Oam domain configuration using garp generic oam registration protocol gorp
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OAM Domain configuration using GARP (Generic OAM registration protocol - GORP ). David Elie-Dit-Cosaque, Kamakshi Sridhar, Maarten Vissers, Tony Van Kerckhove. Why automatic configuration of OAM domain?. Large number of flow points to configure prone to human errors Dynamic conditions

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OAM Domain configuration using GARP (Generic OAM registration protocol - GORP )

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Oam domain configuration using garp generic oam registration protocol gorp

OAM Domain configuration using GARP (Generic OAM registration protocol - GORP)

David Elie-Dit-Cosaque, Kamakshi Sridhar, Maarten Vissers, Tony Van Kerckhove


Why automatic configuration of oam domain

Why automatic configuration of OAM domain?

  • Large number of flow points to configure

    • prone to human errors

  • Dynamic conditions

    • MP’s may be added or deleted

    • Spanning tree changes

Bridge

Spanning tree

branch

LP

MP

Upper level LP

Need for Dynamic Configuration of the OAM domain.

We propose GARP OAM Registration protocol (GORP)


Gorp garp oam registration protocol basics

GORP(GARP OAM Registration Protocol) Basics

  • GARP application

  • Similar to GVRP

  • New attributes = OAM levels

  • Just like in GVRP:

    • GORP requires manual placement of at least two MPs to define an OAM domain

    • Enables Dynamic placement and Level assignment of all other LP’s

    • GVRP pruning can be translated to GORP pruning-> Increased security

GORP brings plug and play and security to OAM domain configuration


Level determination of lp s using gorp

LP1

LP2

MP2

MP1

20

20

20

20

Lower Level

attribute registration

triggers changes of level

MP3

LP3

LP4

LP5

LP6

MP4

11

11

11

11

11

11

11

11

MP5

MP6

LP7

LP8

9

9

9

9

Level determination of LP’s using GORP

  • GORP: Each level is configured one at a time.

  • GORP: The order in which levels are configured does not matter.

  • Local decision:

    • Every activated LP must pick minimum{level#1, … level # k}

Customer Level

Provider Level

Operator Level

Physical Level ports

P1

P2

P3

P4

P6

P7

P8

P5


Gorp mechanism placement of lp s and setting their levels

Manually configured MP

D

OAM1

D

2

2

2

2

2

2

2

1

1

1

1

1

1

1

3

3

3

3

3

3

3

4

4

4

4

4

4

4

GORP mechanism (placement of LP’s and setting their levels)

OAM1

D

OAM1

R

B3

OAM1

D

OAM1

D

OAM1

D

OAM1

D

B2

OAM1

D

OAM1

R

OAM1

D

OAM1

R

B5

OAM1

D

OAM1

D

OAM1

D

OAM1

R

OAM1

D

OAM1

D

OAM1

R

B1

B4

OAM1

D

OAM1

R

B7

OAM1

D

OAM1

D

OAM1

D

OAM1

D

B6

OAM1

D

OAM1

D

R: registered

D: declared

OAM1

D

OAM1

D


Gorp mechanism placement of lp s and setting their levels1

OAM1

RD

Port with auto-

configured LP

Manually configured MP

OAM1

RD

Port with manually

configured MP

D

2

2

2

2

2

2

2

1

1

1

1

1

1

1

OAM1

RD

3

3

3

3

3

3

3

4

4

4

4

4

4

4

OAM1

RD

OAM1

RD

OAM1

RD

OAM1

DR

OAM1

DR

OAM1

DR

GORP mechanism (placement of LP’s and setting their levels)

OAM1

RD

OAM1

R

OAM1

D

OAM1

D

B3

OAM1

DR

OAM1

D

OAM1

D

OAM1

D

OAM1

DR

OAM1

D

OAM1

D

OAM1

D

B2

OAM1

D

OAM1

D

OAM1

R

OAM1

RD

OAM1

RD

OAM1

R

OAM1

D

OAM1

D

B5

D

OAM1

D

OAM1

DR

OAM1

D

OAM1

D

OAM1

DR

OAM1

D

OAM1

D

OAM1

R

OAM1

D

OAM1

D

OAM1

R

B1

B4

OAM1

D

OAM1

R

B7

OAM1

D

OAM1

D

OAM1

D

OAM1

D

B6

OAM1

D

OAM1

D

R: registered

D: declared

OAM1

D

OAM1

D


Gorp pruning

GORP pruning

  • Just like GVRP pruning, can do GORP pruning.

  • GORP pruning results in:

    • Automatic placement of MP’s wherever required

  • Benefits:

    • Automatic MP’s will plug in holes in the OAM domain.

    • Thus, Missing MP’s will not result in security leaks


Gorp pruning1

GORP pruning

Dynamically

created MPs

Missing MP

MP

MP5

Manually

created MPs

MP

MP1

MP3

MPb

MPa

Provider Level

MP2

LP

MP4

MP6

Customer Level

GORP dynamic placement of MPs prevents OAM frames from leaking outside the OAM domain


New manual or repaired mps

New manual (or repaired) MPs

Dynamically

created MPs

New MP

MP

MP5

Manually

created MPs

MP

MP1

MP3

MPb

MPa

Provider Level

MP2

MP4

MP6

Customer Level

New manual MP’s installed: existing MP’s will be removed.


Gorp pruning placement of boundary mp s

OAM1

RD

Port with auto-

configured LP

Manually configured MP

OAM1

RD

Port with manually

configured MP

OAM1

DD

Port with auto-

configured MP

D

2

2

2

2

2

2

2

1

1

1

1

1

1

1

OAM1

RD

3

3

3

3

3

3

3

4

4

4

4

4

4

4

OAM1

DR

OAM1

RD

OAM1

RD

OAM1

DR

OAM1

DR

OAM1

RD

GORP pruning (placement of boundary MP’s)

OAM1

D

OAM1

RD

OAM1

R

OAM1

D

OAM1

D

B3

OAM1

DR

OAM1

D

OAM1

D

OAM1

D

OAM1

D

OAM1

D

OAM1

DR

OAM1

D

OAM1

D

OAM1

D

B2

OAM1

D

OAM1

D

OAM1

D

OAM1

R

OAM1

RD

OAM1

RD

OAM1

R

OAM1

D

OAM1

D

OAM1

D

B5

D

OAM1

DR

OAM1

D

OAM1

D

OAM1

D

OAM1

D

OAM1

DR

OAM1

D

OAM1

D

OAM1

R

OAM1

D

OAM1

D

OAM1

R

B1

B4

OAM1

D

OAM1

R

B7

OAM1

D

OAM1

D

OAM1

D

OAM1

D

B6

OAM1

D

OAM1

D

R: registered

D: declared

OAM1

D

OAM1

D


Garp frame format

GARP frame format

Attribute Value is the OAM domain Level

No modifications to the GARP frame format


Summary

Summary

  • GORP is a new GARP application similar to GVRP (same frame format, new attribute)

  • GORP allows OAM domain pruning to prevent leaks

  • GORP automatically configures/reconfigures OAM domain


Oam domain configuration using garp generic oam registration protocol gorp

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