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Introduction MPLS Transport Profile (TP) BRKSPG-2023

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Agenda

Where is Ethernet Going?

MPLS-TP Pre-Requisite

MPLS-TP Tunnel (LSP) Provisioning

MPLS-TP Single Segment Pseudo-Wire (PW) Provisioning

MPLS-TP OAM

MPLS-TP Resiliency

IP/MPLS-(TE) & MPLS-TP Interoperability

MPLS-TP Case Studies

MPLS-TP Standards Update

Summary

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Where Is Transport Ethernet Going?

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TDM Transport Packet Data Network

Connection Mode Connection Oriented Connectionless (Except TE)

OAM In-Band OAM Out-of-Band (Except PW, TE)

Protection Switching Data Plane Switching Control Plane Dependency

BW Efficiency Fixed Bandwidth Statistical Multiplexing

Data Rate Granularity Rigid SONET Hierarchy Flexible Data Rate

QoS One Class Only QoS Treatment

Packet Transport

MPLS Transport Profile (TP) Merge Transport and Data Networking

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MPLS Transport Profile (TP) Evolution of SONET/SDH transport networks to packet switching driven by

‒ Growth in packet-based services (L2/L3 VPN, IPTV, VoIP, etc)

‒ Desire for bandwidth/QoS flexibility

New packet transport networks need to retain same operational model

An MPLS transport profile being defined at IETF (in collaboration with ITU-T)

Motivation

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MPLS Transport Profile (TP)

Connection-oriented packet switching model

No modifications to MPLS data plane

No IPv4/v6 needed for packet forwarding

Interoperates/interworks with existing MPLS and pseudowire control and data planes

No LSP merging

LSPs may be point to point (unidirectional, co-routed bidirectional or associated bidirectional)

LSPs may be point to multipoint (unidirectional)

Networks can be created and maintained using static provisioning or a dynamic control plane: LDP for PWs and RSVP-TE (GMPLS) for LSPs

In-band OAM (fate sharing)

Protection options: 1:1, 1+1,1:N, Ring-Protection (Achieve GR-253 detection and switching times)

Network operation equivalent to existing transport networks

Characteristics

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Data Plane – MPLS Forwarding

– Bidirectional P2P and

– Unidirectional P2MP LSPs

– No LSP merging

– No Penultimate hop popping (PHP)

– PW (SS-PW, MS-PW)

Control Plane – NMS provisioning option

– GMPLS control plane option

OAM – In-band OAM channel (GACH)

– Connectivity Check (CC): proactive (ext. BFD)

– Connectivity verification (CV): reactive (ext. LSP Ping)

– Alarm Suppression and Fault Indication with AIS (new tool), RDI (ext. BFD), and Client Fault Indication (CFI)

– Performance monitoring, proactive and reactive (new tools)

Resiliency – Sub-50ms protection switch over without c/p

– 1:1, 1+1, 1:N path protection

– Linear protection

– Ring protection

MPLS Transport Profile (TP) Components

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MPLS Label Switched Path (LSP)

PWE3 Encap

DS1 Service E1 Service

MPLS-TP

Generic Associated Channel (G-Ach) for Inband MPLS-TP OAM

Pseudowire Muxing Function

Circuit Emulation 1588v2

MPLS-TP MPLS-TE over DWDM

Network Identifier MPLS Label

MPLS Label Switched Path (LSP)

PWE3 Encap

Ethernet Service

802.1Q, .1ad

EVC

G-Ach G-Ach

STS-1/Nc SPE VC-3/4 SPE

VT1.5 SPE VC-11/12 DS1 Service

E1 Service

STS-1/Nc SPE VC-3/4 SPE

802.1Q

802.1ad

Ethernet Service

SONET/SDH

VT1.5 Muxed Into STS-1

Ethernet Mapping

Network Identifier STS/VC number

SONET SDH over DWDM

GFP-F/ H

DLC

MPLS Transport Profile (TP) Encapsulation

VT1.5 approximately Equivalent to Pseudowire

STS-N/VC-3/4 approximates an LSP

SATo

P CE

oP

Ach

Ach

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MPLS Transport Profile (TP) SONET/SDH Analogy

MPLS-TP

MPLS -TP over DWDM

MPLS Label Switched Path (LSP)

PWE3 Encap

Ethernet Service

802.1Q, .1ad

EVC

G-Ach

STS-1/Nc SPE VC-3/4 SPE

802.1Q

802.1ad

Ethernet Service

SONET/SDH

Ethernet Mapping

SONET SDH over DWDM

GFP-F/ H

DLC

STS-1 VC-3

STS-1 VC-3

STS-1 VC-3

STS-1 VC-3

1 2 3 192

OC-192 STM-64

192 STS-1/VC-3 @ 51 Mbps Fixed SPE Capped at 10 Gig

LSP LSP LSP LSP

1 2 3 192 10 GigE

192 LSP’s @ 51 Mbps CIR Bandwidth Efficient Service Scalability & Flexibility Statistical Multiplexing

Service Granularity (PW) @ 1 Mbps

Ach

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MPLS-TP OAM MPLS-TP LSP G-ACh Packet Structure

Reserved Length Reserved 0 0 0 1 Version Channel Type

1 13 TC 1

Length TLV Type

Value

G-ACH Message

Associated Channel Header (ACH)

Generic Associated Channel Label (GAL)

ACH TLV Header

ACH TLV (e.g Source, Destination, LSP ID, PW ID)

