Agenda
TMPLS rationale
TMPLS features
Scalability & QoS
OAM & Resiliency
Control plane
Implementation for inter-working TMPLS standard status & perspectives TMPLS applications
Metro Ethernet
Mobile backhauling
Core router interconnection Conclusions
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Why a packet transport network?
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ITU-T T-MPLS U IETF MPLS
Bi-directional LSP

Penultimate Hop Popping (PHP) OAM : Y17tor, Y17tom

Merging Protection : G8131 (linear), G8132

Equal Cost Multiple Path (ECMP) (rings)

Control Plane : MPLS Control Plane : clear trend towards

Frames re-ordering both NMS-based and ASON/GMPLS
Maintain frame order
IP/MPLS

Frame Format

Client encapsulation

MPLS stacking T-MPLS

Encapsulation in server

Uni-directional LSP

global or per interface label space

EXP, TTL, Diff-Serv (T-MPLS I pipe only)

Multicasting (T-MPLS alignment on-going)
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TMPLS OAM
OAM primitives  TMPLS Y1711 -Y17tom  
Continuous  On demand  
Integrity  FFD, CV  Loopback  
Connectivity  FFD  Trail Trace (ffs)  
Quality  PM (carried by FFD)  Frame Loss, Frame Delay, FDV  
Remote integrity  BDI  Loopback  
Silencing  FDI  Not applicable  
Standardized Ongoing
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TMPLS protection mechanisms
Protection schemes  TMPLS GMPLS/ASON (ITU G8131 G8132; IETF CCAMP)  
1+1, 1:1, 1:N end2end recovery  Supported with APSDesigned for protection switch in less that 50 ms
1+1, 1:1, 1:N segment recovery  Supported with APSDesigned for protection switch in less that 50 ms
TMPLS Ring Protection  In draft status (G8132)Designed for protection switch in less that 50 ms
Restoration  Supported in GMPLS/ASON
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TMPLS: implementation
Transport and service instances in a transport node An inner node has only “transport instances”
A border node has “service instances” and “transport instances”
Multi-layer transport network
Service Transport
Inner
instance instance
T-switch
Outer
T-switch
Client  CP  p2p, mp2mp  DP technology  CP technology  
PDH, STM  None  p2p  λ  GMPLS (or NM)  
E-line  None  p2p  ODU  GMPLS (or NM)  
E-LAN (8021ad)  STP  mp2mp  SONET, SDH  GMPLS (or NM)  
E-LAN (VPLS-like)  None  mp2mp  TMPLS  GMPLS (or NM)  
MPLS (tunnel)  LDP, RSVP,  mp2mp  Ethernet  STP (NM, GMPLS)  
OSPF, IS-IS
MPLS (PW) (MS)-LDP
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features | February 2007 mp2mp All Rights Reserved ⓒ Alcatel-Lucent 2006, #####
Transport instance service instance possible mix
Transport InstService Inst λ via ODU  Sonet, SDH  TMPLS  Ethernet  
PDH, STM  STM via G709  PDH via G707  CES  CES  
E-line  GFP mapping  GFP mapping  G81101  8021ad  
(G7041)  (G7041)  P8021ah  
E-LAN (8021ad)  PB (with STP)  over GFP  PB (with STP)  over GFP  PB (with STP) over TMPLS  8021ad  
E-LAN  PB (no STP, split horizon)  PB (no STP, split horizon)  PB (no STP, split horizon)  P8021ah  
(VPLS-like)  over GFP  over GFP  over TMPLS  
MPLS (tunnel)  ODU as FA(1) for MPLS CP instance  STS-VT/VC as FA(1) for MPLS CP instance  TMPLS tunnel as FA(1) for MPLS CP inst Pure physical link or 8021q  
MPLS (PW)  NA  NA  PW map over TMPLS tunnel  NA  
FA(1) : Forwarding adjacency; iethe transport pipe is advertised as an adjacency to the MPLS
-
service instance, and thus can be used by the attached MPLS device in order to reach a destination
Transport Network Standard Overview
Connection Oriented (G805)  Generic  
SDH  OTH  T-MPLS  
Network Architecture  G803  G872  G81101  CO G805  
CL G809  
CO+CL Guftan  
UNI & NNI Interface  G707  G709  G8112 (Gmotnni)  --­-
OAM [frame format]  Y17tom (Y1711)  ---­
Equipment  G783  G798  G8121 (Gmplseq)  G806  
Linear Protection  G841  G8731  G8131 (Y1720)  G8081  
Ring Protection  G8732 (frozen)  G8132  G8082 (frozen)  
TMPLS standard status  
Version 1 approved Amend1 (p2mp, extended OAM) to be consented Mar­Jun07  
Version1 approved Am1 (p2mp) to be consented Mar-Jun07  
Y1711 approved Y17tom (extOAM, TC) to be consApr07  
Version1 approved Amend1 (p2mp, protection) to be consented Mar-Jun07  
Y1720 approved G8131 v1 (adaptation to TMPLS) consented  
Amend1 (ring) to be consented Jun07  
Mobile Backhauling Application
CES is used to cross access packet

3G  based areas and is ideally terminated at

Node B  the ingress of the agnostic network

2G BTS  
N x E1  
ATM/IMA
N x E1
TDM
PKTaccess
PKTaccess
network
network
Agnostic networ
Multi-service network
Agnostic network with packet
Mobile
Controller
Centre
evolving to T-MPLS
(TDM, ATM, Ethernet)
FE
BS
MSC
RNC  
N x E1 TDM  PKTaccess network PKTaccess network
2G BTS  3G Node B N x E1 ATM/IMA  BS FE  FE  BS  Migration towards T-MPLS for Qos,
traffic engineering, OAM, protections,
statistical multiplexing under a
common operation paradigm

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Network model for IP Backbone: MPLS routers
PE(P) T-switch
TMPLS
DP: MPLS
CP: MPLS
OAM: MPLS
Protection: MPLS
MPLS tunnel with MPLS label swap
TMPLS path with TMPLS label swap
40 | Transport MPLS rationale & features | February 2007
T-switch PE(P)
DP: MPLS CP: MPLS
DP: TMPLS OAM: MPLS
CP:GMPLS Protection: MPLS
OAM: TMPLS
Protection: TMPLS/GMPLS

TMPLS is an overlay network with respect to MPLS

TMPLS is an overlay network with respect to MPLS

PE-P routers are aware of border T-switch only

PE-P routers are aware of border T-switch only

The interface between a border T-switch and a PE-P

The interface between a border T-switch and a PE-P router is a MPLS interface

Two different MPLS-GMPLS inter-working solutions

Two different MPLS-GMPLS inter-working solutions
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can be defined, “trusted” and “not trusted”
Network model for IP backbone: T-MPLS on routers
PE(P)
T-switch PE(P)T-switch
TMPLS
IP/MPLS
DP: TMPLS
CP:GMPLS
OAM: GMPLS
Protection: GMPLS
MPLS tunnel with MPLS label swap TMPLS circuit with TMPLS label swap
he router allows for end-to-end tr ing
TMPLS implementation in t
he router allows for end-to-end traffic engineering
GMPLS UNI can be used for T-MPLS connection setup
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