DZone

Multus CNI (Container Network Interface) is a novel approach to managing multiple CNIs in your container network (Kubernetes). Based on its name, which means multiple in Latin, Multus is an open-source plug-in, which serves as an additional layer in a container network, to enable multi-interface support. 

For example, Virtual Network Functions (VNFs) often depend on connectivity towards multiple network interfaces.

Source: DZone