[Bug 1753431] Re: bonding does not works

[Laurent Spagnol]

Physical interfaces are only used by bonding interfaces.
- bond0 have an ip address
- bond1 is user by bridges and vlans

I've solved my problem:

- by adding LACP parameters at module loading:
/etc/modprobe.d/netcf.conf
alias bond0 bonding
alias bond1 bonding
options bonding mode=4 lacp_rate=1 xmit_hash_policy=2 miimon=100 downdelay=200 updelay=200

- and nothing about bonding mode in ENI and netcfg.yaml !

My servers are "KVM/Libvirt" hosts.

* Bond0 is my "service" interface to the host

/etc/netplan/01-netcfg.yaml (yaml)                                                                                                                                                                                    
# Exemple de configuration des interfaces réseau pour l'hyperviseur
# => '/etc/netplan/01-netcfg.yaml'
#
# => 2 ports / LACP
# => La configuration des interfaces de virtualisation DOIT être effectuée
#    via '/etc/network/interfaces'

network:
 version: 2
 renderer: networkd
 ethernets:
   eno1:
     dhcp4: false
     dhcp6: false
   eno2:
     dhcp4: false
     dhcp6: false
 bonds:
   bond0:
     interfaces:
       - eno1
       - eno2
     addresses: [10.5.1.174/24]
     gateway4: 10.5.1.254
     nameservers:
       addresses: [193.50.208.4]
       search: [univ-reims.fr]

* Bond1 is used by VMs.
Note that Virt-manager NEEDs access to /etc/network/interfaces to work properly !!
I put "bond1" configuration in a included file (/etc/network/interfaces.d/bond1) of ENI because i don't want to allow any change on it by Virt-manager. So Virt-manager has only access to vlan/bridges interfaces.

/etc/network/interfaces
# Exemple de configuration des interfaces réseau pour Libvirt
# => '/etc/network/interfaces'
# => Libvirt peut accéder à ces interfaces
# => Définition des VLANs utilisés par Libvirt

source /etc/network/interfaces.d/bond1

auto vlan51
 iface vlan51 inet manual
 bridge_ports bond1.51
 bridge_stp off
 bridge_fd 0

auto vlan95
 iface vlan95 inet manual
 bridge_ports bond1.95
 bridge_stp off
 bridge_fd 0

auto vlan30
 iface vlan30 inet manual
 bridge_ports bond1.30
 bridge_stp off
 bridge_fd 0

/etc/network/interfaces.d/bond1                                                                                                                                                                                    
# Exemple de configuration des interfaces réseau pour Libvirt
# => '/etc/network/interfaces.d/bond1'
# => Libvirt ne peut pas accéder à ces interfaces
# => 2 interfaces physiques/LACP

auto eno3
 iface eno3 inet manual
 bond-master bond1

auto eno4
 iface eno4 inet manual
 bond-master bond1

auto bond1
 iface bond1 inet manual
 bond-slaves eno3 eno4

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https://bugs.launchpad.net/bugs/1753431

Title:
  bonding does not works

Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  I'm working on libvirt/kvm hypervisor
  I user 2 bondind interfaces:
  eno1 + eno2 => bond0 via "netplan" ("service" interface for hypervisor)
  eno3 + eno4 => bond1 via "ifupdown" ("virtualization" interface for libvirt)

  Since last upgrade (today), i got "Warning, no 802.3ad response from
  the link partner ..." with dmesg, bonding doesn't longer works with
  "netplan" and "ifupdown".

  Kernel problem ? ifenslave problem ?

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