G-ACh Message

MPLS-TP section defined as link connecting two adjacent T-PE

GAL as label stack

Same ACH structure

For Your Reference

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MPLS-TP OAM MPLS-TP PW G-ACh Packet Structure

Reserved Length Reserved 0 0 0 1 Version Channel Type

1 PW Label TC TTL S LSP Label TC TTL

Length TLV Type

Value

G-ACh Message

Associated Channel Header (ACH)

LSP Shim Header

Pseudowire Shim Header

ACH TLV Header

ACH TLV (e.g Source, Destination, LSP ID, PW ID)

G-ACh Message

Existing VCCV ACH (RFC) Use of GAL not required, but allowed ACH TLV header defines length of ACH TLV list ACH TLVs provide additional context for processing of G-ACH message G-ACH message may not require ACH TLVs

For Your Reference

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MPLS-TP Pre-Requisite

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MPLS-TP Pre-Provisioning

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Step #1: Create a Loopback Address on each node for DCN connectivity & CTC Reachability

Step #1: Create Loopback Address

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MPLS-TP Pre-Provisioning

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Step #2: MPLS-TP Node ID MPLS-TP Global ID

Step #2: Review Node ID & Global ID. Node ID will be prepopulated with Loopback ID. Global ID specifies operators MPLS-TP domain.

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MPLS-TP Pre-Provisioning

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Step #3: Review/Create MPLS-TP BFD Templates The system will pre-provision MPLS-TP LSP BFD templates for 3.3ms / 10ms / 50ms. The system will pre-provision MPLS-TP PW BFD template for 1s

Step #3: Review Pre-Provisioned MPLS-TP BFD Templates

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MPLS-TP Pre-Provisioning

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Step #4: Review/Create Link IDs MPLS-TP use Link Number instead of interface number for tunnel provisioning. The link id also specifics how the physical interface will communicate with the adjacent node. 1) IP-ARP 2) Static ARP 3) IP-Less (Default)

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MPLS-TP Pre-Provisioning

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Step #5: Review/Change MPLS Label Range Allocation. Label 16-4000 are allocated to MPLS-TP and 4001-8000 are allocated to IP/MPLS

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MPLS-TP Tunnel (LSP) Provisioning

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MPLS-TP Data Plane MPLS-TP LSP PUSH / SWAP / POP

MPLS-TP LSP Segment

Access Aggregation

Edge

MPLS-TP Access Aggregation

Edge

PUSH Label 10

Ethernet

PW Label

LSP 10

SWAP Label 10 <-> 10 Ethernet

PW Label

LSP 10

Ethernet

PW Label

LSP 10

SWAP Label 10 <-> 20 Ethernet

PW Label

LSP 20

Ethernet

PW Label

LSP 20

POP Label 20 Ethernet

PW Label

LSP 20

T-PE T-PE T-PE T-PE

Core

AC AC

PW PW PW

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MPLS-TP Tunnel Creation MPLS-TP Tunnel Circuit Creation Wizard

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Step #1: Specify the Tunnel Attributes Admin State: Up/Down Bandwidth: Accounting Protection: Protect/Un-Protect IP Unnumbered: Leverage IP for dynamic setup Note: The PW Class type for the tunnel can automatically be created with the Tunnel

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MPLS-TP Tunnel Creation – Cont’d

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Step #2: Specify the A node the tunnel begins upon Slot: Beginning Slot/Interface for the tunnel Attach BFD: Specify the BFD template (3.3ms/ 10ms / 50ms) Tunnel Number: Unique number Working LSP Number: Pre-Populated Protecting LSP Number: Pre-Populated

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MPLS-TP Tunnel Creation – Cont’d

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Step #3: Specify the Z node the tunnel end in Slot: Beginning Slot/Interface for the tunnel Attach BFD: Specify the BFD template (3.3ms/ 10ms / 50ms) Tunnel Number: Unique number Working LSP Number: Pre-Populated Protecting LSP Number: Pre-Populated

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MPLS-TP Tunnel Creation – Cont’d

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Step #4: Specify Tunnel Routing through the network Node-Diverse Path: • Nodal Diversity Required • Nodal Diversity Desired • Link Diversity Only

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MPLS-TP Tunnel Creation – Cont’d

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Step #5: Specify Working Tunnel & Protect Tunnel. Review pre-calculated Label numbers.

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MPLS-TP Tunnel Modification

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MPLS-TP Tunnel Modification

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MPLS-TP Tunnel Modification

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MPLS-TP Tunnel Modification

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MPLS-TP Data Plane LSP QOS

Committed Info Rate (CIR)

Peak Info Rate (PIR)

100% Rate

RED = DROPPED

YELLOW = LOW PRIORITY

(Dropped in Case of Congestion)

GREEN = TRANSMITTED

Data Rate

0

100

LSP 10

LSP 20

LSP 30

10GE

LSP 10 QoS Policy PIR 3 Gigabit CIR 2 Gigabit

LSP 20 QoS Policy PIR 5 Gigabit CIR 5 Gigabit

LSP 30 QoS Policy PIR 4 Gigabit CIR 3 Gigabit

MPLS-TP LSP QoS Rules 1. The Total number of LSP CIR’s can not exceed port speed 2. All LSP get a guaranteed bandwidth throughout the

network 3. Working and Protect LSP QoS need to be exactly the same 4. LSP EXP Bits Classification used to define priority

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MPLS-TP Single Segment Pseudo-Wire (PW) Provisioning

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PW Segment over MPLS-TP

MPLS-TP Data Plane MPLS-TP Multi-Segment Pseudo-Wire

PW Segment over MPLS-TP

Access Aggregation

Edge

MPLS-TP Access Aggregation

Edge

MPLS-TP

T-PE T-PE S-PE

PW SWAP Label 10 <-> 20 LSP SWAP Label 10 <-> 20

Ethernet

PW 10

LSP 10

Ethernet

PW 20

LSP 20

AC AC

PUSH Label 10

Ethernet

PW 10

LSP 10

POP Label 20

Ethernet

PW 20

LSP 20

Core

PW PW

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MPLS-TP Static PW Template MPLS-TP PW Class

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PW Class is automatically created when the Tunnel is created. The PW Class can be modified once it is created.

