<div style="max-width:800px" data-click-id="text"><div style="color:#D7DADC">Hey guys, Dealing with a weired issue where netplan is not detecting the uplink going down for one of it's primary slave and not selecting the other slave. I also tried setting up all parameters of mii-monitor-interval but that doesn't seems to be working either. root@core2:~# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.4 LTS Release: 18.04 Codename: bionic root@core2:~# uname -a Linux core2 4.15.0-121-generic #123-Ubuntu SMP Mon Oct 5 16:16:40 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux root@core2:~# dpkg -l | grep netplan ii <a href="https://netplan.io" rel="noopener nofollow ugc" target="_blank">netplan.io</a>0.98-0ubuntu1~18.04.1 amd64 YAML network configuration abstraction for various backends root@core2:~# Config file -> network: version: 2 renderer: networkd ethernets: enp6s0f0: dhcp4: no enp6s0f1: dhcp4: no bonds: bond0: addresses: - <a href="https://10.10.10.250/24" rel="noopener nofollow ugc" target="_blank">10.10.10.250/24</a> gateway4: <a href="https://10.10.10.1" rel="noopener nofollow ugc" target="_blank">10.10.10.1</a> nameservers: addresses: [<a href="https://8.8.8.8" rel="noopener nofollow ugc" target="_blank">8.8.8.8</a>] interfaces: - enp6s0f0 - enp6s0f1 parameters: mode: active-backup primary: enp6s0f0 mii-monitor-interval: 10s min-links: 1 down-delay: 50 Interesting issue is that event after setting mii-monitor-interval value to 10s, it's not updating on bond interface. It's shows 0ms and that means netplan is not monitoring the mii uplink. root@core2:~# cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) Bonding Mode: fault-tolerance (active-backup) Primary Slave: enp6s0f0 (primary_reselect always) Currently Active Slave: enp6s0f0 MII Status: up MII Polling Interval (ms): 0 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: enp6s0f1 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00:1b:21:3e:3f:29 Slave queue ID: 0 Slave Interface: enp6s0f0 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00:1b:21:3e:3f:28 Slave queue ID: 0 root@core2:~# Any help will be really appreciated. Thank you </div></div><div class="protonmail_signature_block protonmail_signature_block-empty"><div class="protonmail_signature_block-user protonmail_signature_block-empty"> </div><div class="protonmail_signature_block-proton protonmail_signature_block-empty"> </div></div><div> </div>