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Transcript of © 2010 Tata Communications Ltd., All Rights Reserved Presented by © 2010 Tata Communications Ltd.,...
© 2010 Tata C
omm
unications Ltd., All R
ights Reserved
Presented by
© 2010 Tata C
omm
unications Ltd., All R
ights Reserved
Tata Communications’ Ethernet Evolution
PBB Technical Presentation
© 2010 Tata C
omm
unications Ltd., All R
ights Reserved
• A universal protocol understood by all IT professionals
• Greater flexibility allows faster upgrades with no interruptions to the network
• Customers now only have to plan 30 days in advance using Ethernet, instead of months in advance using other technologies
• Customer trusts using Layer 1, however, needs latency or jitter or packet loss SLA guarantees, available with Ethernet
• Purchase the exact bandwidth required
• Lower port costs and greater port flexibility
Why Ethernet is growing?
WAN Ethernet 2
Lower costs
Data SLA’s with L1 confidence
Easy Scalability and Reduced Risk
Familiarity
© 2010 Tata C
omm
unications Ltd., All R
ights Reserved
MEF 9 and MEF 14 certified services• Priority Ethernet (all configurations)
• Dedicated Ethernet (all configurations)
Owned cables• Enables Tata Communications to sell
up to 10 Gig Ethernet
• More control because Tata Communications controls everything down to the cable
Power of choice• More services: Point to Point, Point
to Multipoint, Multipoint
• More variety• CoS or Transparent Pipes;• Ring protection or mesh
protection; • Standard 1518 byte frame sizes
or 9000 byte (jumbo) frames
India Presence and Global reach• 120+ PoPs and extensive fiber
built in major cities
• Largest Global Footprint
What makes Tata Communications’ Ethernet Offering unique?
Market Leader
WAN Ethernet 3
© 2010 Tata C
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unications Ltd., All R
ights Reserved
• Global Dedicated Ethernet ( GDE)
• National Dedicated Ethernet ( NDE)
• Global and National Priority Ethernet
• Global Priority Stretch
• 10 Gig-E Service
WAN Ethernet Portfolio
Point to Point Point to Multipoint
• Global and National Priority Ethernet
Multipoint
• VPLS
• Dedicated Multipoint
Options
• Enterprise SLA Option (ESO)
• Sub 10 Gig Ethernet
• Low Latency
• Protected ports
• Dual local loops
• Burstability
New
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
5
Global Ethernet Network
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
Why Next Generation Ethernet (NGE)?
6
• Multipoint services are predicted to make up 40% of the total demand in 5 years
• Greater service (e.g., MAC, BW and services) scalability to address increasing customer demand
• Improve OAM capability to monitor and maintain services proactively
• Consistent services on a converged network
• Enhance ENNI capability
• More granular traffic manageability
WAN Ethernet
© 2010 Tata C
omm
unications Ltd., All R
ights Reserved
Carrier Ethernet with IEEE 802.1ad – Present Technology
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• Key for customer traffic separation and network traffic engineering
• Multipoint services based on VLAN switching
• Contains broadcast functions like unknown unicast flooding and multicast/broadcast propagation
Problem : The Service Provider still has to use a customer’s MAC addresses to learn and switch traffic through their network. This causes large MAC tables in the SP core and also makes the core susceptible to DoS (purposely flooding the network with Ethernet frames to fill learning tables).
WAN Ethernet
© 2010 Tata C
omm
unications Ltd., All R
ights Reserved
IEEE 802.1ah (PBB) is a Natural Ethernet Progression
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B-DA(6B)
B-SA(6B)
BTAG E-type0x88a8/0x81
00(2b)
BTAG-TCI(2B)
ITAG E-type0X88e7
(2B)
ITAG-TCI(4B)
Client Data B-FCS
VID(12 bits)
DEIPCP
(3 bits)PCP
(3 bits)DEI
RES(2 bits)
I-SID(24 bits)
BTAG TCI Format ITAG TCI Format
22 Bytes
PCP – 3 bits of PriorityCFI – 1 bit Canonical
Format IndicatorDEI – 1 bit Drop Eligibility
IndicatorRES – 2 bits ReserveI-SID – 24 bits Service IndicatorC-DA – encapsulated customer DAC-SA – encapsulated customer SAVID – VLAN IdentifierTCI – Tag Control InformationFCS – Frame Check Sequence
Another VLAN, called a Backbone VLAN (or B-VID), is responsible for defining the Backbone domain. The B-VID is the “highway” all B-MACs travel on; no B-VID, no PBB connectivity.
