Transcript
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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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
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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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