routing applications: state of the art and disruptions...market requirements •global reach for...

© 2019 Juniper Networks Juniper Public

Routing Applications: State of the Art and Disruptions

Sachin NatuSr Director, Product Management


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Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right to

change, modify, transfer, or otherwise revise this publication without notice.

2


AGENDA

3

• Architectural Vision For Business Simplicity

• State of the Art Innovations

• Routing Innovations For Growing Markets

• 5G Metro

• Telco Cloud

• Controller Driven Automation

• Conclusion


NETWORK PROVIDERS CHALLENGES AND HOW TO SOLVE THEM

Service Agility and Service Customization

Network Scaling (Bandwidth & Reach)

OpEx Reduction

Architectural Modernization

Architectural Modernization(Protocol Simplification, Stateless)

Deployment Simplification(Scale Out, Scale Up, Network slicing)

Automation(Programmability, Controllers)


SERVICES SIMPLIFICATION: DO MORE WITH LESS

Internet++

IPVPN++

EVPN

Internet

IPVPN

Bridging

VPLS (FEC 128)

VPLS (FEC 129)

L2VPN

L2Circuits

MC-LAG

Scale Out Services Edge++

Smooth Services Migration Ensuring Business Continuity

Operation Simplicity(Less Protocol, Stateless,

Programmable)

Service Ubiquity (Dynamic Transport)

High Availability(Reliable Link/node/path protection)

Scalability(Support for 100x node scale and

Service)

Smart Technology Choices Business Transformation


EDGE SCALE OUT FOR BIZ SERVICES AND INTERNET PEERING

Small Blast Radius

Independent systems

Better Convergence

BGP PIC Edge BGP Multi-path

All L3 Services

IP VPNsInternet

Easy Capacity Add

Edge CLOS Scale out

BGP multi-pathing & BGP add path

BranchOffice

HQ

Cell Site Router

Enterprise WAN

CoreMetro Internet

End to End Transport: BGP-LCU, eODN

SR-MPLS (v4 or v6)IP Fabrics (v4 or v6)

SR-MPLS (v4 or v6)

End to End Services: EVPN, IPVPN, IP


EVPN: ETHERNET SERVICES WITH OPERATIONAL SIMPLICITY OF IP

Link Efficiency

All Active forwardingLoop Prevention

Convergence

Built in HA - fast convergence Fast reroute

L3 and L2

L2 & L3 Integration In Built-in the protocol

Any Transport

MPLS transportSR transportIP Fabric transport

Custom Services

Policies for service customization

Scale Out Ethernet Services with any transport

BGP signaling For MAC Addresses

EVPN

PE2

EVPN

PE1

EVPN

PE3

EVPN

PE4

CE

CE

MPLS

SR

VxLAN

MPLSoUDP9


EVPN : INDUSTRY’S MOST COMPLETE IMPLEMENTATION

Simple L2 services & IP integration

• E-line, E-LAN, E-tree, IRB & Type 5, deployable scale

OAM/L2 security integration

• 802.1ag, Storm control, MAC pinning, FF support

L2 Svc optimization & Mass Migration

• Seamless migration (VPLS to EVPN), P2MP for BUM delivery efficiency, SR integration

SDN Deployments

• Gateway model, Streaming telemetry, Yang data model

Controller & Telemetry

• CSD integration

• Northstar integration

• Jvision support

Help in journey to cloud grade networks

We have you covered in all types of deployments


TRANSPORT SIMPLIFICATION: DO MORE WITH LESS

SR

IP Fabric/Tunnels

IP Routing

Bridging

MPLS

(LDP/RSVP)

LFA/rLFA

LDP/IGP Sync

Smooth Transport Migration Ensuring Business Continuity

Operation Simplicity(Less Protocol, Stateless,

Programmable)

Service Ubiquity (Dynamic Transport)

High Availability(Reliable Link/node/path protection)

Scalability(Support for 100x node scale and

Service)

Smart Technology Choices Business Transformation


SR : COMPLETE IMPLEMENTATION

Shortest Path Routing• No additional protocols

• Migration from LDP

• ECMP

FRR (TI-LFA)

