GRUPPO TELECOM ITALIA Politecnico di Torino, 15 January 2008 | C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. Morro| 0 ASON/GMPLS network evolution: the NOBEL project vision This seminar is based on results of the NOBEL phase 2 project, funded by the European Commission in the 6th Framework Programme
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GRUPPO TELECOM ITALIA
Politecnico di Torino, 15 January 2008
| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. Morro|
0
ASON/GMPLS network evolution: the NOBEL project visionThis seminar is based on results of the NOBEL phase 2 project, funded by the European Commission in the 6th Framework Programme
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
OutlineEvolution of core networks: the “IP over Optics” concept
Driver for the evolution of backbone networks
The “delayering” concept
The “IP over Optics” architecture
Next generation optical networks based on ASON/GMPLS control plane
Requirements for the evolution of Optical Networks
The Optical control Plane
The Peer-to-peer and the Overlay models
Functions and interfaces
An example of “Bandwidth on Demand” service
Signaling protocols
Standardization and research activities
OIF interoperability demonstrations
The NOBEL phase 2 project
The MUPBED project
GRUPPO TELECOM ITALIA
Politecnico di Torino, 15 January 2008
| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. Morro|
2
Evolution of core networks: the “IP over Optics” concept
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Summary
Driver for the evolution of backbone networks
The “delayering” concept
The “IP over Optics” architecture
Evolution of core networks: the “IP over Optics” concept
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
The old telecommunications market
TLC market dominated by traditional voice services (POTS) and low rate leased lines
Low level of competition
Low bandwidth requirements
Simple traffic forecasts
High revenues
Evolution of core networks: the “IP over Optics” concept
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
The new telecommunications market
Fast growth of broadband services (fast internet access, contentdistribution, ...)
Higher level of competition
High bandwidth requirements
Difficult traffic forecasts
Lower revenues for new services
Evolution of core networks: the “IP over Optics” concept
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Traffic evolution on the backbone
2001200019991998
Voice
Data
50
100
150
200
250Total traffic(normalized values)
Source: Cisco
Evolution of core networks: the “IP over Optics” concept
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
The role of IP
Internet Protocol was created for the transport of data between computers
Due to the broad diffusion of Internet it is now available on any computer directly integrated in the Operating System
It is now considered the protocol for the integration of different services on a single network infrastructure (Internet access, VoIP, IPTV, ...)
Evolution of core networks: the “IP over Optics” concept
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Fast traffic growth
Use of IP as the protocol for the integration of different services on the same transport network
Difficulty in traffic forecasts
Reduction of operator revenues due to competition and new business models
Large amounts of bandwidth at a low cost
New services to differentiate from competitors
New networks with improved scalability and flexibility
Market trends and operator needs
Evolution of core networks: the “IP over Optics” concept
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Evolution of Network Layering
SDH
ATM
IP
1998
WDM
SDH
IP + MPLS
2004
SDH / WDM
IP + MPLS
2006
SDH
ATM/FR
1996
WDM
SDH
ATM
IP
2000
Delayering
Evolution of core networks: the “IP over Optics” concept
SDH / OTN
IP + MPLS
2008
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
The “IP over optics” architecture
IP/MPLS Layer
Optical/SDHLayer
Physical links(WDM line systems)
Logical links
LSR(Label Switch Router)
ODXC(Optical/Digital Cross Connect)
Evolution of core networks: the “IP over Optics” concept
GRUPPO TELECOM ITALIA
Politecnico di Torino, 15 January 2008
| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. Morro|
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Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Summary
Requirements for the evolution of Optical Networks
The Optical control Plane
The Peer-to-peer and the Overlay models
Functions and interfaces
An example of “Bandwidth on Demand” service
Signaling protocols
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Fast traffic growth
Use of IP as the protocol for the integration of different services on the same transport network
Difficulty in traffic forecasts
Reduction of operator revenues due to competition and new business models
Large amounts of bandwidth at a low cost
New services to differentiate from competitors
New networks with improved scalability and flexibility
Market trends and operator needs
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
New requirements for the Optical Layer
