Features

Open Virtual Network (OVN) offers the following virtual network services:

  • Layer-2 (switching)

    Native implementation. Replaces the conventional Open vSwitch (OVS) agent.

  • Layer-3 (routing)

    Native implementation that supports distributed routing. Replaces the conventional Neutron L3 agent. This includes transparent L3HA :doc::routing support, based on BFD monitorization integrated in core OVN.

  • DHCP

    Native distributed implementation. Replaces the conventional Neutron DHCP agent. Note that the native implementation does not yet support DNS features.

  • DPDK

    OVN and the OVN mechanism driver may be used with OVS using either the Linux kernel datapath or the DPDK datapath.

  • Trunk driver

    Uses OVN’s functionality of parent port and port tagging to support trunk service plugin. One has to enable the ‘trunk’ service plugin in neutron configuration files to use this feature.

  • VLAN tenant networks

    The OVN driver does support VLAN tenant networks when used with OVN version 2.11 (or higher).

  • DNS

    Native implementation. Since the version 2.8 OVN contains a built-in DNS implementation.

  • Port Forwarding

    The OVN driver supports port forwarding as an extension of floating IPs. Enable the ‘port_forwarding’ service plugin in neutron configuration files to use this feature.

  • Packet Logging

    Packet logging service is designed as a Neutron plug-in that captures network packets for relevant resources when the registered events occur. OVN supports this feature based on security groups.

  • Segments

    Allows for Network segments ranges to be used with OVN. Requires OVN version 20.06 or higher.

  • Routed provider networks

    Allows for multiple localnet ports to be attached to a single Logical Switch entry. This work also assumes that only a single localnet port (of the same Logical Switch) is actually mapped to a given hypervisor. Requires OVN version 20.06 or higher.

The following Neutron API extensions are supported with OVN:

Extension Name

Extension Alias

Allowed Address Pairs

allowed-address-pairs

Auto Allocated Topology Services

auto-allocated-topology

Availability Zone

availability_zone

Default Subnetpools

default-subnetpools

Domain Name System (DNS)

dns_integration

Multi Provider Network

multi-provider

Network IP Availability

network-ip-availability

Network Segment

segment

Neutron external network

external-net

Neutron Extra DHCP opts

extra_dhcp_opt

Neutron Extra Route

extraroute

Neutron L3 external gateway

ext-gw-mode

Neutron L3 Router

router

Network MTU

net-mtu

Packet Logging

logging

Port Binding

binding

Port Forwarding

port_forwarding

Port Security

port-security

Provider Network

provider

Quality of Service

qos

Quota management support

quotas

RBAC Policies

rbac-policies

Resource revision numbers

standard-attr-revisions

security-group

security-group

standard-attr-description

standard-attr-description

Subnet Allocation

subnet_allocation

Tag support

standard-attr-tag

Time Stamp Fields

standard-attr-timestamp