• 100% convergence

• For all topologies

Traffic Steering• Light weight TE

• No bandwidth reservations

• On-box CSPF

Traffic Engineered• Diverse Path

• Bandwidth

• Migration from RSVP

Inter-domain TE

With ControllerWithout Controller

Help in journey to cloud grade networks

We have you covered in all types of deployments


JUNIPER SR SUPPORTS ALL USE CASES TODAY

AGGREGATIONAGGREGATION

w/ HA

Light TE -Core

TE - CORE

LDP Replacement LDP ReplacementTI-LFA

Light Traffic Engineering Controller based Traffic Engineering

SHIPPING SHIPPING SHIPPING SHIPPING


HOW TO CHOOSE BETWEEN SR-MPLS & SRV6 (IP FABRIC)

SR-MPLSv4 Infra

SR-MPLS v6 Infra

SRv6 SRv6+

Accelerate Deployments(Complete Support)

IPv6 Infra(Just works)

Support Better Economics & Easier Migration

Freedom of Choice for Transport Technology

Today’s Typical Deployments (core, edge, metro) Today’s Typical Deployments (data centers)

SPs who run MPLS Networks and Like it SPs who want to migrate away from MPLS


A BIT OF CONTEXT: POPULAR DEPLOYMENT MODELS TODAY

Segment [0-2]

Source Address

2001:db8:0:1::1

Destination Address

2001:db8:0:1::5

IPv6 DSCP Flow Label

Payload Length 40 Hop Limit 254Next HDR

TCP

TCP Header

Segment [3-6]

VPN Label

SR-MPLSWith IPv4 or IPv6 Infra

P

A

Y

L

O

A

D

LABEL

STACK (7)

P

A

Y

L

O

A

D

252

Destination Address

Source Address

Hop LimitNext HDRPayload Length

DSCP Flow LabelIPv6

HDR Type

4

Length

IPv6Next HDR

4

Seg Left

FlagsLast Entry

Tag

120

2001:db8:0:1::4

SRH

0

1

2001:db8:0:1::2

Source Address

2001:db8:0:1::1

Destination Address

2001:db8:0:1::5



TCP

TCP Header

UDP Header VPN Label

IPv6 Outer

Tunnel

Label Switching IP Routing (IP Fabric)

IP (UDP) FabricsWith IPv4 or IPv6 Infra

▪ Widely deployed in WAN

▪ Both TE and shortest path options

▪ Widely deployed in DCs

▪ Shortest path routing, no TE requirement


TECHNOLOGY CHOICES FOR TRAFFIC ENGINEERING / TI-LFA ?

Segment [0-2]

Source Address

2001:db8:0:1::1

Destination Address

2001:db8:0:1::5



TCP

TCP Header

Segment [3-6]

VPN Label

SR-MPLSWith IPv4 OR IPv6 Infra

SRv6

P

A

Y

L

O

A

D

P

A

Y

L

O

A

D

LABEL

STACK(7)

Segment 2

252

Destination Address

Source Address


DSCP Flow LabelIPv6

HDR Type

4

Length

IPv6Next HDR

4

Seg Left

FlagsLast Entry

Segment 5

Tag

2001:db8:0:1::16

2001:db8:0:1::17

120

2001:db8:0:1::4

SRH

0

1

2001:db8:0:1::2

Source Address

2001:db8:0:1::1

Destination Address

2001:db8:0:1::5



TCP

TCP Header

Segment 6

2001:db8:0:1::13

2001:db8:0:1::12Segment 1

2001:db8:0:1::11Segment 0

2001:db8:0:1::14Segment 3

Segment 4

2001:db8:0:1::15

SRH

STACK

(7)

P

A

Y

L

O

A

D

252

Destination Address

Source Address


DSCP Flow LabelIPv6

HDR Type

4

Length

IPv6Next HDR

4

Seg Left

FlagsLast Entry

Tag

120

2001:db8:0:1::4

SRH

0

1

2001:db8:0:1::2

Source Address

2001:db8:0:1::1

Destination Address

2001:db8:0:1::5



TCP

TCP Header

CRH [0-2]

CRH [3-6]

DO

CRH

STACK (7)

SRv6+ (IETF: SRm6)

Use Label Switching Need TE, TI-LFA on IP Routing▪ Use IPv6 extension headers for TE

▪ Works only on IPv6 Infra

▪ Deployment hardened


KEEP IT SIMPLE…

15

Decision Tree

Have MPLS / Like it, want easy migration

IP FabricSR-MPLSHave IP Fabric / Want IP fabric

IPv4 Infrastructure IPv6 Infrastructure

SR-MPLS SR-MPLS

Need TE No Need For TE

UDP Tunnels▪ VxLAN

▪ MPLS o UDP

IPv4 Infrastructure

UDP Tunnels▪ VxLAN

▪ MPLS o UDP

TE ?

