Otdfbt

I upgraded to Ubuntu 18.04 and the new Netplan configuration, but my (2) network cards stopped sharing the load evenly. In my network configuration, I have many connections to many different servers; this configuration worked with previous versions of Ubuntu.

My configuration is below:

network:
ethernets:
 enp0s31f6:
 dhcp4: false
 enp1s0:
 dhcp4: false
version: 2
bonds:
 bond0:
 interfaces: [enp0s31f6,enp1s0]
 addresses: [10.0.10.10/16]
 gateway4: 10.0.0.1
 mtu: 9000
 nameservers:
 addresses: [10.0.0.1]
 search: [mydomain.example.com]
 parameters:
 mode: 802.3ad
 lacp-rate: fast
 mii-monitor-interval: 100

However, ifconfig shows uneven distribution of the network load:

bond0: flags=5187<UP,BROADCAST,RUNNING,MASTER,MULTICAST> mtu 9000
 inet 10.0.10.10 netmask 255.255.0.0 broadcast 10.0.255.255
 inet6 fe80::4876:c7ff:fecc:8a73 prefixlen 64 scopeid 0x20<link>
 ether 4a:76:c7:cc:8a:73 txqueuelen 1000 (Ethernet)
 **RX packets 7379403761 bytes 11148965732346 (11.1 TB)**
 RX errors 0 dropped 168862 overruns 8554 frame 0
 **TX packets 504974341 bytes 37356421339 (37.3 GB)**
 TX errors 0 dropped 6 overruns 0 carrier 0 collisions 0

enp0s31f6: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST> mtu 9000
 ether 4a:76:c7:cc:8a:73 txqueuelen 1000 (Ethernet)
 **RX packets 1251616 bytes 107128982 (107.1 MB)**
 RX errors 0 dropped 83864 overruns 0 frame 0
 **TX packets 1120861 bytes 238470225 (238.4 MB)**
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
 device interrupt 16 memory 0x92f00000-92f20000 

enp1s0: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST> mtu 9000
 ether 4a:76:c7:cc:8a:73 txqueuelen 1000 (Ethernet)
 **RX packets 7378152145 bytes 11148858603364 (11.1 TB)**
 RX errors 0 dropped 0 overruns 8554 frame 0
 **TX packets 503853480 bytes 37117951114 (37.1 GB)**
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
 device memory 0x92e00000-92e1ffff 

Any idea what is wrong with this configuration? Thank you for your help.

The following configuration work fine for me. Running Ubuntu 18.04 ppc64el. And BTW, if you want to use the REAL interface name instead of something like enp0s31f6, just do the following.

vi /etc/default/grub and add this:

GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0"

Then rebuilt the boot loader

grub-mkconfig -o /boot/grub/grub.vfg

Reboot the system and You'll get the real nic name like eth0, eth1...
When it's done, edit this file and make sure it fit with your IP's !!!

vi /etc/netplan/01-netcfg.yaml

# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
 version: 2
 renderer: networkd
 ethernets:
 eth0:
 match:
 macaddress: 'xx:xx:xx:xx:xx:xx'
 wakeonlan: true
 eth1:
 match:
 macaddress: 'xx:xx:xx:xx:xx:xx'
 wakeonlan: true
 bonds:
 bond0:
 interfaces: [eth0, eth1]
 addresses: [192.168.0.10/24]
 gateway4: 192.168.0.1
 parameters:
 mode: 802.3ad
 lacp-rate: fast
 mii-monitor-interval: 100
 mtu: 9000
 nameservers:
 search: [home.lan],
 addresses: [192.168.0.250]

Then, type netplan try to validate your configuration. If successful, run netplan apply and reboot.