Network scalability and flexibility
Transparent transport of different client signals (SDH, ATM, IP, …) but optimised transport of IP
Fast and automatic end-to-end provisioning of optical channels
Fast and efficient rerouting of connections in case of failure
Dynamic set-up of new connections based on a client/customer request It enables Bandwidth On Demand services
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Meshed architecture preferred for its flexibility and scalability
Fast automatic routing and rerouting requires a certain level of “intelligence” in the optical network Intelligent network vs. stupid network
Signalling between the nodes of the optical network (NNI) for coordinating different actions
Signalling between the client equipment (for example routers) and the optical network for connection set-up requests (UNI)
Re-use of protocols derived from the “IP-MPLS world” to cut development costs and to simplify interworking between layers
Intelligent Optical Networks based on ASON/GMPLS control plane
Impact on network architectures
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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The Optical Control Plane
Control plane(distributed intelligence)
Control plane(distributed intelligence)
X
ManagementSystem
Bandwidthrequest or release fromclients
Network failureMain Control Plane functions• Automatic Topology discovery (Plug-and-play operation) • Automatic Routing• Signaling for automatic set-up e tear-down of connections
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
The MPLS concept:separation of routing and forwarding
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Application of MPLS concept toOptical Networks
Optical network
OXC
OXC OXC OXC
OXC
OXCOXC
OXC
LabelSwitchedPath
LambdaSwitchedPath
Edge OXC
Mapping of Label Switched Pathon wavelength(Lambda Switched Path)
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
GMPLS control planeLabel Switching Routers (LSR) with different types of interfaces
Packet Switch Capable (PSC)
Layer-2 Switch Capable (L2SC)
TimeDivision Multiplexing Switch Cap. (TDM)
Lambda Switch Capable (LSC)
Fiber Switch Capable (FSC)
MPLSMPLSGMPLSGMPLS
Clear distinction between control plane and forwarding plane
Extension and/or modification of existing and well known signaling (RSVP-TE) and routing (OSPF, IS-IS) protocols
Introduction of a new protocol (LMP, Link Management Protocol) for link control between adjacent nodes, fault detection and localization
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
LSP hierarchyLSP1 LSP2 LSP3 LSP4 LSP5
Fibre network: FSC interfaces
IP network: PSC interfaces
SDH network: TDM interfaces
WDM network: LSC interfaces
Layer-2 network: L2C interfaces
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Peer-to-peer model
No Distinction Between UNI, NNI
Routers control end-to-end path selection
Significant amount of state and control information flows between the IP and optical layer
OXC
Optical Network
OXCOXC
OXC OXC
OXC OXCOXC
OXC
OXC
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Overlay model
Client server approach between optical layer and edge network elements
Optical User Network Interface (UNI) exports the service interfaces
Routing information may or may not be exchanged
Optical Network
OXCOXC
OXC
OXCOXC
OXC
OXC
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
ONE A ONE CONE B
CP A CP B CP C
Transport plane
Control plane
Management plane
UNI data
E-NNI control
NMS
Router Client A Router Client B
UNI: User to Network InterfaceI-NNI: Internal Network to Network InterfaceE-NNI: External Network to Network Interface NMI-A: Network Management Interface for the ASON Control PlaneNMI-T: Network Management Interface for the Transport Network
ASON architecture and interfaces
CCI CCI CCI
NMI-A NMI-T
E-NNI data
UNI control
UNI data
UNI control
I-NNI control
I-NNI data
CCI: Connection Control InterfaceONE: Optical Network ElementCP: Control PlaneNMS: Network Management System
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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ASON connection types
ManagementPlane
Permanent Connection
Provisioning RequestsControlPlane
Soft-Permanent Connection
Connection Request
NNI NNI
Set-up Requests
ManagementPlane
ControlPlane
Switched Connection
Connection Request
UNI
NNI NNI
Set-up Requests
Connection Request
UNI
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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UNI User to Network InterfaceE-NNI External Network Node InterfaceI-NNI Internal Network Node InterfaceONE Optical Network Element
Source: OIF
Signaling Interfaces
Next generation optical networks based on ASON/GMPLS control plane
AdministrativeDomain
AdministrativeDomain
UNI
E-NNI
I-NNI
UNI
Client
Client
ONE
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Today, in the transport network…
Node C
Node A
Transport network
Node B
A-B bandwidthis not sufficient
…when traffic grows…We need more
bandwidth
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Node C
Node A
Transport network
Node B
…the customer contacts the provider...
