state of packet optical integration

State of Packet Optical Integration

Valéry Augais, Office of the CTO

24 June 2015 S ta te o f Packet Opt ica l In tegra t ion

Who are we?

01

24 June 2015 S ta te o f Packet Opt ica l In tegra t ion 2

Underpinned by an unrivalled network, data centre services and enterprise cloud platform footprint

- 168,160 km of LDN, metro fibre and subsea & terrestrial leased capacity connecting 28 countries across 3 continents.

- 205 connected cities; Metropolitan area networks in 47 cities

- 22,500+ buildings directly connected

- Single end to end SLA

- Consistent user experience

- Single view of service activity and performance

- Ability to rapidly change your network and IT services as business needs change

- 24/7 operational management


Underpinned by an unrivalled network, data centre services and enterprise cloud platform footprint

- 168,160 km of LDN, metro fibre and subsea & terrestrial leased capacity connecting 28 countries across 3 continents.

- 205 connected cities; Metropolitan area networks in 47 cities

- 22,500+ buildings directly connected

- Single end to end SLA

- Consistent user experience

- Single view of service activity and performance

- Ability to rapidly change your network and IT services as business needs change

- 24/7 operational management


168k+ LDN, metro fibre and

subsea & terrestrial

leased capacity

29 Carrier neutral Colt

owned and / or

managed data centres

500+ Network to Network

interfaces

20k+ Buildings directly

connected

205 Cities connected

28 Countries

25k+ Customers

5k+ Employees

16 Languages supported by

24/7 customer service

50+ Industry awards

521 Colt-connected

data centres

3 Continents

What was the vision a few years ago?

02


Reference architecture in the metro and core

6

Business customers only

Enterprise

Wholesale (SP, CP)

Media and government

Site typology

Technical nodes (1 to 5)

Data centres (0 to 3)

3rd party sites CH, CO, PoP (10 to 10s)

Customer premises (100s to 1000s)

Access medium

Fibre (ring topology)

Copper (ULL)

Metro technology

Carrier Ethernet (packet)

C/D-WDM (metro core)

Core technology

D-WDM, OTN, MPLS

Colt Fibre

Leased Capacity

MAN with Data Centre

MAN

Central Office,

Off-net PoP, POI

Customer Premises

ULL Copper

I/Cs and NNIs

Core Metro Core Customer Premises

Network layer integration – Historical situation


L2 packet core (MPLS)

L3 packet core (MPLS)

L3 service

L3 CPE

IP services over Ethernet access (metro)

Ethernet services (metro & inter-metro)

L2 access &

aggregation (Ethernet)

L3 PE

L2 PE L2 service

L2 CPE

L2 CPE

L2 service IP NNI

• Operations • Architecture

Simplification • Service unit costs • Lead times • Hybrid L2-L3 VPN

Product • Reduced CAPEX • Reduced OPEX

Cost

Pre-2012

Inter-metro

Core

Network layer integration – Packet optical case

Merging the packet and optical hardware layers in the core

Example with tier-1 metro but applicable to most tiers


AN2

AN1

AN2

AN1

Access Aggregation Edge

Metro

1G/10G

1G/10G

P1

P2

Optical core (OTN & D-WDM)

O1

O2

L2 CPE

L3 CPE

L2 CPE

PE1

PE2

AG1

AG2 L2 CPE

L2 CPE





AN2

AN1

AN2

AN1


Metro

1G/10G

1G/10G

L2 CPE

L3 CPE

L2 CPE

PE1

PE2

AG1

AG2 L2 CPE

L2 CPE

Packet optical core (MPLS, OTN & D-WDM)

PO1

PO2

Inter-metro

Core

Inter-metro

Core





AN2

AN1

AN2

AN1


Metro

1G/10G

1G/10G

P1

P2


O1

O2

L2 CPE

L3 CPE

L2 CPE

PE1

PE2

AG1

AG2 L2 CPE

L2 CPE

Packet optical core (MPLS, OTN & D-WDM)

PO1

PO2

• Multi-layer switching platform

– WDM (colour-less, direction-less)

– OTN

– Packet

• OTN switching

– Fill-in the high speed 100G waves

• Packet switching

– MPLS switching (LSR)

– CP protocols (IS-IS, OSPF, TE, LDP, RSVP)

– No LER (VPN, VPLS, GRE, MC), no BGP

Inter-metro

Core

Network layer integration – Initial design thoughts

Network design considerations

L2 and L3 services integrated on the same physical infrastructure but kept logically separated through the use of dedicated VLANs

― Service QoS characteristics uncompromised thanks to no queue sharing (8xL2 queues + 8xL3 queues)

Key protocols for L2 and L3 services

No mandatory requirement of MPLS-TP for L2 services

― To start with MPLS properly tuned seen good for the job (OAM included)

― … but over time MPLS-TP possibly useful for service assurance activities

Scope of packet transport

― Ethernet & IP data services only, no Circuit Emulation Services for TDM & OTN

― Only sub-1Gbps services (back in the days of 10Gbps packet switch ports) 24 June 2015 S ta te o f Packet Opt ica l In tegra t ion 11

Functions L2 services L3 services

IGP

Path computation

Topology discovery

Path creation

OSPF

NMS/OSS based

OSPF-TE (booked bandwidth)

ERO + RSVP-TE

IS-IS

IGP (core)

IGP

IGP + LDP

Quoted from 2012

What are the state of the industry and the diversity of SP use cases?

