The document discusses the OVSDB plugin project in OpenDaylight, which implements network virtualization and integrates with OpenStack. It allows for multi-tenant networks through isolated flow spaces on a shared datapath. Tunnel endpoints can be located anywhere without physical constraints. The project aims to provide programmable networking as a software-defined service rather than relying on physical infrastructure.

1. NETWORK VIRTUALIZATION IMPLEMENTATION IN
OPENDAYLIGHT BY THE OVSDB PLUGIN PROJECT:
ARCHITECTURE AND OPENSTACK INTEGRATION
Brent Salisbury ! ! ! ! ! ! ! ! ! ! Madhu Venguopal
brent.salisbury@gmail.com ! ! mavenugo@gmail.com ! !!
Red Hat ! ! ! ! ! ! ! ! ! ! ! ! Red Hat!
January 29, 2014

3. OVSDB COUPLED WITH A PROGRAMMABLE
DATAPATH

4. MULTI-TENANT NETWORKS
• Overlapping IP Address Space
• Segment Isolation between tenants
is implemented using flow space on
a common bridge/DPID.
• The value are the services not
plumbingVIDs or subnets.
• For added isolation the the project
can associate a datapath per tenant
rather then sharing a common
DPID.
• Avoid semantic constraints and the
politics of tenant definition.
• Tunnel endpoints have no
requirement from the physical
network other then IP reachability.

5. NETWORKS ARE IN THE WAY OF CLOUD ADOPTION
Pros:
o The SDN value will be services and middlebox eradication.
o Developers can be less concerned with DP resources.
o Implementation is a code drop, not a pallet drop.
o Tunnel End Points can be located anywhere. There are no
geographical constraints. This is Cloud networking if privacy
and data protection are of any concern.
o One of the few, if not the only rational brownfield migration
paths for software abstracted networks currently.
o It’s really software.
Cons:
o No innovation around SLAs.
o Solving QoS/disruptive workloads is hard.
o Integration with orchestration is required to
realize significant benefit.
o Networking needs to avoid reinventing
orchestration but focus on integration.

6. High Level Workflow