A customer’s request…
FAX:Connect portsAn and Bm...
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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…the job order moves on...
Node A
Transport network
Node B
JOB ORDER:Connects portsAn and Bm...
Node C
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Node A
Transport network
Node B
Which route?…the operator looks for a route...
Node A
Node B
Node C
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Node A
…a route is found...…the network is re-configured
Node B
Node C
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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There is a signallingbetween network elements
In an “intelligent” transport network…
Each element knows the status of the whole network
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Node C
Node A
Transport network
Node B
…when traffic grows…
A-B bandwidthis not sufficient
More bandwidth is required
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Connection setup request (A,2,B,4,...)
Node A
Transport network
Node B
…a new connection with more capacity is requested…
Node C
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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The contacted network element finds a route to the destination...
Node A Node B
Connection setup request (W,i,X,j,Y,k,Z,l,...)
…the connection setup procedure is activated…
…and sends the connection setup request Node C
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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The resource availability is confirmed
Node A Node B
Setup acknowledgment (W,i,X,j,Y,k,Z,l,...)
…the requested connection is created
…all the equipment are configured and the connection is setup Node C
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Intelligent Transport Networks are based on...A distributed Control Plane
Signalingprotocols for
dynamic setup and teardown of connections
Discoveryprotocols for
automatic serviceand neighbour
awarenessRouting protocols
for automaticrouting
Extensions of protocols already in use in IP/MPLS networks(RSVP-TE, OSPF-TE) + a new protocol (LMP)
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Labels and control channel in GMPLS networks
In a MPLS network the label is only an identifier (an header attached to an IP packet or a field in a frame/cell)
In a GMPLS network the label can be associated to a physical entity (time slot, wavelenght, fibre)
In a MPLS network the control channel used to connect the control plane of the different equipment (routing, label distribution etc.) is the same used by the transport plane
In a GMPLS network the control channel can be different from the transport plane
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Link BundlingIn a MPLS network each node keeps in the "link state database" the information about all the adjacent nodes and the link connected to them, that are needed for the routing protocols
Typically, a pair of adjacent nodes are connected by only one link
In a GMPLS network the number of links between two adjacent nodes can be very high
the link state database becomes very large
problems with the management of the database
problems with the scalability of routing protocols
The parallel links between a pair of adjacent nodes are grouped in a single abstract entity, called “bundled link”
The link state database includes only information about the bundled links because the routing protocols do not need information about all the parallel physical links
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Unnumbered link
In a MPLS network an IP address is assigned to each LSR port
The high number of link in a GMPLS network introduces the following problems
High number of IP addresses needed (especially if IPv4 is used)
Complexity in the address management and node configuration
The concept of "unnumbered link" is introduced
Each node is identified by a parameter called “router ID”
All the link connected to a given node are identified by a localparameter called “link number”
Each link in the network is identified by the pair<router ID, link number>
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Basics of IP RoutingIP routing protocol
Exchange of information between IP routers that allow them to determine how to forward IP packets
There are different types of routing protocols
Distance Vector (RIP, IGRP)
Path Vector (BGP)
Link State (OSPF, IS-IS)
Link State Routing protocols in particular support distribution of network topology as links and nodes
For IP, every router must have exactly the same network topologyinformation (links, nodes, and link wts.)