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MPLS-TP Static PW Template MPLS-TP PW Circuit Creation Wizard

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Step #1: Specify the PW Attributes PW Name: PW Description: Admin State: Bandwidth: VPN ID: Redundancy:

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MPLS-TP Static PW Template MPLS-TP PW Circuit Creation Wizard

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Step #2: Specify the A node the PW begins upon AC End Point: AC Attributes: PW Attributes: Backup PW Attributes:

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MPLS-TP Static PW Template MPLS-TP PW Circuit Creation Wizard

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Step #3: Specify the Z node the tunnel end in AC End Point: AC Attributes: PW Attributes: Backup PW Attributes:

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MPLS-TP Static PW Template MPLS-TP PW Circuit Creation Wizard

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Step #4: Review PW Circuit Creation.

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MPLS-TP OAM

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Design Guidelines: Reuse/Extend MPLS Tools as Much as Possible, Ensure Interoperability

Continuity Check

Connectivity Check (Path Verification)

Performance Mgmt

Fault Localization

Remote Integrity

Alarm Signal

Extended BFD

Extended BFD

New LM and DM Tools

New Tool - LDI

Extended BFD

New FM Tool – AIS/RDI

Extended LSP Ping

Extended LSP Ping

New LM and DM Tools

Extended LSP Ping

Extended LSP Ping

Not Applicable

BFD to be extended for pro-active CC-CV and RDI LSP Ping to be extended for on-demand CV and TraceRoute

LM: Loss Measurement DM: Delay Measurement FM: Fault Management

On Demand (Reactive) OAM Functions

Continuous (Proactive)

MPLS-TP OAM Ongoing Work

MPLS-TP OAM OAM Function and Tools

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MPLS-TP OAM

MPLS-TP OAM packets needs to follow the same path as the data flows LSPs have no mechanism to differentiate user packets from OAM packets Generic Alert Label (GAL) provides this function

‒ New reserved label - Label 13 ‒ In MPLS-TP GAL always appears at the Bottom of Stack

If a GAL is found anywhere in the label stack it indicates the payload begins with G-ACH Normal MPLS operations apply

‒ MPLS devices only examine the top label in normal operations ‒ MPLS devices inspect the label stack when TTL expires

GAL will be found : ‒ If it’s the popped label ‒ If the TTL expires

LSP OAM Frame Structure

MAC Header Channel Payload L1 GAL/BoS Generic ACH

0001 | Ver | Resv | Channel Type

For Your Reference

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MPLS-TP OAM Associated Channel (A-CH) Processing

MPLS-TP LSP Segment

MEP MIP MIP MEP

AC AC

PW PW PW

0001 | Ver | Resv | Channel Type

MAC Header OAM Message LSP-L PWE-3 ACH PWE-3 L • Pseudo-Wire (PW) OAM in MPLS-TP is exactly the same as PW OAM in IP/MPLS • PW OAM is only processed between MEP’s • PW OAM is defined by the 1st nibble 0001 in the PW control word

LSP-L MAC Header OAM Message GAL GE-ACH

0001 | Ver | Resv | Channel Type

Pseudo-Wire OAM

MPLS-TP LSP OAM

• LSP OAM in-band designated by label 13 • LSP OAM can be processed between MEP’s and MIP’s

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MPLS-TP OAM OAM Architecture

MPLS-TP LSP Segment MPLS-TP LSP Segment

Access Aggregation

Edge

MPLS-TP Access Aggregation

Edge

MPLS-TP

T-PE T-PE S-PE

MEP MEP MEP MIP MIP

Core

MEP MIP MIP LSP OAM LSP OAM

Based on Maintenance Entities Maintenance End Points (MEPs) and Maintenance Intermediate Points (MIPs) Multiple levels

Maintenance Entities Association of two MEPs Zero or more intermediate MIPs MEPs source and sink OAM flow MIPs can only sink or respond to an OAM flow

AC AC

PW PW

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LSP OAN - GAL Label = 13 G-ACH Control Word = 0x01 CC Type = 0x1 Channel Type = 0x1 – MPLS LSP Ping

MAC Header Channel Payload L1 GAL/BoS Generic ACH

0001 | Ver | Resv | CC, LSP-Ping Type

LSP Source

LSP Destination

MEP MEP MIP MIP

LSP MPLS Echo Request

LSP MPLS Echo Reply

MPLS-TP OAM LSP Continuity Verification (CV) LSP-Ping

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MPLS-TP LSP Ping

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LSP Source

LSP Destination

TPE TPE Midpoint LSP - MIP Midpoint LSP - MIP

MEP MEP

TTL=1

TTL=2

TTL=3

LSP OAM - GAL Label = 13 G-ACH Control Word = 0x01 CC Type = 0x1 Channel Type = 0x4 – MPLS LSP Echo Request