IPv6 Infrastructure

▪ All of today’s services work as is

▪ Both TE and non-TE optionsBW overhead /Auth?

SRv6+ (SRm6) SRv6

Lowest BW, Need auth Not important


IN SUMMARY : HOW TO CHOOSE IP FABRIC TECHNOLOGY?

16

Internet

(IPoUDP)

UDP /IP

SRv6

SRv6+

Use IP Fabrics for non TE networks▪ Simple Shortest Path IPv4/IPv6 Routing▪ Built In Hashing

IPVPNs

(MPLSoUDP)

EVPN

(VxLAN)

Deployment Hardened

Go to SRv6/SRv6+ if you need▪ Traffic Engg / Network Slicing▪ TI-LFA


ARCHITECTURE FOR SCALABLE AND SIMPLE NETWORKS

Better Economics with Modern Architectures

17


END TO END ARCHITECTURE FOR SIMPLICITY

18

BranchOffice

HQ

Cell Site Router

Enterprise WANBranchOffice

Cell Site Router

CoreMetro Metro

End to End Transport: eODN, BGP-LCU

SR-MPLS (v4 or v6)IP Fabrics (v4 or v6)

SR-MPLS (v4 or v6) SR-MPLS (v4 or v6)IP Fabrics (v4 or v6)

Multiple Domain Controllers

End to End Services: EVPN, IPVPN, IP

End to end architecture with SR & EVPN


WHAT IF YOU DON’T CONTROL EVERY PART OF NETWORK?

Market Requirements

• Global Reach for Services

• Business Agility for each business entity

• Operational Simplicity

Juniper Differentiation

• Extensive support for IP Fabric (IP Tunnels)

• Wide technology Options - business drive tech choice

• IP/MPLS, SR, IP Fabrics

• Confederation of NS Controllers for E2E.

BranchOffice

HQ

Cell Site Router

3rd Party Network or Internet Enterprise WAN

Cloud Apps

TE Domain (SR-TE)Cell Site Router

BranchOffice

MPLS / IP FabricsMPLS

IP fabrics

Branch Office

Cell Site Router

MPLS

IP Fabrics

1

3

2

Branch Office

Traversing different admin domains


DAY IN LIFE OF AN AGILE GLOBAL NETWORK OPERATOR

Colo Hotel

CoreSR-MPLS with TE

AD2

Other Provider /Large Enterprise

AD1

DC Edge – WAN Team▪ Isolates DC network from WAN▪ Assure app SLA across WAN

Internet

Peering – WAN Team▪ Manage secure Internet connectivity▪ Manage App SLA based steering

Customer connect Team ▪ Cloud Connect for large Enterprises / SPs ▪ Manage per customer SLA enforcement

Region 1

Cloud Router Team▪ Manage sub-nets in different DCs/ regions▪ Manage App security / Access Control