Every router must run exactly the same path computation algorithm
Failure to insure these last two requirements can result in routing loops and “black holes”
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Data Plane in Transport Networks and classic IP Networks differ
For classic IP, every packet is forwarded based on address translation
For label switching (generalized to TDM or WDM), once a cross connection is made, data flows without needing further path computation
ASON Routing IP Routing and Transport Network Routing
Control Plane
L1 Bearer Topology
G.7715 CompliantProtocol
Cross Connec
tSDH Path
Data Plane
Peer Routing Controllers
Source Route Algorithm
Signaling
SDH Path
TopologyDatabase
OSPF
Control Plane
Data Plane
IP router Peers
Shortest Path Algorithm (Dijkstra)
LSA
Header
IP
IPForwarding
IP ForwardingTable
IP address Next Hop
Transport Routing and Forwarding
IP Routing and Forwarding
Control Plane
L1 Bearer Topology
G.7715 CompliantProtocol
Cross Connec
tSDH Path
Data Plane
Peer Routing Controllers
Source Route Algorithm
Signaling
SDH Path
Control Plane
L1 Bearer Topology
G.7715 CompliantProtocol
Cross Connect
SDH Path
Data Plane
Peer Routing Controllers
Source Route Algorithm
Signaling
SDH Path
TopologyDatabase
OSPF
Control Plane
Data Plane
IP router Peers
Shortest Path Algorithm (Dijkstra)
LSA
Header
IP
Header
IP
IPForwarding
IP ForwardingTable
IP ForwardingTable
IP address Next Hop
Transport Routing and Forwarding
IP Routing and Forwarding
Control Plane
L1 Bearer Topology
G.7715 CompliantProtocol
Cross Connec
tSDH Path
Data Plane
Peer Routing Controllers
Source Route Algorithm
Signaling
SDH Path
Control Plane
L1 Bearer Topology
G.7715 CompliantProtocol
Cross Connec
tSDH Path
Data Plane
Peer Routing Controllers
Source Route Algorithm
Signaling
SDH Path
TopologyDatabase
OSPF
Control Plane
Data Plane
IP router Peers
Shortest Path Algorithm (Dijkstra)
LSA
Header
IP
Header
IP
IPForwarding
IP ForwardingTable
IP ForwardingTable
IP address Next Hop
Transport Routing and Forwarding
IP Routing and Forwarding
Control Plane
L1 Bearer Topology
G.7715 CompliantProtocol
Cross Connec
tSDH Path
Data Plane
Peer Routing Controllers
Source Route Algorithm
Signaling
SDH Path
Control Plane
L1 Bearer Topology
G.7715 CompliantProtocol
Cross Connect
SDH Path
Data Plane
Peer Routing Controllers
Source Route Algorithm
Signaling
SDH Path
TopologyDatabase
OSPF
Control Plane
Data Plane
IP router Peers
Shortest Path Algorithm (Dijkstra)
LSA
Header
IP
Header
IP
IPForwarding
IP ForwardingTable
IP ForwardingTable
IP address Next Hop
Transport Routing and Forwarding
IP Routing and Forwarding
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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ASON RoutingSome differences between IP and Transport Network Routing
Prevented by strict source routingPotential problem any time
the routing table changes
Looping
Data can be forwarded on
existing connections but new connections cannot be created
Data cannot be forwarded
without stable routing database
Forwarding dependency
Path computed only at connection
setup, usually only at the source
Path computed for each packet
at each node
Forwarding process
May be different path computation
algorithms at different nodes
Identical path computation
algorithm at each node
Path computation
Domain-specific: may be distributed
or centralized
Always distributedDistribution of Routing
Protocol Entities
Transport RoutingClassic IP Routing
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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The Link Management Protocol
A new protocol is needed to manage all the new aspects related to adjacent nodes specific of GMPLS networks: the Link Management Protocol (LMP)
Main LMP functions
management of the control channel
check of the status of the physical links (fault management)
correlation between parallel physical links and the corresponding bundled links
Next generation optical networks based on ASON/GMPLS control plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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ASON/GMPLS signaling – an example
Next generation optical networks based on ASON/GMPLS control plane
UNI UNI
GRUPPO TELECOM ITALIA
Politecnico di Torino, 15 January 2008
| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. Morro|
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Standardization and researchactivities
ASON/GMPLS network evolution: the NOBEL project vision – Part 2
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Summary
OIF interoperability demonstrations
The NOBEL phase 2 project
The MUPBED project
Evolution of core networks: the “IP over Optics” concept
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
About the OIFMission: To foster the development and deployment of interoperable products and services for data switching and routing using optical networking technologies
The OIF is the only industry group that brings together professionals from the data and optical worlds
80+ member companies representing the entire industry ecosystem:Carriers and network users
Component and systems vendors
Testing and software companies
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Goal - Evolution towards convergence of requirements & protocols
