FeaturesΒΆ

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 or conventional layer-3 agent. The native implementation supports distributed routing. However, it currently lacks support for floating IP addresses, NAT, and the metadata proxy.

  • DHCP

    Native implementation or conventional DHCP agent. The native implementation supports distributed DHCP. However, it currently lacks IPv6 support and support for the Neutron internal DNS and metadata proxy features.

  • Metadata

    Currently uses conventional metadata agent.

  • DPDK

    OVN and networking-ovn 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.

The following Neutron API extensions are supported with OVN:

Extension Name Extension Alias
agent agent
Address Scopes * address-scope
Allowed Address Pairs allowed-address-pairs
Auto Allocated Topology Services auto-allocated-topology
Availability Zone availability_zone
Default Subnetpools default-subnetpools
DHCP Agent Scheduler ** dhcp_agent_scheduler
Distributed Virtual Router * dvr
DNS Integration * dns-integration
HA Router extension * l3-ha
L3 Agent Scheduler * l3_agent_scheduler
Multi Provider Network multi-provider
Network Availability Zone ** network_availability_zone
Network IP Availability network-ip-availability
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
Port Binding binding
Port Security port-security
Provider Network provider
Quality of Service qos
Quota management support quotas
RBAC Policies rbac-policies
Resource revision numbers revisions
Router Availability Zone * router_availability_zone
security-group security-group
standard-attr-description standard-attr-description
Subnet Allocation subnet_allocation
Tag support tag
Time Stamp Fields timestamp_core

(*) Only applicable when conventional layer-3 agent enabled.

(**) Only applicable when conventional DHCP agent enabled.

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