Transcript Lucent Juniper Partnership CT Presentation

Capitalizing on New Standards
for ATM to MPLS Convergence
John Sax, CTO, Data Networking Group, Lucent Technologies
Dr. Kireeti Kompella, Distinguished Engineer, Juniper Networks
Mark Bieberich, Program Manager, The Yankee Group
Market Drivers for ATM to MPLS Interworking
Standards
• CAPEX and OPEX constraints necessitate phased migration to a
converged IP/MPLS network.
– Wholesale replacement of Layer 2 Edge is not economically feasible.
• Carriers must sustain profitable FR/ATM service revenue during the
IP/MPLS core consolidation process.
– Today’s FR/ATM service customers require QoS and SLAs to remain
intact as traffic migrates to IP/MPLS core.
• Carriers must achieve operational parity between ATM and MPLS
network domains.
– Layer 2 service provisioning and management processes must be
preserved in an IP/MPLS network environment.
• Inherent reliability characteristics of ATM must remain intact as traffic
migrates to the IP/MPLS core.
– ATM signaling and protection mechanisms remain essential to service
and network reliability.
2
IP/MPLS Convergence
ATM - MPLS Interworking Occurs in Phase II
INITIATION
Phase I
Announcement of IP/MPLS
consolidation plan
Initial investment in IP/MPLS
core begins; first phase of core
POPs upgraded or deployed
New enterprise, residential IPbased services targeted
2003 – 1H04
SERVICE
ADOPTION
Phase II
Core expansion continues;
edge investment accelerates
Targeted services from
Phase I experience high
revenue growth
Limited number of legacy
routers and switches
decommissioned
1H04 – 1H06
PROFIT
REALIZATION
Phase III
Critical mass of traffic from
overlay networks now converged
to IP/MPLS core
Enterprise and residential IP-based
services proliferate
Profitability goals of IP-based
services achieved
1H06 – 2008
3
Layer 2 Traffic Migration to IP/MPLS Core
Accelerating the Need for ATM to MPLS Interworking
• Recent Yankee Group Research:
– Aggressive service providers plan to migrate up to 50 percent of their
FR/ATM service traffic to the IP/MPLS Core in the next 3 years.
Rate of Traffic Migration From ATM to MPLS Core*
30
27%
25
20
14%
15
10
5
4%
0
2004
2005
2006
*taken from an ’04 Yankee Group
survey of 15 top service providers
worldwide
4
ATM to MPLS Interworking Standards
Requirement for Protecting Profitable Services
• Plans for IP/MPLS network consolidation must embrace standards
that protect growing, profitable revenue streams.
North America FR/ATM Service Revenue Forecast
Source: the Yankee Group, 2004
Revenue in millions of $US
14,000
12,000
10,000
8,000
ATM Service Revenue
6,000
FR Service Revenue
4,000
2,000
0
2004
2005
2006
2007
2008
5
Poll #1: Which business driver is most
important to your plans for adopting
standards-based ATM to MPLS interworking?
A. Minimizing CAPEX and OPEX while consolidating networks
B. Sustaining profitable FR/ATM service revenue with QoS
C. Achieving operational parity between ATM and MPLS network
domains
D. Preserving network reliability characteristics of ATM as traffic
migrates to MPLS
6
Together, Lucent and Juniper Drive for
standardized, scalable ATM to MPLS Interworking
• Lucent - Juniper Multiservice MPLS Core solution, jointly developed,
implements MPLS standards to deliver ATM over MPLS interworking:
– Standards-based, dynamic interworking between ATM and MPLS
– Scalable methods to distribute ATM routing information across the MPLS
network
• Lucent and Juniper contributions to the MPLS/FR Alliance efforts build
upon our joint Multiservice MPLS Core Solution (Releases 1 and 2)
MPLS/FR Alliance progress:
• Distributed Model for ATM to MPLS Interworking
• Virtual Trunks for scaling ATM networks across an MPLS core
• Multi-protocol Border Gateway Protocol (MP-BGP) for ATM address
reachability information
7
ATM to MPLS Interworking Standards
MPLS/FR Alliance - Integrated Model, Option #1
• Router performs both ATM routing and signaling and MPLS path
setup.