1999/2000 MPLS: flat “peer” model, data/signaling congruent, IP only, data behavior (e.g., connection tear-down w/o request)
2001: Carrier requirements across IETF, OIF, and ITU-T re need for support of commercial business & operational practices
2003: Evolution of GMPLS signaling protocol, used as normative base for ASON extensions
2004-2006: Ongoing communications among all three SDOs on requirements and protocol work
IETF GMPLS Umbrella
--
ITU-T ASON Umbrella
OIFImplementation
Agreements
OIFImplementation
AgreementsIETF GMPLS Umbrella
--
ITU-T ASON Umbrella
OIFImplementation
Agreements
OIFImplementation
Agreements
OIFImplementation
Agreements
OIFImplementation
Agreements
Standards Development Organizations (SDO) Interaction
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StandardsSpecifications
Interoperability Tests & demonstrations
OIF
Carrier sites
Field trials
Deployment
OIFITU-TIETF
Feedback
OIF performs / organizes the next major step towards implementation interoperability evaluations of prototype implementations:•Prove of concept•Feedback to standardization•Fosters follow up activities
OIF supports close relation of standardization and R&D and early implementations
Interoperability Demos Role in Standards to Deployment
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Interoperability DemonstrationsObjectives / Goals
OIF PerspectiveMember evaluation, validation, proof of concept of current OIF draft specifications & IA for interoperable network solutionsFeedback assessment from multi-vendor testing environment to standardization/specification work
Carrier PerspectiveEarly adoption, evaluation, of interoperability testing results demonstrated in multi-vendor environment.Feedback to vendor community on early implementations and integrations based on practical experiences and lessons learned
Industry PerspectiveShowcase OIF contributions, build market awareness of emerging technologies, services and networking solutions.Public forums (Optical conference & exhibitions) utilized
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OIF Implementation Agreements and Interoperability Demos
OIF Implementation Agreements
UNI 1.0 signalingUNI 1.0r2 signalingE-NNI 1.0 signaling E-NNI 1.0 routing
UNI 2.0 signalingE-NNI 2.0 signaling
2001 2002 2003 2004 2005 2006 2007
OIF Networking Interoperability Demonstrations
Lab Location
Trade Show
New Capabilities
Tested
UNH
SuperComm
Draft UNI 1.0
UNH
OFC
Draft E-NNI signaling and routing
Global – 7 carriers
SuperComm
CP-enabled SONET/ SDH data plane
Ethernet over SONET/SDH data plane-only test (GFP/VCAT/LCAS)
Global – 7 carriers
SuperComm
Draft extensions for control plane-enabled EPL
Data plane-only test of EVPL and ELAN
Global – 7 carriers
ECOC
Pre-IA UNI 2.0 and E-NNI 2.0 signaling
Control plane failure recovery
BW modificationControl plane neighbor
discovery
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
C-11VC-11TU-11Aligning
Mapping
× 1× 1
× 3
× 3× 1
× 1
× 3
× 4
× 7× 7
STM-1 AUG-1 AU-4 VC-4
AU-3 VC-3
C-4
C-3
C-2
C-12
VC-3
VC-2
VC-12
TU-3
TU-2
TU-12
TUG-2
TUG-3
AU-4 Pointer processing
Multiplexing
× 4
× 1× 1STM-16 AUG-16 VC-4-16c
VC-4-4c
×1
× 4
STM-64 AUG-64
× 1× 1
× 4
STM-4C-4-4c
C-4-16c
× 1STM-0
× 1× 1STM-256 VC-4-256c C-4-256c
× 1VC-4-64c C-4-64c
AU-4-256c
AU-4-64c
AU-4-16c
AU-4-4c
AUG-256
AUG-4
× 4
Synchronous Digital Hierarchy (SDH) multiplexing structure
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
VC-4-Xv trail (X* 150Mbit/s max, variable bandwidthVirtual Concatenation Group (VCG)
VariableBit rate
Ute
nte
Ute
nte
VC -4 trail (150 Mbit/s )
C4-
VX
vpa
yloa
dLC
AS
VariableBit rate
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
UNI 1.0 R2UNI 1.0 R2
E-NNI 1.0
SONET/SDH
SONET/SDH
SONET/SDH
SONET/SDH
SONET/SDH SONET/SDH
RouterRouter
OIF Interop 2004 Demonstration
Ethernet/SDH Metro
Ethernet/SDH Metro
IP/ASON Backbone
10 Mbit/s
Protection and recovery demonstration
Dynamic setup of backbone connection
Mapping of Fast Ethernetand Gigabit Ethernet
20 Mbit/s
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Protection and recovery demonstration
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OIF @ ECOC 2007
Next generation optical networks based on ASON/GMPLS control plane
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OIF 2007 Demo Technology and FeaturesEnd-to-end provisioning of dynamic switched Ethernet services
Over multiple, control plane-enabled intelligent optical core networks
Using OIF UNI 2.0 and OIF E-NNI IAs
Featuring:
Ethernet Private Line Service
Control Plane Neighbor Discovery
Non-Disruptive Bandwidth Modification
Control Plane Failure Recovery
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Ethernet Services
The Metro Ethernet Forum (MEF) classifies Ethernet services as E-Line (point to point) and E-LAN (multipoint to multipoint). E-Line can be further divided into:
Ethernet Private Line (EPL), where an Ethernet port has dedicated bandwidth across a provider network (no service multiplexing)Ethernet Virtual Private Line (EVPL), where multiple Ethernet ports share bandwidth across a
provider network (service multiplexing)
OIF UNI 2.0 supports both EPL and EVPL servicesThe demonstration focuses on interoperable on-demand Ethernet Services, offered under the ITU-T Recommendation G.8011.1 EPL model.
