Best Practices for using Logical Routerin Multilayer Service Network
Hidetsugu Sugiyama
Director of R&D support, Technical Operations APAC

October 2007

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Agenda Multi-Layer Service Network(MLSN) architecture JUNOS Logical Router Case study – SINET3
 JUNOScript2.0 for MLSN Provisioning Multi-Layer Resource Control
 Summary

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What is Multi-Layer Service Network?
 Optical path cut throughcontrol by GMPLS• Dynamic Layer1 pathsetup in GMPLS based
Multi Layer Network
 Multilayer correlation• Correlation for GMPLS
optical path layer and MPLS
packet path layer provisioning

IPIP

EtherRtr8

Rtr6

IP

PE4IP

L3-VPNPE2Ether

L2-VPN

PE5PE3

PE1

OXC3
OXC1

 Multiple networks accommodation• Multiple services (L1VPN, L2VPN,
L3VPN, Internet, IPv6, etc) in a
Multilayer Service Network.

IPv4/IPv6
Internet

Rtr7

OXC2

Optical transport network

OXC3

GMPLS Control PlaneOXC1OXC2Copyright © 2007 Juniper Networks, Inc.

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www.juniper.net3JUNOS Logical Router(LR) Introduced in JUNOS 6.0 (Q3 2003).
 Isolates routing protocols and interfaces. Provides
great hardware reuse with shared uplinks andefficient inter-LR forwarding (lt- tunnel).
 Deployed by our customers for service separation,
additional security, managed service, substitute forphysical router.
 Most protocol features can be configured on every LR.
• IPv4,IPv6,Multicast,VPLS,L2VPN,L3VPN,6PE,6VPN,DiffServ TE, P2MP TE, etc

 GMPLS signaled by LR master.

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4Drivers for Multilayer Service Network withLogical Router Save CAPEX and OPEX:• Share expensive forwarding plane.
• Converge separate services into shared backbone.
• Collapse multiple routers in a POP into a single physicalrouter.
 Separate services:• Dedicated routing process per Logical router(LR).
• Security between services (public IP vs. private IP).
• Fault isolation between services.
• Different service and core groups need to manage the same
physical router(MR: Master/main router).

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Network Consolidation model
Vertical Vertical consolidation:
Combine logical routers and collapse
interconnected router functions into asingle router

LRLR• Vertical Edge consolidation• Interconnect between different
services,e.g. VPLS<->L3VPN, etc• Vertical POP consolidation• Managed CPE service in IDC

MR

PhysicalLR

LR

 Horizontal consolidation:

LR

Combine unconnected logical routerfunctions into a single routerLR

LogicalLR• Horizontal consolidation for differentnetworks• Isolating different services• Multi-Layer Service NetworkLRMRPhysicalHorizontal(LR: Logical Router, MR: Main/Master Router)

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Logical Router in Multi-Layer Service Network
Key features:-Service domain virtualization using Logical Router-Multi Layer TE (Each TE is managed by each Logical Router)-Each service operator manages each Logical Router-Pseudo I/F for converged forwarding plane-Each Layer1 path is managed by MR with GMPLS

IPv4/v6
Internet

IPv4/v6
Multicastfor CDN

EtherPE

IPv4/v6
Internet

Ether

L3VPN
PE

Ether

IPv4,IPv6
MPLS
GMPLS

PE

Ether

ATM

L2VPNATMATMLR

LR

MPLS
P2MP for
CDN

LR

L3VPN

LR

VPLS
L2VPN

LR

LR

IP Optical Core Network(GMPLS Router + OXC / ROADM )IPv4/v6
Internet
MPLS
P2MP for
CDN

LR

L3VPN

LR

VPLS
L2VPN

ATM

Ether

OpticalMRMR

MR: Master Router
LR: Logical Router
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OXC

OXC

OXC

OXC

OXC

OXC

MR

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SINET3 http://www.sinet.ad.jp/?set_language=en.
Multilayer Service Network

Internet
L3VPN
L2VPN
VPLS

LR4LR3LR2LR1PREDECESSORNETWORKSIP Router

Ethernet
SwitchSuperComputer

IP Network(Layer 3)
Ethernet Network(Layer 2)
Leased Line
(Layer 1)

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Innovative
Integration

IP Router

Ethernet
SwitchSuper
Computer

LR4
LR3LR2LR1T640 T640

SINET3

Core Core
L1SW L1SW

Multilayer
L1VPN
Service
Network
Layer1 Switch

IP Router Edge
L1SW
Ethernet
SwitchSuper
Computer

Proprietary and Confidential

NG-SDH/SONET(GFP,VCAT,LCAS)

Edge
L1SW

Edge
L1SW

Edge
L1SW

Edge
L1SW

LR:Logical Router

Edge IP Router
L1SW
Ethernet
SwitchSuper
Computerwww.juniper.net

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MLSN Provisioning Concern• Operation & Provisioning complexity

 Solutions• Adopting more Plug&Play protocols• BGP based VPNs (L3VPN, VPLS/RFC4761, L2VPN-kompera,NG-MVPN)• MPLS auto mesh
• IPv6 link local address• IPv4 Unnumbered TELink• GMPLS• etc• JUNOScript2.0• Auto-configuration for each service• Customized command for easy operation• Event-driven/Time-drivien operation
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JUNOScript for plug & play provisioning
JUNOScript2.0- Commit Script- OP Script- Event Script

JUNOScript2.0forAuto-configuration

NETCONF
for customizedprovisioning
LR4JUNOScript2.0
forAuto-configuration

JUNOScript2.0
forAuto-configuration

LR3LR2XML-RPC
IPv4/IPv6Internet Service

LR4

L3VPN, 6vpn
NG-MVPN

LR3

L2VPN
P2P service
VPLS
MP service

LR1

XML-RPCOXC

XML-RPCLR2

LR1OXC

LR4

IPv4/IPv6Internet Service

LR3

L3VPN, 6vpn
NG-MVPN

LR2

L2VPN
P2P service

LR1VPLS
MP service

OXC

PathResv

GMPLS control plane
Shared Physical IF
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Ideal of multi-layer resource control
 Control planeIP• (G)MPLS, resource
control to each layer (IP,Ethernet, SDH, OTN,etc)• Inter-Layer PCE, etc• Virtual Network
Topology management

VNT• Further study……

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Ethernet

PC
E

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SDH
(G)
M
PL
S

O
TN

SDH
Ether

LambdaFiber
T-MPLS?

PBT?

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11Summary
 Benefit of MultiLayer Service Network• Save CAPEX & OPEX by sharing platform & network• Keep dedicated routing policy for each service network layer JUNOS Logical Router design for MultiLayer Service Network• Horizontal consolidation• Converged forwarding plane• Dedicated routing process for each LR(network service) JUNOScript2.0• JUNOS automation for safe operation , provisioning and maintenance forbackbone network, and to reduce OPEX.

 Multi-Layer Resource Control• GMPLS helps multi-layer resource control to automate restoration andassists with connection provisioning for both packet and Optical layers.

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12Thank you!

hidet@juniper.net

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