– Label Edge Router (LER) must scale 1,000’s of ATM VPs into MPLS
Pseudowire, only one opportunity to aggregate services.
– Separate network management systems must be integrated.
LER Aggregates
ATM VPs
Combined management of
ATM and MPLS networks
Label Edge Router
(LER)
Existing ATM
Network
Label Edge Router
MPLS Network
(LER)
Existing ATM
Network
ATM Switch
ATM Switch
Pseudowire
PSN Tunnel
8
ATM to MPLS Interworking Standards
MPLS/FR Alliance - Integrated Model, Option #2
• Adds a third network element – a hybrid that combines both
switching and routing.
– Requires a router in the core of the network.
– Three box solution, requires significant incremental investment.
– Separate network management systems must be integrated.
Three Boxes Needed in
Network
Existing ATM
Network
Label Edge Router
(LER)
ATM Switch
Label Edge Router
MPLS Network
(LER)
Existing ATM
Network
ATM Switch
160G+ New Hybrid
Network Element
9
ATM to MPLS Interworking Standards
MPLS/FR Alliance Distributed Model, Option #3
Based on Lucent - Juniper Multiservice MPLS Solution, Available Today
•
Distributed functionality on existing ATM switches, and Routers - allows
service provider to leverage existing assets with minimal incremental
investment.
– Preserves ATM functions on the ATM switch (requires limited software
upgrades to existing switches), and the routing functions on the router.
• MPLS router (LER) is not needed to support ATM signaling and routing, or
interwork individual VCs or VPs.
• ATM switches aggregate VPs into a Virtual Trunk before sending to MPLS
router .
ATM Switches aggregate
connections
Virtual Trunk
Existing ATM
Network
ATM Switch
Aggregation
Point #1
Administrative separation
between ATM and MPLS
Existing ATM
Network
MPLS Network
MPLS Router
MPLS
(LER)
Router
Aggregation
Point #2
ATM Switch
(LER)
10
ATM to MPLS Interworking Standards:
Signaling and Data Plane Scaling Issues
Existing Networks
Issue: 1:1 VC/VP to LSP Mapping
Requires interworking
each ATM VP with each
MPLS path
• 1:1 VP to LSP association
requires interworking each ATM
VP with a single MPLS path.
• Creates signaling and data
plane scalability issues.
CBR VP
1 mbps
VBR rt VP
5 mbps
VBR nrt VP
10 mbps
30 mbps
UBR VP
LSP
ATM Interface
On Switch
POS Interface
on Router
11
ATM to MPLS Interworking Standards:
Solving Signaling Scalability
New Standards Progress with Virtual Trunks
Solution:
• Perform VP bundling to aggregate
ATM VPs into an ATM Virtual Trunk
before sending to the LER.
• Simplify scaling of ATM VPs across
MPLS core.
• Groom 1000’s of VCs into virtual
trunks for transport across MPLS
core.
New Standards
progress:
Virtual Trunk Concept
Aggregation of 1000’s
VPs into Virtual trunks
with automatic
provisioning
CBR VP
1 mbps
VBR rt VP
5 mbps
VBR nrt VP
10 mbps
30 mbps
UBR VP
Virtual
Trunk
ATM Interface
On Switch
LSP
POS Interface
on Router
12
Lucent/Juniper Multiservice MPLS Core Solution
Delivering ATM QoS and SLAs
– Bundles ATM QoS priorities into single Trunk VPN label/Pseudo Wire
– QoS treatment of traffic Emulates ATM
– Facilitates bandwidth sharing amongst service classes
– Maintains cell loss priority
QoS Flows Based
on EXP Bits
MPLS Label
CBR
20
LABEL
3
1
8
Exp
S
TTL
VBR rt
VBR nrt
32 bits = 4 bytes
(octets)
ABR/UBR
Queues
PE to PE E-LSPs
(PSN Tunnel)
Trunk VPN Label
(Pseudo Wire)
POS Interface (Router)
13
ATM to MPLS Interworking Standards:
Routing Scaling Issues
Existing Networks Require Full Mesh ATM Routing
Across MPLS Core
ATM switches support a limited number of
adjacencies, limiting scalability.