WAN Team▪ Transport SLA assured traffic engineered

traffic between PoPs and DCs

Teams working together with clean APIs to onboard a new customer in seconds


STATE OF THE ART INNOVATIONS

21

1. Deep understanding of current deployments

2. Honest understanding of its limitations AND changing markets

3. Leverage latest state of the art technologies to find solutions

4. Solve customer problems & drive deployments

5. Iterate


OPEN STANDARDS INNOVATION IS JUNIPER DNA

RFC Approvals

• 28 new RFCs with Juniper co-authors

Internet-Drafts in progress with Juniper co-authors

• 197 working documents

Dominant influence on cloud architectures

• BGP Enabled Services: 38

• Segment Routing: 12

• PCE : 11

• Traffic Engineering: 14

• RIFT: 4


• EVPN Multicast: Jeffrey/Wen/Eric/John

• Controller-signaled Multicast: Jeffrey Zhang

• The BGP Tunnel Encapsulation Attribute: Eric Rosen

• SRv6+ Services : Ron Bonica

• Routing in Fat Trees (RIFT) : Tony Przygienda

• SRv6+ (compressed routing header) : Ron Bonica

• Resilient SR Rings: Kireeti

• SR over UDP over IP: Adrian Farrel

• Separating Routing Planes using Segment Routing: Shraddha Hegde

• SR Policy: Shraddha Hegde

JUNIPER INNOVATIVE IDEAS @ IETF

Service Innovations

Transport Innovations


SRV6 VS SRV6+ (SRM6)

SID [0] (16B)

IPv6 Hdr (40B)

SID [1] (16B)

SID [4] (16B)

SID [3] (16B)

SID [2] (16B)

SID [0] (4 B)

IPv6 Hdr (40B)

SID [4] (4 B)

SID [3] (4 B)

SID [2] (4 B)

SID [1] (4 B)

SRv6 Header: 120B

SRv6+ Header :20B

SRV6+ FUNCTIONALITY WITHOUT COMPROMISE

• SRv6+ Transport SIDs fit in 4B

–Used for TI-LFA and NW slicing

• 5G and IOT scale ready

• Minimal header overhead

• Service SIDs (VPN labels) as Dest Option

• End to end Authenticated

• Seamless integration with all BGP services

• Integrates with today’s VxLAN


SR OVER UDP OVER IPEnable phased deployment of Segment Routing

Juniper Innovations

Market Requirement

• Deploy SR MPLS in IP networks where some nodes are SR-capable and others are not

• Use UDP to tunnel between SR-capable nodes

• UDP source port entropy for load balancing

• Single SR encapsulation (MPLS-SR)

• draft-bryant-mpls-unified-ip-sr

• Mitigates the requirement for SRv6

IPvX Header

MPLS SIDs Label Stack

IPvY Header

Payload

Src = Sending SR capable node

Dst = Next SR capable node

Next protocol = UDP

Stack of SIDs exactly as it is an MPLS SR packet

Unchanged IPvY header and dataI.e. encapsulated packet

UDP Header Src Port = Entropy

Dst Port = MPLS-in-UDP


LATEST INNOVATIONS

Better Economics with Modern Architectures

26


BGP 64 WAY ADD PATH

• Easy capacity addition

• Support all Applications

• Reduce blast radius of failure

27

Easy capacity addition and Resiliency

Market Requirement Juniper Differentiation

• 64 wide peering and DC fabric

• Add path for inet and VPN address families

• Consistent Convergence Performance

• Entropy friendly multi-pathing architectures


BGP PIC N+1 PROTECTION

28

Juniper Innovations

Market Requirement

• Increase BGP Peering resiliency

• Increase BGP Peering scale

• Decrease BGP failover time (seconds, not minutes)

• draft-szarecki-grow-abstract-NH-scaleout-peering

• eBGP failure causes NH withdrawal from IGP

• Instant BGP prefix invalidation (regardless of scale)

• N+1 BGP PIC Edge protection (v4, v6, LU)

Fast Failover in Scale-Out Peering Architectures


BGP PIC EDGE IN SEAMLESS MPLS ARCHITECTURE

29

Juniper Innovations

Market Requirement

• Minimize failover times (subsecond) during

• Egress PE failure

• ASBR failure

• ABR failure

• BGP PIC Edge for egress PE-CE link

• BGP PIC Edge for egress PE node

• Covers ABR/ASBR node failure as well

• Pre-programmed backup next-hops in FIB

Minimize failover time in seamless MPLS networks

ABR failure ASBR failure Egress PE failure


BGP NH TRIGGERED DYNAMIC SR-TE TUNNEL CREATION

30

Minimize configuration effort for bulk SR-TE configuration

Juniper Innovations

Market Requirement

• Applications use SR-TE tunnels as transport

• Minimize the configuration effort in large networks

• Framework for dynamic SR-TE tunnel creation

• SR-TE tunnel templates with some constraints:

• Plane-A template: use P1 as first hop

• Plane-B template: use P2 as first hop

Plane B

Plane A

Auto-create SR-TE tunnels with someconstraints (e.g., go via ‘Plane A’)

