Implementations of the disclosure describe provide link aggregation and high availability services via a network virtualization layer. A method of the disclosure relates to receiving, by a processing device of a host computer system executing a hypervisor, a network packet from a virtual machine managed by the hypervisor, generating a metadata item associated with the network packet, the metadata item comprising an identifier of a transmission mode for the network packet, and determining, by the processing device executing the hypervisor, in view of the identifier of the transmission mode of the metadata item, whether the transmission mode is one of a link aggregation (LA) mode, a high availability (HA) mode, or a combined LA and HA mode.