Goal

Productize balance-slb as the recommended sane default bonding mode, to implement link aggregation without switch-side configuration. Balance-slb is now available for OVS and Linux bridges and their respective bondings.

User Stories

• As an OpenShift Virtualization administrator,
  I want to configure link aggregation without a need to reconfigure network switches,
  so my VM users get a resilient network without a need to reconfigure datacenter fabric.

Non-Requirements

• List of things not included in this epic, to alleviate any doubt raised during the grooming process.

Notes

• This is technically supported even today, but we don't do a great job advertising it and testing it end to end.
• See "balance-slb" in https://nmstate.io/devel/yaml_api.html
• See https://docs.openvswitch.org/en/stable/topics/bonding/
• https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/advanced_networking/network-bonding-considerations describes how to configures this on day-1 for the default cluster network. However, in our tests we should focus on day-2 configuration over dedicated secondary NICs