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MPLS Traffic-EngineeringFailure and Recovery Example (continued) – IGP-based• Node C (and node Z) will be the first to recalculate its routing table and update itsforwarding table (step 4).• In the meantime, Node A does not know that the link is down yet and keeps sendingtraffic destined to node Z to Node C. Given that node C has completed step 4, itnow believes (quite correctly) that the best path to Z is via node A. BUT – node Astill believes that the best path to node Z is via node C so it sends the traffic rightback to node C. We have a transient loop (micro-loop) ….• The loop resolves itself as soon as node A updates its forwarding table but in themeantime, valuable packets have been dropped10B20A10ZDirection of traffic flow10CSLIDE 70COPYRIGHT © 2012 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
MPLS Traffic-EngineeringFailure and Recovery Example (continued)• Node A and all other nodes eventually update their forwarding tables andall is well again.• But the damage is already done. . .10B20Direction of traffic flowA10Z10CSLIDE 71COPYRIGHT © 2012 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
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MPLS-based Metro Ethernet NetworksA
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1. IntroductionSLIDE 3COPYRIGHT ©
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2. Introduction to Metro Ethernet S
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Introduction to Metro Ethernet Serv
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2.3 Carrier Ethernet Services defin
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MEF Carrier Ethernet TerminologyThe
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MEF Carrier Ethernet Terminology•
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MEF Carrier Ethernet TerminologyEth
Page 20 and 21: Basic Carrier Ethernet ServicesE-LI
Page 22 and 23: Services Using E-Line Service TypeE
Page 24 and 25: Services Using E-LAN Service TypeEt
Page 26 and 27: Audience Question 1Name any two of
Page 28 and 29: Agenda3. Traditional Metro Ethernet
Page 30 and 31: 3.1 Service IdentificationSLIDE 30C
Page 32 and 33: Traditional Metro Ethernet Networks
Page 34 and 35: 3.2 Forwarding MechanismSLIDE 34COP
Page 38 and 39: 3.3 Resiliency and RedundancySLIDE
Page 44 and 45: 3.4 Recent DevelopmentsSLIDE 44COPY
Page 46 and 47: Provider Backbone Bridging (PBB)Eth
Page 48 and 49: 802.1ah Provider Backbone Bridge En
Page 50 and 51: Shortest Path BridgingHow it works:
Page 52 and 53: Shortest Path Bridging - SPT Exampl
Page 56 and 57: Audience Question 3What is the size
Page 58 and 59: Agenda4. Delivering Ethernet over M
Page 60 and 61: Delivering Ethernet over MPLSMPLS A
Page 62 and 63: MPLS VirtualisationThe virtualisati
Page 64 and 65: MPLS ScalabilityMPLS Scalability:
Page 66 and 67: MPLS Traffic-EngineeringThe IGP-bas
Page 68 and 69: MPLS Traffic-EngineeringRecovery fr
Page 72 and 73: MPLS Traffic-EngineeringRecovery fr
Page 74 and 75: MPLS Traffic-EngineeringFailure and
Page 76 and 77: 4.2 The Pseudowire Reference ModelS
Page 78 and 79: PWE3 Reference ModelGeneric PWE3 Ar
Page 80 and 81: Pseudowire Protocol LayeringPseudow
Page 82 and 83: Ethernet Virtual Private Wire Servi
Page 84 and 85: PWE3 Reference Model for Ethernet V
Page 86 and 87: Ethernet VPWS Example 1Example 1: E
Page 88 and 89: Ethernet VPWS Example 2Example 2: E
Page 94 and 95: Audience Question 5What protocol is
Page 96 and 97: Ethernet Virtual Private LAN Servic
Page 98 and 99: VPLS BenefitsBenefits for the custo
Page 100 and 101: VPLS Topological ModelTopological M
Page 102 and 103: VPLS PE FunctionsProvider Edge Func
Page 104 and 105: VPLS SignallingVPLS Mechanics:• B
Page 106 and 107: VPLS SignallingA full mesh of pseud
Page 108 and 109: VPLS Pseudowire SignallingEthernet
Page 110 and 111: VPLS Pseudowire SignallingEthernet
Page 112 and 113: Ethernet VPLS Signalling ExamplePE1
Page 114 and 115: VPLS Packet Walkthrough and MAC Lea
Page 116 and 117: 4.5 Scaling VPLSSLIDE 116COPYRIGHT
Page 118 and 119: Hierarchical VPLSHow is a spoke use
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Scalability: ReplicationFlat archit
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Topological Extensibility: Metro In
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4.6 VPLS TopologiesSLIDE 124COPYRIG
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Topologies: HierarchicalPE-1PE-2PE-
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Topologies: RingA full mesh would h
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Agenda4.7. Resiliency Mechanisms4.7
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Multi-chassis LAG: What is it ?Stan
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Multi-chassis LAG: How does it work
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Redundancy at the VPLS edge: MC-LAG
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4.7.3 Pseudo-wire Redundancy with M
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Combining MC-LAG with Pseudowire Re
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Multi-chassis LAG with PW Redundanc
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Multi-chassis LAG with Pseudo-Wire
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Multi-chassis LAG with PW Redundanc
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Multi-segment Pseudo-wire - Motivat
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Multi-segment Pseudo-wire - How do
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5. SummarySLIDE 152COPYRIGHT © 201
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6. Questions ???SLIDE 154COPYRIGHT
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www.alcatel-lucent.comSLIDE 156COPY
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