P1

P2


NETWORK SLICING WITH SRLeveraging Multiple Network Topologies

Juniper Innovations

Market Requirement

• Separate planes for traffic based on SLA

• Traffic confinement within the plane even if a plane is partitioned

• TI-LFA protection within routing plane

• Separate algorithms per routing-plane

• Routing plane –SID advertised per algorithm

• Separate SPF per-plane


ROUTING INNOVATIONS FOR GROWING MARKETS

32


5G METRO ARCHITECTURE BLUEPRINT

33

MASSIVE BANDWIDTH(Nx10GE, 25GE, 100GE, 400GE)

OPERATION SIMPLICITY(Less Protocols, Stateless,)

HIGH AVAILABILITY(Reliable Link/node/path protection)

SCALABILITY(Support for 100x node scale and Service)

SERVICE DIFFERENTIATION(Differentiated Dynamic Transport SLA)

APPLICATION AWARE ROUTING(Seamless Transport Application stitching)

33© 2019 Juniper Networks 33

eNodeB

LTE-A

Access/Fronthaul

Service Edge/Core

10G

BW

LowLatency

gNBNSA/SA

5G 25G

Infra

Service

Segment Routing / SR-TE

EVPN (L2 and L3)

< 150us,+/- 65ns

L2 / L3

< 10ms, +/- 1.5us

L3

vEPC 5GCCRAN

MECMEC

Controller/Orchestrator

EPC/5GCN x10G/25GE

N x 100G

N x 100G/400G

AggregationPre-Agg

100G

NetworkSlicing


TELCO CLOUD DISTRIBUTION

34

Pre-Aggregation

Aggregation CoreAccess

34© 2019 Juniper Networks 34

Integrated Infrastructure: Control + Fabric (Virtual, Physical, Cloud)

Use cases (VNFs, CNFs, PNFs)

Digital Services

CI/

CD

APIs

Distribution of Edge Cloud Distribution of Telco Cloud

Leverage last mile presence in 1,000s of locations to provide better QoE

Cloudify Cell Sites, Cos, POPs to run low-latency / high-performance VNFs & IOT / M2M Workloads

Improved TTR to bring new services to market

Expense Savings: Improved Operational Efficiency


CONTROLLER INNOVATIONS

35


NORTHSTAR SR CONTROLLEROne single controller for RSVP, LDP and SPRING architectures

• Support all networks – LDP, RSVP, SPRING

• PCEP extensions for RSVP, SPRING

• BGP SR-TE support

• NetConf extensions for LDP

• jVision collector / Netflow collector support

Juniper Differentiation

• TE Controller for all network

• Graceful migration to SPRING

• Network visibility for closed loop control

Market Requirement NorthStar

PE1

PE3

P2

P1

P3

P4

PCEP-SR

PCEP-SR

306070

SID: 10

SID: 30

SID: 60SID: 20

SID: 50


HEALTHBOT: EXTENSIBLE NETWORK MONITORING TOOL

NETCONF CLI SNMP SYSLOG JTI OPEN CONFIG

KAFKA BYOI

Use Case

Playbooks

MobileREST

API GUI

• Multiple ingest methods

• Pull & push. Tag

• Open & extensible

• Scale out

• Fully automated

• Multivendor

• Time series storage

• Replication & HA*

• DB abstraction*

• Retention policies

• Kafka publish

• Flexible summarization

KAFKA

• In-house engine

• DSL Programmable.

• Wide range of use cases

• Playbook library

• Embedded ML/AI

• Model driven RCA*

• Versatile integration

• REST/Webhook/slack

• Email/MS-Teams/kafka

• Customizable Canvas

• RBAC*

• Mobile access

Ingest

Store

Analyze

Visualize & Act

Long term storage

IPFIX


CONCLUSION

39


WE HAVE TECHNOLOGIES TO SOLVE BUSINESS CHALLENGES

Architectural Modernization

(Protocol Simplification, Stateless)

Deployment Simplification

(Scale Out, Scale Up)

Automation

(Programmability, Controllers)


THANK YOU

routing applications: state of the art and disruptions...market requirements •global reach for...

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