Carrier CDomain
OIF UNI OIF E-NNI OIF UNI
Carrier ADomain
Carrier BDomain
OIF E-NNINE NE NE NE NE NE
EthernetClient
EthernetClient
Ethernet EthernetSONET/SDH
Ethernet Virtual Circuit (EVC)
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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OIF Multi-Layer Call Control
Actions are coordinated between call controllers at each layerVCAT treated as a separate layer, to allow control and sequencing of VCG membersTraffic parameters are tailored to each layer
These techniques can be applied to other layers besides Ethernet/VCAT/SONET-SDH
SONET/SDH Layer Call Control
Ethernet Layer Call ControlUNI-N UNI-N UNI-CUNI-C
VCAT Layer Call Control
Carrier CDomain
OIF UNI OIF E-NNI OIF UNI
Carrier ADomain
Carrier BDomain
OIF E-NNINE NE NE NE NE NE
EthernetClient
EthernetClient
Ethernet EthernetSONET/SDH
DEMO
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Control Plane Neighbor Discovery
Discovery is a dynamic exchange of information for links brought into service – replacing manual configuration with automated “plug and play”
In-band overhead bytes (J0) describe local transport and control plane resources
Control plane entity correlates local and remote node information
In-band message formats (such as Layer Adjacency) have been defined in ITU-T.The OIF demo extended this capability with out-of-band messages for exchanging discovered information (a Layer Adjacency Discovery response message)
Discovery was also extended to exchange control plane information, such as identifiers of control plane and transport plane entities, and routing area information
Results of demo should assist future discovery standards development
Out-of-band messages
Out-of-band messages
In-band (J0)
message
In-band (J0)
message
Control Plane
Transport Plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
300 Mbit/s
Set up 300 Mbit/s connection
Non-Disruptive Bandwidth Modification
VCG Members A, B, C
450 Mbit/s
VCG Members A, B
Increase BWto 450 Mbit/s
Ethernet Layer
SONET/SDH Layer
UNI-N UNI-N UNI-CUNI-C
VCAT Layer
Carrier CDomain
OIF UNI OIF E-NNI OIF UNI
Carrier ADomain
Carrier BDomain
OIF E-NNINE NE NE NE NE NE
EthernetClient
EthernetClient
Ethernet EthernetSONET/SDH
Three VC-4 ConnectionsTwo VC-4 Connections
Bandwidth modification adjusts connection capacity to meet elastic demandEnables carrier to “right-size” client Ethernet BW using legacy SONET/SDH networkClients use/billed for only what they needNetwork utilization is optimized
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GRUPPO TELECOM ITALIA
Test scenario for SCN failure recovery
Hello
HelloHello
Hello
Control plane
Data plane
Hello
Hello Hello
Hello
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Test scenario for control plane failure recovery
HelloHello
HelloHello
Control plane
Data plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Test scenario for control plane failure recovery
HelloHello
HelloHello
Control plane
Data plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
GRUPPO TELECOM ITALIA
Status Status
Test scenario for control plane failure recovery
HelloHello
HelloHello
Control plane
Data plane
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| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Summary
OIF interoperability demonstrations
The NOBEL phase 2 project
The MUPBED project
Evolution of core networks: the “IP over Optics” concept
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The NOBEL phase 2 ProjectStarting date: 1 March 2006
Duration: 2 years
Consortium: 32 partnersOperators: BT, Deutsche Telekom, France Telecom, Telecom Italia, Telefonica, Telenor
Universities and Research Centers: ACREO, AGH, BME, Corecom, CTTC, Fraunhofer-HHI, IBBT, ICCS, INFN, Politecnico di Torino, Scuola Superiore S. Anna, UCL, University of Padova, University of Stuttgart, UPC
Next generation optical networks based on ASON/GMPLS control plane