MAC Header Channel Payload L1 GAL/BoS Generic ACH

0001 | Ver | Resv | CC, LSP-Ping Type

MPLS-TP OAM LSP Continuity Verification (CV) – Fault Isolation

LSP MPLS Echo Request

LSP MPLS Echo Reply

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MPLS-TP LSP Trace Route

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LSP OAM - GAL Label = 13 G-ACH Control Word = 0x01 CC Type = 0x1 Channel Type = 0x7 – BFD

MAC Header Channel Payload L1 GAL/BoS Generic ACH

0001 | Ver | Resv | CC, BFD

LSP Source

LSP Destination

MEP MEP MIP MIP

BFD Control Packet

BFD Control Packet

MPLS-TP OAM LSP Continuity Check (CC) Bidirectional Forwarding Detection (BFD)

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MPLS-TP OAM

Checks paths continuity between end points (no end point identity verification)

Uses Bidirectional Forwarding Detection (BFD) over G-ACh without IP/UDP headers

BFD operates in asynchronous mode

LSP is UP when BFD session is UP

BFD diagnostics field provides remote defect indication (RDI) function

BFD initiated using slow start (1s interval, multiplier of 3) with poll/final sequence

BFD Initialization

BFD CC (Interval x Multiplier)

BFD CC (Interval x Multiplier) Label

ACH BFD

GAL

Bi-directional, co-routed MPLS-TP LSP

BFD (Down)

BFD (Init) BFD (Up/Poll)

BFD (Up/Final) BFD (Up)

BFD (Up) BFD (Up) BFD (Up)

P TPE TPE P

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MPLS-TP OAM

Failure indication sent by local end point to remote end point

Sent on direction opposite to failure

Uses existing BFD diagnostics field

‒ 0 - No Diagnostic

‒ 1 - Control Detection Time Expired

‒ 3 - Neighbor Signaled Session Down

‒ 4 - Forwarding Plane Reset

‒ 5 - Path Down

‒ 7 - Administratively Down

Diagnostics field indicates reason for last change in session state on an end point

BFD Remote Down Indication (RDI)

Label

ACH BFD

GAL

Bi-directional, co-routed MPLS-TP LSP

BFD (Up / 0) BFD (Up / 0)

P TPE TPE P

Oper Up Oper Up

X

X

BFD (Up / 0) BFD (Up / 0) X BFD (Up / 0) X BFD (Down / 1)

BFD (Down / 3) X BFD (Down / 1) BFD (Init / 3)

BFD (Down / 1) X

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MPLS-TP OAM Pseudowire Maintenance Entity (PME) – VCCV RFC 5085

LSP Source

LSP Destination

TPE TPE Midpoint LSP

Midpoint LSP

CE CE

AC AC

PME

MAC Header LSP Ping Payload L1 PWL/BOS PWE-3 ACH

0001 | Ver=0x0 | Resv=0x0 | Type =0x21 CPT Supports In-Band VCCV Ethernet PW-ACH (IPv4) = 0x21 Ethernet PW-ACH (IPv6) = 0x57 PWE3 Control Word (1st nibbles) = 0x1 Channel Type = 0x21 or 0x57 MPLS LSP Ping Payload

On-Demand Continuity Check Between MEPs and MIPs NMS Retrieval of PW Path to Populate the Global ID of MIPs/MEPs

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MPLS-TP OAM

Static PWs require in-band status notification (no LDP notification)

Existing PW Status TLV sent over G-ACh

Three messages sent at 1 per sec to set/clear fault then continuous messages sent at a longer interval

Native service OAM or port shutdown can propagate failure to remote CE

Static Pseudowire Status Notification

BFD CC (Interval x Multiplier)

BFD CC (Interval x Multiplier) Label

ACH OAM Msg (Status)

Bi-directional, co-routed MPLS-TP LSP

P1 PE1 PE2 P2 CE1 CE2

1 per sec

1 per refresh timer (default 30s)

Static PW Status Static PW Status Static PW Status

Static PW Status

Static PW Status

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MPLS-TP OAM

Function Encapsulation Channel Type

Continuity Check (CC) BFD without IP/UDP headers 0x0007

Connectivity Verification (CV) LSP Ping with IP/UDP headers 0x0021

Route Tracing LSP Ping with IP/UDP headers 0x0021

Lock Reporting (LKR) Fault OAM message 0x0058

Alarm Reporting (LDI/AIS) Fault OAM message 0x0058

Remote Defect Indication (RDI) BFD without IP/UDP headers 0x0007

Client Failure Indication PW OAM message with PW status TLV 0x0022

OAM Message Format

For Your Reference

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MPLS-TP OAM LSP/PW Performance Management

RFC 6374: Packet Loss and Delay Measurement for MPLS Networks

RFC 6375:Packet Loss and Delay Measurement Profile for MPLS-TP

Operate over LSP, PW, and Links

Support unidirectional/bidirectional point-to-point and unidirectional point-to-multipoint measurement

Defines two protocols Loss Measurement (LM)

Delay Measurement (DM)

Runs over the LSP and/or the PW Generic Associated Channel (G-ACh)

Need NTP or PTP Network Timestamps for DM accuracy

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LSP Source

LSP Destination

MEP Querier MEP Responder MIP MIP

L1: LM Query

L2: LM Response

MPLS-TP OAM LSP Loss Measurement (LM)

For LM, each “counterstamp” records the count of packets or octets sent or received over the channel prior to the time this message is sent or received