Frame/ATM
Edge
Issue: Connecting large numbers of
ATM sub networks over an MPLS core.
• Must transport ATM routing information
through an MPLS network.
• ATM switches need to maintain routing
adjacencies with all other ATM
switches through MPLS core.
Frame/ATM
Edge
Frame/ATM
Edge
IP/MPLS Core
Frame/ATM
Edge
Frame/ATM
Edge
Frame/ATM
Edge
Frame/ATM
Edge
Frame/ATM
Edge
14
ATM to MPLS Interworking Standards:
Solving Routing Scaling Issues
New Standards Progress with MP-BGP
Solution: Use Multiprotocol-Border
Gateway Protocol (MP-BGP) for ATM
address reachability information
• Enables ATM network to import and
export ATM address information through
the MPLS core by exchanging information
with a single edge router
• Increases scalability by reducing ATM
adjacencies without sacrificing full
connectivity
• Utilizes MP-BGP’s proven scalability for
IP VPNs and Internet routing
• Simplifies administration by leveraging
one protocol (BGP) for multiple services
New Standards progress:
MP-BGP to distribute
ATM routing information
MP-BGP distributes
ATM address
Information
Frame/ATM
Edge
Frame/ATM
Edge
Frame/ATM
Edge
IP/MPLS Core
Frame/ATM
Edge
Frame/ATM
Edge
Frame/ATM
Edge
Frame/ATM
Edge
Frame/ATM
Edge
15
Lucent - Juniper Partnership
Unified Standards Efforts,
Unified Solutions
MPLS/FR Alliance Distributed Model for
ATM to MPLS Interworking increases
scalability and manageability by:
– Separating ATM signaling from the
MPLS network to achieve higher
scalability
– Giving providers a solution for
aggregating ATM traffic over the MPLS
network
Lucent –Juniper Standards Based ATM to MPLS
Interworking
FR, ATM
Services
Virtual
Trunk
MP-BGP for ATM
routing information
Services
T-series
T-series
CBX 500
Distributed
Architecture FR, ATM
M320
CBX 500
– Distributing ATM address information in
a scalable fashion
M/E
M/E
CBX 3500
GX 550
Release 2 of Multiservice MPLS Solution
architected to fully realize ATM to MPLS
interworking standards
– Solution also allows service providers to
maintain standard ATM and MPLS
service restoration and fault
management tools
Lucent and Juniper together will promote
progress to other standards bodies
including IETF, ITU-T for adoption
IP Services
IP Services
Ethernet
Services
Ethernet
Services
Lucent OSS Software
16
Poll #2: What is your top concern with respect to
deploying standards-based ATM to MPLS?
A. Preserving quality of service over the MPLS core
B. Scaling ATM connections over the MPLS core
C. Dynamic signaling between the ATM and MPLS networks
D. Preserving network reliability end to end
17
Standards Enable Convergence Today
Converge the Best of Both Worlds to Profit
Today and Tomorrow
•Standards minimize OPEX by preserving established network
management processes; reduces incremental CAPEX
– MPLS/FR Alliance Distributed Model maximizes the utility of existing
assets and separates ATM and MPLS operational boundaries.
•Standards maintains QoS in a scalable fashion through the IP/MPLS
core; preserves operational parity between ATM and IP/MPLS domains
– Use of Virtual Trunks improves network scalability and simplifies the
provisioning process.
•Standards ensure reliable control plane operations by standardizing on
a common protocol for address distribution
– Advancements in standards such as MP-BGP solve routing scalability
issues.
18
Questions & Answers
John Sax, CTO, Data Networking Group, Lucent Technologies
Dr. Kireeti Kompella, Distinguished Engineer, Juniper Networks
Mark Bieberich, Program Manager, The Yankee Group