Greater scalability is also provided using a larger Instance-Service ID, or I-SID instead of a VLAN. When a customer’s frame (with or without C-VID) or SP’s S-VID enters the PBB domain, it is assigned and equated to one of the 16.7 million available I-SIDs.
To solve the MAC address problem, (customer MAC addresses in SP network), PBB’s encapsulation method adds another level of MAC addresses to forward traffic through an Ethernet-switched network. This new level of MAC addresses, called Backbone-MACs (or B-MACs), exist and function ONLY within a PBB domain and are simply the “backbone” facing switch ports.
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
• TDM • VPLS/H-
VPLS• MPLS-TP • PBB
How PBB was chosen for the core of Next Generation Ethernet (NGE) network?
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Technology Options for core network and metro
There is significant benefit to deploy the same technology between core and metro
• Robust network interconnection between core and metro• Monitoring and OAM capability throughout the network end-to-end • Flexible traffic management capability end to end• Ability to monitor each individual service and provide improved SLAs
WAN Ethernet
© 2010 Tata C
omm
unications Ltd., All R
ights Reserved
How PBB Was Chosen for the Second Generation Tata Communications’ Ethernet Network?
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There is significant benefit to deploy the same technology between core and metro
• Robust network interconnection between core and metro• Service and MAC scalability throughout the global network• Ability to monitor each individual service and provide improved SLAs • Monitoring and OAM capability throughout the network end-to-end
Time-To-Market -PBB is a mature and standardized (802.1ah) technology.-Tata Communications required a mature technology for its global network.-Tata Communications decided not to wait a few more years for other technologies to mature.
• Tata is working with vendors to develop a “thin” control plane; e.g., Shortest Path Bridging• PBB will stay as a long-term solution with multiple applications. Many vendors are working to enhance/include the
technology in their product portfolio. PBB and MPLS-TP will coexist.
WAN Ethernet
© 2010 Tata C
omm
unications Ltd., All R
ights Reserved
Tata Communications PBB Network Uses Cisco ASR 9000
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Initially, the switch capacity is 640G, 180G/slot, 512,000 MAC Addresses
• Hardware upgradable to • 3.2T, 400G/slot, • 1,000,000 MAC
Addresses
Tata Communications has chosen the “Cisco ASR 9000” for the Second generation Carrier Ethernet core network
• ASR 9010 with 10 slots or ASR 9006 with six slots
• Line cards are either: 8x10GE (WAN or LAN) or 40xGE
• Full port capacity/Non-blocking/No need for oversubscription
Cisco ASR 9000 uses the new IOS-XR release 3.9.1+ (and later) to support PBB
• Both HW and SW are optimised to support PBB
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
• Global connections• Inter-region connections• Regional to core connections
Hierarchical Network Architecture
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Hierarchical network topology consists of:
Protection within the Core
• Layer 1• Link aggregation• MSTP/ MST-AG – contained within
region
Protection between regional and core networks
• Link Aggregation• Dual homing using MSTP/ MST-AG
Creating regional protection groups in a global network
• Use regional B-MAC addressing scheme
• Use Access Control List for global loop avoidance
WAN Ethernet
© 2010 Tata C
omm
unications Ltd., All R
ights Reserved
Global Double Ring Architecture
• Dual nodes in each region provide nodal redundancy to regional feeder networks
• Regional MSTP with simple topology makes performance predictable• Global MSTP makes network
performance unpredictable - conversion time for protection
• MSTP flooding is supported for different regional MSTP entities, which keep the different regions separate
WAN Ethernet
© 2010 Tata C
omm
unications Ltd., All R
ights Reserved
Tata Communications - NGE International Physical Connectivity
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• Core nodes around the globe with a minimum of two nodes per continent
• Cables with lowest latency selected for Core-Core and Regional-Core connections
• Regional nodes connect to multiple Core nodes
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
Tata Communications – NGE Resilient Network
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C1 – Site BC1 – Site A
Failure
LAG protects against failures between Core and
Regional
Tertiary protection via L2 Protocols (MSTP/MSTP-AG)
Nodal Failure
Nodal Resiliency for Pass-Through Traffic(MTSP/MST-AG)
Nodal Resiliency for Pass-Through Traffic(MTSP/MST-AG)
Nodal Resiliency for Pass-Through Traffic(MTSP/MST-AG)
Nodal Failure
C2 – Site B C2 – Site AC3 – Site B C3 – Site A
Double Failure
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
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16WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
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© 2010 Tata C
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unications Ltd., All R
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18WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
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© 2010 Tata C
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unications Ltd., All R
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20WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
