec 13 16:05:01 trout kernel: [ 113.610324] lan: port 2(lan2) entered forwarding state
Dec 13 16:05:01 trout kernel: [ 113.610365] lan: port 2(lan2) entered forwarding state
Dec 13 16:05:01 trout kernel: [ 113.610486] IPv6: ADDRCONF(NETDEV_CHANGE): lan: link becomes ready

And after the boot process completes, the bridge is not configured as requested:
# brctl show
bridge name bridge id STP enabled interfaces
lan 8000.7085c2026d54 no lan2
                                                        lan3
                                                        wlan
rename7 8000.90e2baaee821 no lan1

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: systemd 229-4ubuntu21
ProcVersionSignature: Ubuntu 4.4.0-103.126-generic 4.4.98
Uname: Linux 4.4.0-103-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.14
Architecture: amd64
Date: Wed Dec 13 16:11:11 2017
InstallationDate: Installed on 2016-07-28 (503 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcEnviron:
 SHELL=/bin/bash
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-103-generic root=/dev/mapper/hostname--vg-root ro
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/27/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.00
dmi.board.name: QC5000-ITX/PH
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.00:bd10/27/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnQC5000-ITX/PH:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.