Protection switching for point to multipoint tesi
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Protection Switching for Point to Multipoint TESI. Dr. Abhay Karandikar A Jishnu, M Vinod Kumar. Introduction. Qay has P2P 1:1 protection mechanism P2MP protection mechanism is pending This presentation describes protection switching requirements for P2MP . PBB-TE Network Topology. BEB1.

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Protection switching for point to multipoint tesi

Protection Switching for Point to Multipoint TESI

Dr. Abhay Karandikar

A Jishnu, M Vinod Kumar


Introduction
Introduction

  • Qay has P2P 1:1 protection mechanism

    • P2MP protection mechanism is pending

  • This presentation describes protection switching requirements for P2MP


Pbb te network topology
PBB-TE Network Topology

BEB1

BCB1

BEB2

BCB2

Link

BCB3

BEB3


P2mp work tesi
P2MP work TESI

BEB1

BCB1

BEB2

BCB2

Link

BCB3

BEB3

Work


Concept
Concept

  • PBB-TE MA enhanced with MD levels

  • Switchover is performed first in the lowest MD level

    • If switchover fails within an MD level then switchover is performed in the next higher MD level

    • Switchover is locked-out in higher MD level using LockOutProtection (LoP)


P2mp protection segment 1
P2MP Protection: Segment 1

BEB1

BCB1

BEB2

BCB2

Link

BCB3

BEB3

Work

Protect


P2mp protection segment 2
P2MP Protection: Segment 2

BEB1

BCB1

BEB2

BCB2

Link

BCB3

BEB3

Work

Protect


P2mp protection segment 3
P2MP Protection: Segment 3

BEB1

BCB1

BEB2

BCB2

Link

BCB3

BEB3

Work

Protect


P2mp tesi protection
P2MP TESI Protection

BEB1

BCB1

BEB2

BCB2

Link

BCB3

BEB3

Work

Protect


Hpd for segment 1
HPD for Segment 1

Protected Domain 1 => MD Level 1

Protected Domain 0 => MD Level 0

BEB1

BCB1

BEB2

BCB2

Link

BCB3

BEB3


Hpd for segment 2
HPD for Segment 2

Protected Domain 1 => MD Level 1

Protected Domain 0 => MD Level 0

BEB1

BCB1

BEB2

BCB2

Link

BCB3

BEB3


Hpd for segment 3
HPD for Segment 3

Protected Domain 1 => MD Level 1

Protected Domain 0 => MD Level 0

BEB1

BCB1

BEB2

BCB2

Link

BCB3

BEB3


Hpd implementation
HPD implementation

Protected Domain 1 => MD Level 1

Protected Domain 0 => MD Level 0

BEB1

BCB1

BEB2

BCB2

w

w

p

p

p

p

Link

BCB3

BEB3

Work

Protect

-MEP

CCM

-MIP


Fault in mdl 0
Fault in MDL = 0

Protected Domain 1 => MD Level 1

Protected Domain 0 => MD Level 0

LoP=1

BEB1

BCB1

BEB2

BCB2

w

w

LoP=1

p

p

LoP=1

p

p

Link

BCB3

BEB3

Work

Protect

-MEP

CCM

-MIP


Switchover in mdl 0
Switchover in MDL = 0

Protected Domain 1 => MD Level 1

Protected Domain 0 => MD Level 0

BEB1

BCB1

BEB2

BCB2

w

w

p

p

p

p

Link

BCB3

BEB3

Work

Protect

-MEP

CCM

-MIP


Benefits
Benefits

  • Simple to understand, to implement and to provision

  • Other TESIs will be less affected by the switchover

  • Has less stringent requirement on the network resources

  • Some path segments need not be protected

  • Node protection can be handled

    • Node failure is similar to atleast two link failure

  • Leads to unified framework for link protection within a single PBB-TE domain

  • Leads to unified framework for protection across multiple PBB-TE domains


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