For LM, loss is measured as a delta between successive messages. For example, a loss measurement in the forward direction is computed as

(Q_TxCount[n] – Q_TxCount[n-1]) – (R_RxCount[n] – R_RxCount[n-1]) Thus LM requires a small amount of state at the querier: it retains the counter values in the

most recently received response

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MPLS-TP OAM

Two different modes of LM are supported: ‒ Direct mode LM computes the actual packet loss of the channel via exchange of data-plane

counters ‒ Inferred mode LM computes the loss of a stream of test messages in order to approximate the

channel loss

Direct LM provides ideal loss accounting, but requires hardware “counterstamping” support in platforms with hardware-based forwarding

Inferred LM only provides an approximate indication of loss, but does not require hardware support

The two modes use different G-ACh Channel Types but function identically at the protocol level

Direct LM works only for MPLS-TP LSPs Inferred LM works in both IP/MPLS/MPLS-TE/MPLS-TP

LSP Loss Measurement (LM)

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Loss Measurement (LM) Message Format

Cisco Confidential — Internal Use Only

Field Meaning Flags Query/Response, TC-specific measurement

Control Code Query type or response code

DFlags Data format flags: Packet/octet count, 32/64 counter mode

OTF Origin Timestamp Format

Origin Timestamp Used for sequencing and throughput measurement

Session Identifier / DS Unique Session ID, Diffserv class

MPLS-TP OAM For Your

Reference

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LSP Source

LSP Destination

MEP Querier MEP Responder MIP MIP

T1: DM Query

T3: DM Response

MPLS-TP OAM

1. The querier begins a measurement session by initiating a stream of query messages at a specific rate

2. Time T1: Query message exits the Querier TX port and is stamped with a time or counter value

3. Time T2: Query message enters the Responder RX port and is time- or counter-stamped

4. Responder inspects and processes the query and generates a response message, which is a copy of the Query with the Response flag set

5. Time T3: Response message exits the Responder TX port and is time- or counter-stamped

6. Time T4: Response message enters the Querier RX port and is time- or counter-stamped

7. Querier now has all four data values and can compute a measurement

LSP Delay Measurement (DM)

T2: DM Query

T4: DM Response

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MPLS-TP OAM

The DM protocol supports measurement of one-way channel delay, two-way channel delay, round-trip delay, and packet delay variation

DM can easily be implemented in software but requires hardware timestamp support for good accuracy

The DM protocol supports multiple timestamp formats (e.g. NTP and PTP)

The PTP 64-bit IEEE 1588 version 1 timestamp format has been chosen as the mandatory default

LSP Delay Measurement (DM)

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MPLS-TP OAM Delay Measurement (DM) Message Format

Cisco Confidential — Internal Use Only

Field Meaning Flags Query/Response, TC-specific measurement

Control Code Query type or response code

QTF/RTF Query/Response Timestamp Format

RPTF Responder’s Preferred Timestamp Format

Session Identifier / DS Unique Session ID, Diffserv class

For Your Reference

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MEP MEP

MEP MEP

MEP MIP MEP MEP MIP MEP

MPLS-TP Pseudowire OAM

MPLS-TP LSP OAM MPLS-TP LSP OAM

MIP MIP

MPLS-TP OAM Overlay Model Ethernet OAM and MPLS-TP OAM

Notes: All E-OAM Sessions Will Transparently Traverse the MPLS-TP Network Domain The E-OAM Session Can Start at the Attachment Circuit When the Services Starts on the MPLS-TP TPE

MEP* MEP* Ethernet OAM

Operator A Operator B CPE CPE

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MPLS-TP Resiliency

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MPLS-TP Resiliency 1:1 LSP Protection

• Working LSP provisioned as Active Path between two TPE’s

• Protect LSP provisioned as Standby Path between two TPE’s

• Active/Standby home in on same node but different interfaces – Network redundancy

• MIP’s are agnostic to Active/Standby Designations • LSP Fault Detection via BFD, LDI, & Manual APS Switching

• In 1:1 Protection the Standby Path is idle until APS

Working LSP Active LSP

Protect LSP Standby LSP

TPE TPE Attachment Circuit

Attachment Circuit

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MPLS-TP Resiliency 1+1 LSP Protection

• Working LSP provisioned as Active Path between two TPE’s

• Protect LSP provisioned as Standby Path between two TPE’s

• Active/Standby home in on same node but different interfaces – Network redundancy

• MIP’s are agnostic to Active/Standby Designations • LSP Fault Detection via BFD, LDI, & Manual APS Switching

• In 1+1 Protection the Standby Path is active and TPE blocks the standby LSP until APS

Working LSP Active LSP

Protect LSP Standby LSP

TPE TPE Attachment Circuit

Attachment Circuit

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MPLS-TP Resiliency BFD Fault Detection

BFD 9ms Detection Example Asychronous (Non-Echo Mode) BFD Timers Desired Min Tx Interval - 3 msec Desired Min Rx Interval - 3 msec Detect Multiple = 3 (# of Frames Dropped Before DN State Is Declared) Detection Time ~10 msec

• Independent BFD Session running on both working and protect LSP • APS switch is triggered with a loss of 3 BFD Control Packets at the MEP/TPE • MPLS-TP BFD Control Packet will have GAL Label, GE-ACH Header