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Main goal
Based on the results of the NOBEL project, the main goal of the Integrated Project NOBEL phase 2 is:
to carry out analysis, feasibility studies and experimental validations of innovative network solutions and technologies forflexible, scalable and reliable optical networks, thus enabling broadband services for all
To assess and demonstrate core and metro network architectures in terms of scalability and end-to-end interoperability through network emulations and experiments
Next generation optical networks based on ASON/GMPLS control plane
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GMPLS TDM
OIF TDM
GMPLS LSC
GMPLS LSC
OIF TDM
OIF TDM
MPLS PSC
GMPLS FSC
OIF TDM
NOBEL2 Test-bedsLocation, Inter-domain interfaces and Switching capability
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NOBEL2 Physical Control Topology: NOBEL2 star-hubrouter
OIF workshops on ASON/GMPLS implementations in test and carrier networks http://www.oiforum.com/public/meetOIW050806.htmlhttp://www.oiforum.com/public/meetOIW073106testbeds.htmlhttp://www.oiforum.com/public/meetOIW101606.html
OIF Documents
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Common Control and Measurement Plane (ccamp) Working GroupInternet-Drafts and Request For Comments (RFC) available at
| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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ITU-T Recommendations Accessibility Information
Go to the publications link and choose download per URL:
http://www.itu.int/publications/EBookshop.html
There is an explicit button from the download publications page where you can register up front for 3 free Recommendations
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Some Key ITU-T ASON RecommendationsFundamental (Protocol-Neutral) Architecture & Requirements
G.8080, Architecture for the automatically switched optical network (ASON), 2006 Revision – to be published imminentlyG.7713, Distributed call and connection management (DCM), 2006 Revision, to be published imminently G.7718, Framework for ASON Management, February ’05G.7714, Generalized automatic discovery for transport entities, August ’05 revisionITU-T G.7715/Y.1706 - Architecture and Requirements for Routing in the Automatic Switched Optical Networks, July 2002ITU-T G.7715.1/Y.1706 - ASON Routing Architecture and requirements for Link State Protocols, Feb. ’04ITU-T G.7712/Y.1703 - Architecture and specification of data communication network*, March ’03ITU-T T G.7716 - Control Plane Initialization, Reconfiguration, and Recovery, target Consent Nov. ‘06
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Optical Networking Standards : A Comprehensive Guide for Professionals ; KhurramKazi; ISBN: 0387240624 (to be published June 2006; see – for example - Chapters 2, 16)
| C. Cavazzoni, A. D’Alessandro, A. Di Giglio, G. Ferraris, R. MorroASON/GMPLS network evolution: the NOBEL project vision
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Some Key ITU-T Functional Modeling Rec.Fundamental Architecture & Equipment
ITU-T Rec. G.803, Architecture of transport networks based on the synchronous digital hierarchy (SDH), March 2003ITU-T Rec. G.805 - Generic functional architecture of transport networks, March 2000ITU-T Rec. G.809 - Functional architecture of connectionless layer networks, March 2003ITU-T Rec. G.872, Architecture of optical transport networks, November 2001ITU-T Rec. G.8010, Architecture of Ethernet Layer Networks, February 2004ITU-T Rec. G.8110, MPLS layer network architecture, January 2005ITU-T G.8110.1, Architecture of Transport MPLS (T-MPLS) Layer Network, publication imminentITU-T G.783, Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks, March 2006ITU-T G.8021, Characteristics of Ethernet transport network equipment functional blocks, G.8121, Characteristics of Transport MPLS (T-MPLS) Equipment Functional Blocks, publication imminentEtc.