202fa1f4a2
Add documentation for Routed Provider Networks. Co-Authored-By: Lucas Alvares Gomes <lucasagomes@gmail.com> Closes-Bug: #1865889 Change-Id: Ie9b7ba52b5b9e93480f22d6863038bea23a19123
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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 |