• BFD timers configuration critical for APS detection times

Working LSP BFD Packet Every 3ms

BFD Packet Every 3ms Protect LSP

TPE TPE Attachment Circuit

Attachment Circuit

X Node, Switch Fabric, Line Card Failure

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MPLS-TP Resiliency Link Down Indication (LDI) Fault Detection

• LSP LDI Generated from MIP

• LSP MEP/TPE receives LDI and triggers protection switching

• MPLS-TP LDI Packet will have GAL Label, GE-ACH Header

• LDI is equivalent to SONET/SDH AIS

TPE TPE Attachment Circuit

Attachment Circuit

X Physical Link Failure

Working LSP

Protect LSP

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MPLS-TP Resiliency Alarm Indication Signal (AIS) Alarm Suppression

• LSP AIS Generated from MEP or MIP • AIS is a transient, If persistent BFD will detect failure, IF LDI is disabled or between MPLS-TP domains

• MPLS-TP AIS Packet will have GAL Label, GE-ACH Header

• AIS is transient with no consequent APS actions. This is different from SONET/SDH AIS. MPLS-TP LDI is equivalent to SONET/SDH AIS

TPE TPE Attachment Circuit

Attachment Circuit

X Physical Link Failure

Working LSP

Protect LSP

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MPLS-TP Resiliency System Alarms

Both BFD alarm and LDI alarms are raised for fiber cuts

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IP/MPLS-(TE) & MPLS-TP Interoperability

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PW Segment over MPLS-TP

MPLS Interworking

The MPLS PW works over both MPLS-TP and IP/MPLS-(TE).

The PW OAM Header is replaced with the LDP Header when going from static to dynamic

This enables End to End Service Visibility and Management

Pseudo-Wires Form a Natural Bridge

PW Segment over MPLS-TP PW Segement over MPLS/LDP

Core Access Aggregation

Edge

MPLS-TP IP/MPLS-(TE) Access Aggregation

Edge

MPLS-TP

S -P E

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MPLS Interworking MPLS-TP to MPLS-TE Multi-Segment PW Stitching

Core Access Aggregation

Edge

MPLS-TP IP/MPLS-TE Access Aggregation

Edge

MPLS-TP

serv instance 10 eth encap default Xconnect 7.7.7.7 99 encapsulation mpls manual pw-class pw-static mpls label 61 42 pseudowire-class pw-static encapsulation mpls protocol none preferred-path interface tunnel-tp 1

6.6.6.6/32

l2 vfi PW-SWITCH point-to-point neighbor 6.6.6.6 99 pw-class mpls_static mpls label 42 61 neighbor 9.9.9.9 66 pw-class mpls pseudowire-class mpls_static encapsulation mpls protocol none

7.7.7.7/32

PW Segment over MPLS-TP

service instance 100 ethernet encapsulation default xconnect 7.7.7.7 66 pw class TE pseudowire-class TE encapsulation mpls preferred-path interface Tunnel1

PW Segment over MPLS-TP

9.9.9.9/32

PW Segement over MPLS/LDP

New IGP Label Change VC ID symmetric TTL Decremented by 1 EXP Bits copied L2 Encapsulation

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MPLS Interworking MPLS-TP to MPLS-TP Multi-Segment PW Stitching

Core Access Aggregation

Edge

MPLS-TP Access Aggregation

Edge

MPLS-TP

serv instance 10 eth encap default Xconnect 7.7.7.7 99 encapsulation mpls manual pw-class pw-static mpls label 61 42 pseudowire-class pw-static encapsulation mpls protocol none preferred-path interface tunnel-tp 1

6.6.6.6/32

l2 vfi PW-SWITCH point-to-point neighbor 6.6.6.6 99 pw-class mpls_static mpls label 42 61 neighbor 9.9.9.9 66 pw-class mpls_static mpls label 43 62 pseudowire-class mpls_static encapsulation mpls protocol none

7.7.7.7/32

PW Segment over MPLS-TP

serv instance 10 eth encap default Xconnect 7.7.7.7 66 encapsulation mpls manual pw-class pw-static mpls label 62 43 pseudowire-class pw-static encapsulation mpls protocol none preferred-path interface tunnel-tp 1

PW Segment over MPLS-TP

9.9.9.9/32

PW Segement over MPLS/LDP

New IGP Label Change VC ID symmetric TTL Decremented by 1 EXP Bits copied L2 Encapsulation

MPLS-TP

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MPLS Interworking MPLS-TP to IP/MPLS Multi-Segment PW Stitching

Core Access Aggregation

Edge

MPLS-TP IP/MPLS-TE Access Aggregation

Edge

MPLS-TP

serv instance 10 eth encap default Xconnect 7.7.7.7 99 encapsulation mpls manual pw-class pw-static mpls label 61 42 pseudowire-class pw-static encapsulation mpls protocol none preferred-path interface tunnel-tp 1

6.6.6.6/32

l2 vfi PW-SWITCH point-to-point neighbor 6.6.6.6 99 pw-class mpls_static mpls label 42 61 neighbor 9.9.9.9 66 pw-class mpls pseudowire-class mpls_static encapsulation mpls protocol none

7.7.7.7/32

PW Segment over MPLS-TP

service instance 100 ethernet encapsulation default xconnect 7.7.7.7 66 encap mpls

PW Segment over MPLS-TP

9.9.9.9/32

PW Segement over MPLS/LDP

New IGP Label Change VC ID symmetric TTL Decremented by 1 EXP Bits copied L2 Encapsulation

