huo control plane tmpls zte rev3

8/8/2019 Huo Control Plane TMPLS ZTE Rev3

1/23

T-MPLS Control Plane

David Huo

Feng GaoZTE Corporation

2008/ 05


2/23

Agenda

Features

Requirements

Open issues

Standard evolution


3/23

Transport-MPLS

T-MPLS is one of the PTN technologies based on CO-PS

T-MPLS=MPLS + OAM L3 Complexity

Packet-based

Low TCO

Survivability

Connection

oriented

Enhanced OAM

Multiple services

support

PTN


4/23

Struc ture of T-MPLS Network

PE PE

P

P

P

DCN

Management Plane

Forwarding Plane

ControlNode

ControlNode

ControlNodeControl

Node

ControlNode

Control Plane

LSP

Client A Client Z


5/23

Control Plane

Functionalities

Signaling

Routing

Discovery

Foundation

Protocol: GMPLS

Architec ture: ASON (G.8080)

Benefits

Multi-vendor compatib ility (E-NNI)

Automatic Provisioning Automatic and effic ient protec tion/ restoration

(resources sharing, multip le faults survivability)


6/23

Agenda

Features

Requirements

Open issues

Standard evolution


7/23

CS vs PS: Cha rac teristic Differenc e

CS PS

channel rig id flexib le

label physic al log ica l

traffic predic table statistica l

bandwidth symmetrical asymmetrical

connection QoS assured need control

service simple diverse


8/23

Basic requirements of CP

Independent of forwarding plane and managementplane

Addresses hiding and independenc e, addresses

mapping or translating Call and c onnec tion control Permanent connec tion, soft permanent connec tion and

switched connec tion

Connec tion management and maintenanc e, inc ludingestab lishment, modification and release Control domain partitioning and inter-domain operation Constra int-based route calculation LSP QoScontrol Link d iscovery and management Survivability, inc luding protec tion and restoration

Management of c ontrol p lane


9/23

G.8080: CP Arc hitec ture

NCC

CC

LRM

RC

TAP DA

PC

DA: Discovery agent

LRM: Link resource mgmt

TAP: Termination&Adaptation

PC: Protocol controller

RC: Route controller

CC: Connection controllerNCC: Network call controller


10/23

Network Model

Client A

Client Z

PE PE

PE PE PE

PE

PE

PE

PE

Provider A Provider B

Domain X

Domain Z

Domain Y

UNI

UNI

E-NNI E-NNI

E-NNI

E-NNI

I-NNI

I-NNI

I-NNI I-NNI

NCCb NCCd NCCg NCCh NCCr NCCtCCCa CCCz

CCa CCzCCb CCdCCc CCg CCh CCr CCs CCt

B

C

D G HR

ST

Call Signaling

Connection Signaling


11/23

Agenda

Features

Requirements

Open issues

Standard evolution


12/23

Resourc es Management

VSCircuit Switch Packet Switch

Rigid channels Flexible channels

Require mapping log ical label to corresponding bandwidths

Connec tions bandwidth tends to be dynamic Connec tion admission c ontrol is required for the c lient

accesses Connec tions can be more than in c irc uit switch network

Bandwidth management become more complex


13/23

Bi-d irec tiona l Asymmetric LSP

PE

PE

Client AClient Z

B

CE

G

D F

Bi-d irec tiona l LSP is congruent and ca n be asymmetric

Signaling extension is needed

Resources alloc ation and management bec ome challenging


14/23

Nested LSP

PE

Client A Client ZB

D E

Nested LSP improves the scalab ility IETF RFC4206, LSP hierarc hy with GMPLS TE Protec tion/ restoration of nested LSP is cha lleng ing

C

F G

PE

PE

PE

H J Client YClient X

I

LSP 1 FHLSP 2 BILSP 3 CJ


15/23

Link Disc overy and Fault Management

Link d iscovery is useful, regardless of thecontrol plane

Functions Auto-d iscovery link connec tions be tween nodes Reduce manual configuration and reduce

possibility unexpec ted errors in configuration Exposing misconnec tions

LMP is an option for the implemen-tation of linkdisc overy and manage-ment of T-MPLS

IETF LMP Control channel management Link p rop erty correlation

Link c onnec tivity verification, Fault management

Discovery mec hanism c an also be achieved inforwarding plane by using OAM

Node A Node B

LMP A LMP B

Link

Test Message

LMP Message


16/23

T-MPLS Survivab ility

Protection 1:1 protec tion

1+1protection

Ring protec tion

Restoration Hard/ soft rerouting

Pre-c omputation/ dynamic restoration

Issues Triggers to initiate rec overy ac tion

Segment protec tion/ restoration vs. E2Eprotec tion/ restoration

Different leve l of survivability depend ing on GoS


17/23

Servic es support

A1 A2

A3

I J K

M

L

N

O

P

E-Line P2P LSP

E-TREE P2MP LSP signaling

Route optimization

Protec tion/ Restoration Require enhancement to

ASON/ GMPLS approach

A1 A2

A3

I J K

M

L

N

O

P

E-LAN No MP2MP LSP signa ling

Multip le P2P LSPs simula tion

A1 A2

A3

I J K

M

L

N

OP


18/23

Multilayer Interc onnec tivity

Client Client

IP/MPLS network

T-MPLS network

OTN network

T-MPLS

Control PlaneOTN

Control Plane

IP/MPLS

Control Plane

T-MPLS network

Unified Control Plane

Signaling interworking TE-links flooding and abstrac tion Route c omputation, PCE Multilayer survivability

Peer or overlay Still many open issues


19/23

Agenda

Features

Requirements

Open issues

Standard evolution


20/23

ITU-T

Requirements &Architecture

G.8080

(G.807)

G.8080 Amd.1 G.8081 Terms &Definitions

G.7712 G.7713

G.7713.1

G.7713.2

G.7713.3

G.7714.1 G.7715.1

G.7716 G.7718

G.7718.1

G.7714 G.7715

G.7715.2

Call & ConnectionManagement

AutoDiscovery

Routing Framework forManagement

CP initialization,Reconfiguration

and Recovery

DCN

PNNI

RSVP-TE

CR-LDP


21/23

IETF

RFC 3945GMPLS

Architecture

RFC 3471GMPLS Signaling

Functional Description

RFC 4139GMPLS Signaling

Extensions for ASON

RFC 4202Routing Extensionsfor GMPLS

RFC 4204LMP

RFC 4426GMPLS Recovery

Functional Specification

RFC 3472CR-LDP Extensions

RFC 3473RSVP-TE Extensions

RFC 4203OSPF Extensions

RFC 4207SDH LMP Test Message

RFC 4209DWDM LMP

RFC 4428Analysis of GMPLS

Recovery Mechanism

RFC 4258GMPLS Routing for ASON

Signaling

Routing

LMP

Survivability

ASONExtensions

GMPLS MIB RFCsManagement


22/23

Sta nd ard Evo lution

Evolution of T-MPLS c ontrol p lane

ITU-T + IETF + OIF

ITU-T foc us on

Requirements, arc hitec ture and func tionalities

IETF foc us on

Design and extension of control protoc ols, such as

signaling , routing and LMP protoc ols

Clarification and solution of some spec ific problems ofCP

OIF focus on UNI,E-NNI


23/23

The End

Thanks !

huo control plane tmpls zte rev3

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