Co-ordination Between Segment Protection and Global Protection

Co-ordination Between Segment Protection and Global Protection - Description

M Vinod Kumar. Abhay Karandikar. Version 1.0. Infrastructure Segment Protection. ISP Not Required; . Only Global Protection (GP) . Needed. ISP Required. ISP without GP. ISP with GP. Alan McGuire’s (BT) . ID: 795238 Download

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Co-ordination Between Segment Protection and Global Protection

M Vinod Kumar. Abhay Karandikar. Version 1.0. Infrastructure Segment Protection. ISP Not Required; . Only Global Protection (GP) . Needed. ISP Required. ISP without GP. ISP with GP. Alan McGuire’s (BT) .

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Presentation on theme: "Co-ordination Between Segment Protection and Global Protection"— Presentation transcript:

Slide1

Co-ordination Between Segment Protection and Global Protection

M Vinod Kumar

Abhay Karandikar

Version 1.0

Slide2

Infrastructure Segment Protection

ISP Not Required;

Only Global Protection (GP)

Needed

ISP Required

ISP without GP

ISP with GP

Alan McGuire’s (BT)

Requirement

First ISP and then GP

Certain TESI is outside the scope of ISP; Only GP for them

Need a mechanism to identify ite.g. MST-ID

Fixed Timer

Coordination or Feedback Based Timer

GP Timer > ISP Timer

Efficient and Reliable

Case 1

Case 2

Case 3

Case 3b

Case 3a

Case 3a FT

Case 3a C or FBT

4/8/2009

2

Tejas Networks Ltd

Slide3

Case 1

Infrastructure Segment Protection not required; only Global Protection

BEB1

SEB1

SEB2

BEB2

N1

N2

Work TESI

Protect

TESI

Bridge

Link

4/8/2009

3

Tejas Networks Ltd

Slide4

Case 2

Only Infrastructure Segment Protection required but

NO Global Protection

BEB1

SEB1

SEB2

BEB2

N1

N2

Work TESI CCM

Bridge

Link

Work ISP CCM

Protect

ISP CCM

4/8/2009

4

Tejas Networks Ltd

Slide5

Case 3

Infrastructure Segment Protection with Global Protection

BEB1

SEB1

SEB2

BEB2

N1

N2

Work TESI CCM

Protect

TESI CCM

Bridge

Link

Work ISP CCM

Protect

ISP CCM

Pre-Provisioning of Work TESI/ CCM

4/8/2009

5

Tejas Networks Ltd

Slide6

Observation

Among the 3-cases depicted only case-3 needs extra care

We consider first Case 3b and then Case 3a

4/8/2009

6Tejas Networks Ltd

Slide7

Case 3b

TESI

is outside the scope of Infrastructure Segment Protection

Could use different MST-ID

BEB1

SEB1

SEB2

BEB2

N1

N2

Work TESI CCM

Protect

TESI CCM

Bridge

Link

Work ISP CCM

Protect

ISP CCM

Pre-Provisioning of Work TESI/ CCM

4/8/2009

7

Tejas Networks Ltd

Slide8

Case 3a Fixed Timer

Infrastructure Segment Protection with Global Protection

If link SEB1-SEB2 fails, Segment Protection should be done before Global Protection

So HoldOffTimer T2>T1, How do we set this? How large should be T2?This will slow the Global Protection. Not reliable.

So Case 3a Coordination or Feedback Based Timer is ideal

BEB1

SEB1

SEB2

BEB2

N1

N2

Work TESI CCM

Protect

TESI CCM

Bridge

Link

Work ISP CCM

Protect

ISP CCM

Pre-Provisioning of Work TESI/ CCM

T1

T2 > T1

4/8/2009

8

Tejas Networks Ltd

Slide9

Case 3a Coordination or Feedback

Infrastructure Segment Protection with Global Protection

If link SEB1-SEB2 fails, then SEB1 and SEB2 will coordinate with BEB1 and BEB2 informing that ISP will handle the fault

BEB1

SEB1

SEB2

BEB2

N1

N2

Work TESI CCM

Protect

TESI CCM

Bridge

Link

Work ISP CCM

Protect

ISP CCM

Pre-Provisioning of Work TESI/ CCM

Feedback

Feedback

4/8/2009

9

Tejas Networks Ltd

Slide10

Conclusion

Coordination is a mandatory requirement in Case 3a

Will increase reliability and speed.

4/8/2009

10Tejas Networks Ltd

Slide11

Thanks

4/8/2009

11

Tejas Networks Ltd