3.2. IPv6 Gap Analysis with Open Daylight Oxygen

This section provides users with IPv6 gap analysis regarding feature requirement with Open Daylight Oxygen Official Release. The following table lists the use cases / feature requirements of VIM-agnostic IPv6 functionality, including infrastructure layer and VNF (VM) layer, and its gap analysis with Open Daylight Oxygen Official Release.

Open Daylight Oxygen Status

In Open Daylight Oxygen official release, the legacy Old Netvirt identified by feature odl-ovsdb-openstack is deprecated and no longer supported. The New Netvirt identified by feature odl-netvirt-openstack is used.

Two new features are supported in Open Daylight Oxygen official release:

  • “IPv6 L3VPN Dual Stack with Single router” [3]
  • “IPv6 Inter Data Center using L3VPNs” [4]
Use Case / Requirement Supported in ODL Oxygen Notes
REST API support for IPv6 subnet creation in ODL Yes

Yes, it is possible to create IPv6 subnets in ODL using Neutron REST API.

For a network which has both IPv4 and IPv6 subnets, ODL mechanism driver will send the port information which includes IPv4/v6 addresses to ODL Neutron northbound API. When port information is queried, it displays IPv4 and IPv6 addresses.

IPv6 Router support in ODL:

  1. Communication between VMs on same network
 Yes  

IPv6 Router support in ODL:

  1. Communication between VMs on different networks connected to the same router (east-west)
 Yes  

IPv6 Router support in ODL:

  1. External routing (north-south)
 NO This feature is targeted for Flourine Release. In ODL Oxygen Release, RFE “IPv6 Inter-DC L3 North-South Connectivity Using L3VPN Provider Network Types” Spec [1] is merged. But the code patch has not been merged yet. On the other hand, “IPv6 Cluster Support” is available in Oxygen Release [2]. Basically, existing IPv6 features were enhanced to work in a three node ODL Clustered Setup.

IPAM: Support for IPv6 Address assignment modes.

  1. SLAAC
  2. DHCPv6 Stateless
  3. DHCPv6 Stateful
 Yes ODL IPv6 Router supports all the IPv6 Address assignment modes along with Neutron DHCP Agent.
When using ODL for L2 forwarding/tunneling, it is compatible with IPv6. Yes  
Full support for IPv6 matching (i.e. IPv6, ICMPv6, TCP, UDP) in security groups. Ability to control and manage all IPv6 security group capabilities via Neutron/Nova API (REST and CLI) as well as via Horizon Yes  
Shared Networks support Yes  
IPv6 external L2 VLAN directly attached to a VM. Yes Targeted for Flourine Release
ODL on an IPv6 only Infrastructure. Yes Deploying OpenStack with ODL on an IPv6 only infrastructure where the API endpoints are all IPv6 addresses.
VxLAN Tunnels with IPv6 Endpoints Yes  
IPv6 L3VPN Dual Stack with Single router Yes Refer to “Dual Stack VM support in OpenDaylight” Spec [3].
IPv6 Inter Data Center using L3VPNs Yes Refer to “IPv6 Inter-DC L3 North-South connectivity using L3VPN provider network types” Spec [4].
[1]https://docs.opendaylight.org/projects/netvirt/en/stable-fluorine/specs/oxygen/ipv6-interdc-l3vpn.html
[2]http://git.opendaylight.org/gerrit/#/c/66707/
[3](1, 2) https://docs.opendaylight.org/projects/netvirt/en/stable-oxygen/specs/l3vpn-dual-stack-vms.html
[4](1, 2) https://docs.opendaylight.org/projects/netvirt/en/stable-oxygen/specs/ipv6-interdc-l3vpn.html