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PW Segment over MPLS-TP

MPLS Interworking MPLS-TP/MPLS-TE Interoperability

PW Segment over MPLS-TP PW Segement over MPLS/LDP

Core Access Aggregation Edge MPLS-TP IPMPLS-TE/MPLS-TP

Access Aggregation Edge MPLS-TP

MPLS-TP MPLS-TP MPLS-TP

mpls label range 4001 8000 static 16 4000 mpls ldp graceful-restart mpls traffic-eng tunnels no mpls traffic-eng auto-bw timers mpls tp router-id 10.10.10.3 fault-oam refresh-timer 1 wtr-timer 30 ! bfd-template single-hop LSP_BFD_04

interval min-tx 4 min-rx 4 multiplier 3 pseudowire-class PW_TP_13_VPWS encapsulation mpls control-word protocol none preferred-path interface Tunnel-tp13 ! pseudowire-class PW_TE_45_VPWS encapsulation mpls control-word protocol none preferred-path interface Tunnel45

interface TenGigabitEthernet5/3 ip address 10.10.2.3 255.255.255.0 carrier-delay msec 200 mpls ip mpls tp link 1 ipv4 10.10.2.2 no keepalive transport-mode otn bit-transparent opu2e soak link notification 10 ip rsvp bandwidth 10000000 ip rsvp signalling hello graceful-restart l2protocol peer cdp lacp l2protocol forward stp vtp dtp pagp dot1

interface Tunnel-tp13 description Node 1 to Node 3 ip unnumbered Loopback0 logging event link-status no keepalive tp bandwidth 1000000 tp source 10.10.10.3 tp destination 10.10.10.1 bfd LSP_BFD_04 working-lsp out-label 18 out-link 2 in-label 18 lsp-number 0 protect-lsp out-label 19 out-link 1 in-label 19 lsp-number 1 soak link notification 10

interface Tunnel45 ip unnumbered Loopback0 logging event link-status tunnel mode mpls traffic-eng tunnel destination 10.10.10.1 tunnel mpls traffic-eng priority 1 1 tunnel mpls traffic-eng path-option 1 dynamic tunnel mpls traffic-eng path-selection metric igp soak link notification 10

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MPLS Interworking MPLS-TP/MPLS-TE Interoperability

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MPLS Interworking MPLS-TP/MPLS-TE Interoperability

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MPLS-TP Case Studies

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Asia Pacific PTT POTS Use Case Tier 1

MPLS-TP L1 Lease Line

GE, 10GE, E1, E3

Business Driver

• Growth in Ethernet Lease Line Services, Consolidate Fiber, & Leasing CO Co-location space for out of market services.

Cisco Solution and Value Proposition:

• Single Product line with Standards Based MPLS-TP.

• Industry leading Space and Power Footprint / High Density GE with Unique Satellite Architecture / 24x10GE Density

• Only Transport Solution that Provides 4:1 Service Protection. MPLS-TP LSP Protection with MPLS-TP PW Redundancy

• Lease Line & Lease LAN Service Flexibility. Sub-Rate GE, Line-Rate GE, & Sub-Rate 10GE

Enterprise

L1 Lease Line

GE, 10GE, E1, E3

Submarine cable

Submarine cable

Enterprise

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POTS Use Case Tier 2 US

Customer L1/L2

Internal NNI L1

External NNI L1

CSS

Customer L3

CPT 600

ETN

IP//MPLS Backbone

MPLS-TP IP/MPLS

ETN: Ethernet Transport Network CSS: Converged Service Switch L1: Ethernet Lease Line L2: Ethernet Private LAN L3: Layer 3 VPN / Internet

ASR 9010

EVC

Business Driver • Growth in Ethernet Services leads to Packet Transport migration

Cisco Solution and Value Solution:

• CPT Provides compact, scalable and pay as your grow architecture

• Strict transport SLAs for L1/L2 services with MPLS-TP

• Unified MPLS w/ CPT & PW Head-End on ASR9K Simplifies Network Design and Enables L3 Services in ETN

Cisco differentiation Unified MPLS approach with common management and standards based MPLS-TP Solution

PW Head-End Support

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POTS Use Case Tier 1 Japan IP Core

Backbone

2G/3G/4G Node

Mobile Core Backbone

2G/3G/4G Node

DSLAM

Ethernet

Ethernet

Access Node

Minor Ring

Minor Ring

Major Ring

Service Router

MPLS-TP IP/MPLS EVC

CPT 600

CPT 600

ASR 9010

Business Driver:

- Converge Enterprise, Band and Mobile backhaul to a Single Unified Packet Transport Network Architecture.

- Strict Packet Transport Requirements: (Depth, Height, Width, Power, & Static Provisioning

Cisco Solution and Value Proposition:

- CPT, ASR 903, & ASR9K Provide E2E Network Architecture

- Advanced and Industry leading MPLS-TP Features and Functionality

Cisco differentiation - Standards based MPLS-TP, Advanced capabilities such as multipoint and Video broadcast on MPLS-TP

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North America Railway Use Case Tier 1

CPT /w Integrated MSTP

MPLS-TP IP/MPLS

ASR9K

Business Driver

• Provide Packet Services across Train Control Network. (>6,000km fiber network)

Cisco Solution and Value Proposition:

• CPT Provides an integrated DWDM & MPLS-TP solution to meet space constraints for trackside nodes.

• Strict Transport SLAs for Train Control and VOIP Services with MPLS-TP.

• Unified MPLS with ASR9K & CPT Provides Service Flexibility and Network Availability.