03


State of packet optical in the industry

With a focus on the MPLS switching case


Packet optical &

MPLS switching

Our packet and

optical bits run

best with hardware

separation

System vendors

Operators

Colt stakeholders

Industry forums

Networks only

need a centralised

CP based on

openflow (ONF)

Our main

customers

prefer status

quo

Our packet and

optical teams

must stay

administratively

separate

Other use

cases are

top of list

Great case and

right on-time for

Next Gen optical

core (100G)

We fully support

but cannot

commit yet We lack packet

or optical

expertise

The diversity of service provider use cases

Diversity well captured in Packet Optical Convergence

A multi-operator joint WP led by Telefonica and published in 2014

Data plane integration as per IP over WDM

Pluggable tunable CFP optics on routers

Multi-layer control plane integration models: UNI, E-NNI, peer, etc.

From more to less overlay

Other multi-layer integration aspects: resilience, planning and management

Shared mesh protection, SLA management, resource optimisation, etc.

Ethernet switching-enabled optical core

Variant of MPLS switching

LSR router by-pass

Optical express equivalent in the electrical domain

Network layers of consideration

Metro access, metro core or core 24 June 2015 S ta te o f Packet Opt ica l In tegra t ion 14

http://www.tid.es/sites/526e527928a32d6a7400007f/assets/532c7ce328a32d4d710006bd/White_paper_IP_Optical_Convergence__1_.pdf

What are the various routes taken?

04


Regular

customer sites

Packet optical in the core


AN2

AN1

AN2

AN1


Metro

1G/10G

1G/10G

Inter-metro

Core

L2 CPE

L3 CPE

L2 CPE

AG1

AG2 L2 CPE

L2 CPE PE1

PE2

P1

P2


O1

O2

100Gbps

packet

2-3Tbps highly reliable

packet nodes

Collapsing the PE & P packet layers

Interim alternative to packet optical

Regular

customer sites

Edge



AN2

AN1

AN2

AN1

Access Aggregation

Metro

1G/10G

1G/10G

L2 CPE

L3 CPE

L2 CPE

AG1

AG2 L2 CPE

L2 CPE

Inter-metro

Core

100Gbps

packet

PE/P1

PE/P2


O1

O2


packet nodes

Tier-2 cities

AG collapsed with PE & P

When scale issue in the long term

1. Activate packet-optical

2. Deploy dedicated P hardware

L2/L3-integrated queues

but still separate CPs

• L2: OSPF & RSVP-TE

• L3: IS-IS and LDP



Regular

customer sites

Edge



AN2

AN1

AN2

AN1


Metro

1G/10G

1G/10G

Inter-metro

Core

L2 CPE

L3 CPE

L2 CPE

AG1

AG2 L2 CPE

L2 CPE PE1

PE2

P1

P2


O1

O2

Inter-metro

Core

100Gbps

packet

PE/P1

PE/P2


O1

O2


packet nodes

Tier-2 cities

AG collapsed with PE & P

When scale issue in the long term

1. Activate packet-optical

2. Deploy dedicated P hardware

L2/L3-integrated queues

but still separate CPs

• L2: OSPF & RSVP-TE

• L3: IS-IS and LDP



16 cities live to date

3 tier-1 and 13 tier-2

The metro case with 3rd-party key business sites (DC & CH)


Edge

AN2

AN1

Access Aggregation

Metro

100Gbps

packet

PE/P1

PE/P2

Small business

site (tier-3)

Typical business

site (tier-1 & 2)

L2 & L3 services

@ 100Mbps & 1/10Gbps

10G

L2 CPE

L2 CPE

AN1

AN2 AG1

AG2

Colt node(s)

Nx10Gbps over

P2P passive C-WDM Building primarily on 100G packet access

Leaving WDM for smallest sites only

The metro case with 3rd-party key business sites (DC & CH)


Edge

AN2

AN1

Access Aggregation

Metro

100Gbps

packet

PE/P1

PE/P2

Small business

site (tier-3)

Typical business

site (tier-1 & 2)

L2 & L3 services

@ 100Mbps & 1/10Gbps

10G

L2 CPE

L2 CPE

AN1

AN2 AG1

AG2

Colt node(s)

Nx10Gbps over

P2P passive C-WDM Building primarily on 100G packet access

Leaving WDM for smallest sites only

125 top DC/CH sites across EU and APAC

50 in EU by year-end and 75 in APAC today

With rapid service turn-up and bandwidth changes (5days)

Besides this, direct access to 560 vendor neutral sites

vCPE for Internet Pre-NFV PE-based

Multi-vendor Single per platform component

QoS alignment in the metro DSCP-PCP mapping, queue sharing

vCPE for IP-VPN Pre-NFV PE-based

Edge integration

Core integration Technical capability

Core integration Migration of first cities

Core integration 100G packet

Next Gen optical core 100G coherent

Achievements and future plans


2014 2013

2015

2016

Multi-vendor next Per component (CPE, etc.)

Core integration Next enhancements

(single IGP, dynamic L2 core,

packet-optical, SR)

SDN in the WAN Customer experience

Summary

05


Summary

Tactical design deployed due to LSR-enabled optical core feature missing

But feature still very interesting to efficiently solve scalability issues in the future

Leveraging packet transport and statistical multiplexing

No WDM to connect regular customer sites and typical business sites

― Only to smallest business sites (with P2P passive C-WDM)

Packet platform ready to support sub-10Gbps services

End-to-end from access through core

Moving next to SDN-type of customer services

NaaS, bandwidth flexing, bandwidth calendaring, etc. made available through customer portal & customer API and turned up virtually instantly


Thank you For your time

[email protected]


state of packet optical integration

Technology

metro fibre

core example

customer service

data centre services

unrivalled network

coltconnected data centres

network interfaces

optical hardware layers