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© 2010 Tata C
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unications Ltd., All R
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© 2010 Tata C
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unications Ltd., All R
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© 2010 Tata C
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unications Ltd., All R
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24WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
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25WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
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26WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
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© 2010 Tata C
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© 2010 Tata C
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© 2010 Tata C
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unications Ltd., All R
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© 2010 Tata C
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unications Ltd., All R
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DUAL Homing Scenarios – Interconnection with Aggregation Network
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•MSTP at the aggregation node
•MST-AG at ASR
•MC LAG - Future
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
MAC Address Learning in PBB – Additional Security
• Learns and forwards based on B-MAC addresses only
32
Edge Bridge Domain (EBD): Core Bridge Domain (CBD):
• Learns and forwards based on customer MAC addresses
• Maintains a forwarding MAC table of C-MAC/B-MAC relationship
• Performs PBB encapsulation
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
Ethernet Service Mapping and Bundling
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• S-VLANs from access/aggregation mapped or bundled into I-SIDs on EBDs • I-SID provides service identification in PBB network• I-SIDs bundled into B-VLANs for transport over PBB core• B-VLAN defines transport topology in PBB network • Both I-SIDs and B-VLAN are statically preconfigured for traffic engineering purpose
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
Tata Communications Carrier Ethernet Roadmap
Near term additional features• Layer 2 linear protection using G.8031• Layer 2 ring protection using G.8032• Dual homing using MC LAG• Seamless access/metro/regional/core global
network
Long term vision• Control plan• Converged transport network
34
Not all problems have a technological answer, but when they do, that is the more
lasting solution
- Andrew GroveCofounder of Intel
““
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
PBB – a Better Ethernet Network For Your Future
• PBB is a mature technology being adopted by many equipment vendors• PBB solves many scalability issues existing on today’s equipment • PBB enhanced network security
• Tata Communications has adopted PBB for its global network to deliver better services to our customers
• More flexibility– Pick your path– Deterministic protection
• Higher quality– Monitoring the customer service independently– Nodal diversity
• Expanding service options– Burstability– Sub 10 Gig E (1,000–10,000 Meg in 500 Meg increments)– Dual local loops
35
As we go forward, I hope we’re going to continue to use technology to make really big differences in how people live
and work
- Sergey BrenCofounder of Google
““
PBB is a future-proof technology, and the
Future is Now!
© 2010 Tata C
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unications Ltd., All R
ights Reserved
Next Generation Ethernet will benefit our customers
How do customers benefit?• Higher quality: Global Core layer delivers 99.995% availability
• Nodal Diversity: Global Core layer designed to protect against complete nodal failure
• More features:
• Sub-10 Gig E allows bandwidth flexibility between 1,000 – 10,000 Meg
• Shortest path, global multipoint services for delivering the best global LAN
• Low latency network for latency sensitive applications
• Protected ports for higher availability
• Dual local loops for higher availability
• Burstable service to handle unexpected surges in usage for greater flexibility
• Deterministic protection as an alternative to mesh
• Security to ensure data is only viewed by the intended audience
36
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
Other benefits of the Next Generation Ethernet
• Multipoint• Global Ethernet Market in 5 years = $40 Billion• 40% of service provider business expected to be Multipoint• PBB (802.1ah) is a multipoint technology• Is the most efficient Ethernet technology for delivering multipoint
• Scalability is greater• 16.7 Million services• 240 Gig per box
• Greatly reduced cost structure• Nodal diversity
• Layer 1• Link aggregation• MSTP/ MST-AG – contained within region
• Strong roadmap• G8031 for greater path flexibility• Service level monitoring
37
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
Tata Communications vs. Other Providers
38
Largest “on-net” footprint
Award Winning Service
Cutting edge technology
delivering cutting edge services
High qualityGlobal presence, Cable ownership
Customer premise to Customer
premise monitoring
WAN Ethernet
© 2010 Tata C
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unications Ltd., All R
ights Reserved
Thank You
© 2010 Tata C
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unications Ltd., All R
ights Reserved
39WAN Ethernet
Email us: [email protected] Visit us: www.tatacommunications.com/vpn/pbbknowledgecentre.asp