[Bug 1791245] Re: bonding 802.3ad with systemd-networkd: duplicate MAC address on 2 different hosts

[lincvz]

A workaround is to set manually a different MAC address in bond0.netdev:


[NetDev]
Name=bond0
Kind=bond
MACAddress=16:d6:b0:24:16:3c

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https://bugs.launchpad.net/bugs/1791245

Title:
  bonding 802.3ad with systemd-networkd: duplicate MAC address on 2
  different hosts

Status in systemd package in Ubuntu:
  New

Bug description:
  The problem seems to incriminate systemd-networkd (v229-4ubuntu21.1), not the network/bonding configuration.
  When a full bonding configuration is made with systemd in /etc/systemd/network, on 2 two differents physical hosts, same hardware and in same VLAN:

  ----- bond0.netdev ------
  [NetDev]
  Name=bond0
  Kind=bond

  
  [Bond]
  Mode=802.3ad
  TransmitHashPolicy=layer3+4
  MIIMonitorSec=100ms
  LACPTransmitRate=fast

  ----- vlan3147.netdev ------
  [NetDev]
  Name=vlan3147
  Kind=vlan

  [VLAN]
  Id=3147

  ----- bond0.network ------
  [Match]
  Name=bond0

  [Network]
  VLAN=vlan3147
  BindCarrier=enp1s0f1 enp1s0f0
  LinkLocalAddressing=no

  ----- enp1s0f0.network ------
  [Match]
  Name=enp1s0f0

  [Network]
  Bond=bond0

  ----- enp1s0f1.network ------
  [Match]
  Name=enp1s0f1

  [Network]
  Bond=bond0

  ----- vlan3147.network ------
  [Match]
  Name=vlan3147

  [Address]
  Address=**masked ip***/25

  [Route]
  Destination=10.0.0.0/8
  Gateway=**masked ip***

  [Route]
  Destination=**masked ip***/16
  Gateway=**masked ip***

  
  And in /etc/modprobe.d/bonding.conf
  options bonding max_bonds=0

  .....  the two different physicals hosts have the same MAC address on
  bonding:

  on host A:

  32: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
      link/ether 16:d6:b0:24:16:3b brd ff:ff:ff:ff:ff:ff

  on host B:

  32: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
      link/ether 16:d6:b0:24:16:3b brd ff:ff:ff:ff:ff:ff

  
  So strange... how the MAC is generated ? There is no relevant rules in /etc/udev/rules.d/70-persistent-net.rules to explain it, and issue occurs only with systemd-network, *NOT* with legacy configuration /etc/network/interfaces.

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