ASR9K

IP/MPLS

IP Core Backbone

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European PTT POTS Use Case Tier 1

Enterprise A

CPT 600 /w Integrated MSTP

MPLS-TP L1 Lease Line

GE, 10GE, E1, E3

Business Driver

• Growth in Ethernet Lease Line Services, Consolidate Fiber, & Leasing CO Co-location space for out of market services.

Cisco Solution and Value Proposition:

• Single Product line with Standards Based MPLS-TP and integrated DWDM.

• Industry leading Space and Power Footprint.

• Lease Line Service Flexibility. E1, E3, Sub-Rate GE, Line-Rate GE, & Sub-Rate 10GE

Enterprise B

Enterprise C

Enterprise A

Enterprise B

Enterprise C

L1 Lease Line

GE, 10GE, E1, E3

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North America Mobile Backhaul Tier 2

Wholesale L1/L2

ATT

Verizon

ATT

CPT 600

MPLS-TP IP/MPLS EVC

Verizon

ASR9K

2G/3G/4G Node

2G/3G/4G Node

IP RAN

Wholesale L1/L2

Cell Tower

Business Driver

• Growth in Ethernet Services leads to Packet Transport migration.

Cisco Solution and Value Proposition:

• CPT Provides compact, scalable and pay as your grow architecture.

• Strict transport SLAs for L1/L2 services with MPLS-TP.

• Unified MPLS w/ CPT & PW Head-End on ASR9K Simplifies Network Design and Enables L3 Services in ETN.

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Australian Utility Use Case Smart Grid

Sub-Station

CPT 600

MPLS-TP VPWS

ASR9K

IP/MPLS

Tele-Protection & SCADA

Voice, Video, Data

Business Driver

• Next Generation Converged Network to support Smart Metering, VOIP, Video Surveillance & IP Data Services

Cisco Solution and Value Proposition:

• MPLS-TP insures Strict Latency & Bandwidth SLA’s are meet for Teleprotection requirements

• Unified MPLS End to End Architecture

Sub-Station

Radio

Sub-Station

Sub-Station

Sub-Station

IP/MPLS

VPWS Tele-Protection

& SCADA

Voice, Video, Data

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MPLS-TP Standards Update

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1: [RFC 5317]: Joint Working Team (JWT) Report on MPLS Architectural Considerations for a Transport Profile, Feb. 2009.

Definition of MPLS “Transport Profile” (MPLS-TP) protocols, based on ITU-T requirements

Note: IETF decided to support single MPLS-TP OAM solution. IETF Chair stated at IETF 79 (11/2010) and IETF 80 (3/2011)

Derive packet transport requirements

Integration of IETF MPLS-TP definition into transport network recommendations

IETF and ITU-T agreed to work together and bring transport requirements into the IETF and extend IETF MPLS forwarding, OAM, survivability, network management, and control plane protocols to meet those requirements through the IETF Standards Process.[RFC5317]1

ITU-T withdrawal of T-MPLS draft G.8114 in Jan. 2008.

IETF and ITU-T Joint Work on MPLS-TP For Your

Reference

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IETF MPLS-TP General Definitions MPLS-TP IETF Standards Update (1)

For Your Reference

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IETF MPLS-TP Data Plane, Protection Definitions MPLS-TP IETF Standards Update (2)

For Your Reference

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IETF MPLS-TP OAM Protocol Definitions MPLS-TP IETF Standards Update (3)

For Your Reference

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Summary

Where is Ethernet Going?

MPLS-TP Pre-Requisite

MPLS-TP Tunnel (LSP) Provisioning

MPLS-TP Single Segment Pseudo-Wire (PW) Provisioning

MPLS-TP OAM

MPLS-TP Resiliency

IP/MPLS-(TE) & MPLS-TP Interoperability

MPLS-TP Case Studies

MPLS-TP Standards Update

Summary

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Glossary Of Terms

90

MPLS-TP: Multi Protocol Label Switching Transport Profile

OAM: Operations, Administration and Management

QoS: Quality of service

SONET: Synchronous Optical Networking

SDH: Synchronous Digital Hierarchy

PW: Pseudowire

LSP: Label Switch Path

GAL: Generic Associated Channel Label

ACH: Associated Channel Header

DCN: Data Communication Network

BFD: Bi-Directional Forward Detection

CIR: Committed Info Rate

PIR: Peak Info Rate (PIR)

AC: Attachment Circuit

LDI: Link Down Indication

AIS: Alarm Indication Signal

POTS: Packet Optical Transport System

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Complete Your Online Session Evaluation Give us your feedback and you

could win fabulous prizes. Winners announced daily.

Receive 20 Passport points for each session evaluation you complete.

Complete your session evaluation online now (open a browser through our wireless network to access our portal) or visit one of the Internet stations throughout the Convention Center.

Don’t forget to activate your Cisco Live Virtual account for access to all session material, communities, and on-demand and live activities throughout the year. Activate your account at the Cisco booth in the World of Solutions or visit www.ciscolive.com.

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Final Thoughts

Get hands-on experience with the Walk-in Labs located in World of Solutions, booth 1042

Come see demos of many key solutions and products in the main Cisco booth 2924

Visit www.ciscoLive365.com after the event for updated PDFs, on-demand session videos, networking, and more!

Follow Cisco Live! using social media: ‒ Facebook: https://www.facebook.com/ciscoliveus

‒ Twitter: https://twitter.com/#!/CiscoLive

‒ LinkedIn Group: http://linkd.in/CiscoLI

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