IP Centric Control Plane for

1
THE OMEGA TESTBED
Optical Mesh network for Emerging Gigabit
Applications
Sanjeev Lakshmanan, Dhruvish Shah, Kishore
Gadhiraju, Marco Tacca, Andrea Fumagalli
Optical Networking Advanced Research(OpNeAR) Lab
The University of Texas at Dallas
HARDWARE
FEATURES
MODULES

• The hardware is emulated
• 5 Linux PCs act as controllers, run the software
• 7 Fast Ethernet links to form a Mesh Topology
• An electronic crossbar switch emulates a
  crossconnect and is controlled by a device
  driver
• A delay element provides a configurable delay on
  the ethernet links with a maximum delay of 7.9ms

• Generator RWA traffic generation
• Receiver RSVP Protection switching
• LMP Link Management Protocol for detection of
  link and node failures
• Synchronizer Database synchronization
• Cacher For periodically discarding the old
  packets from the network
• UNI - User to Network Interface for management
  and debugging

• IP Centric Control Plane for
• Survivable WDM Mesh Networks
• Overlay Model with a Distributed Architecture
• Shared Path Protection with Differentiated
  Reliability
• Graphical User Interface

Project is in collaboration with CpQD, Brazil

• Link Management Protocol (LMP) runs between
  adjacent nodes of every link
• Each node sends HELLO messages every 5 ms
• Failure is defined as the loss of 4 consecutive
  HELLO messages(20 ms)
• Recovery is defined as the reception of 100
  consecutive HELLO messages(500 ms)

RSVP
LINK MANAGEMENT PROTOCOL

• A Resource Reservation protocol responsible for
  dynamic end-end lightpath setup and release
• Incoming connection requests enter any node,
  which is then designated as the owner of that
  connection
• The owner node runs the RWA, based on Shortest
  Path routing and Least Loaded Wavelength
  assignment, to find the working and protection
  paths
• The owner node first sets up the working path and
• then reserves resources for the protection path

WORKING PATH SETUP

• It initiates the Reservation procedure by sending
  a LIGHTPATH_CREATE_TRY to the source node
• Each node in the path switches the ports of the
  OXC, and forwards the message to the next node in
  sequence.
• In case of a failure, the node sends a
  LIGHTPATH_CREATE_FAIL to the previous node in
  sequence and this message propagates all the way
  back to the owner node.
• In case of a success on all the nodes in the
  path, the destination node sends a SUCCESS
  message to the source node
• The source node floods the SUCCESS message

LMP
PROTECTION RESOURCES RESERVATION