OC-192 VSR Interfaces Russ Tuck, Ph.D. [email protected].

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OC-192 VSR Interfaces Russ Tuck, Ph.D. [email protected]

Transcript of OC-192 VSR Interfaces Russ Tuck, Ph.D. [email protected].

Page 1: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

OC-192 VSR InterfacesRuss Tuck, Ph.D.

[email protected]

Page 2: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

What is the OIF?

Optical Internetworking Forum Launched in April of 1998 Open forum: 250 members including many of the

world’s leading carriers and vendors The only industry group bringing together

professionals from the packet and circuit worlds Mission: To foster the development and deployment

of interoperable products and services for data switching and routing using optical networking technologies

Page 3: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

What is the OIF PLL WG?

Physical and Link Layer Working Group Three areas of work

• Very Short Reach (VSR) interfaces for OC-192• Internal interfaces for OC-192 and OC-48

• Framer interface for POS – system side• Transponder interface – framer side

• OC-768• VSR and internal interfaces

Other OIF WGs: Arch, Signaling, OAM&P• Major Project: UNI 1.0

Page 4: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

What is VSR? What’s an IA?

Very Short Reach SONET/SDH interface• Within a single facility or CO, < 1km• Intra-office links between routers, DWDMs, OXCs• $1000s less than SR interfaces

Implementation Agreement• Compliant implementations interoperate• OIF “standard”

Page 5: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Potential VSR links (in red)

CustomersPeering partnersInternet exchange

AccessRouter

HostRouter/switch

WAN Router

Core Router

WebServer

WebServer

OXC

DWDM

WebServer

DWDM

Page 6: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Requirements (will discuss more later) Substantially lower cost than SR 300m reach

• 100m? 600m? 50m? 1 patch panel in path

• More patch panels?• Transparent OXC?

Multi-source components Non-requirement?

• Use installed fiber infrastructure

Page 7: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Current VSR Alternatives

12-fiber MMF ribbon, 850nm, 1.25 Gbs/fiber 4-fiber MMF ribbon, 850nm, 2.5 Gbs/fiber 1-fiber SMF, 1310nm, 10 Gbs/fiber 1-fiber MMF, 850nm, 10 Gbs/fiber 1-fiber MMF, 4 lambda ~850nm, 2.5 Gbs/lambda

Page 8: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

12 MMF ribbon, 850nm @ 1.25 Gbs

2 12-fiber ribbons (Tx, Rx) VCSEL based GigE speeds 300m with 4 connectors (1 patch panel)

62.5μm core MMF, same as guaranteed for 500m GigE• 400MHz.km modal bandwidth

MTP™ (MPO) connectors

VSRIF

VSRIF

PatchPanel

Page 9: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

4 MMF ribbon, 850nm @ 2.5 Gbs

1 12-fiber ribbon (4 fiber Tx, 4 fiber Rx, middle 4 unused) VCSEL based OC-48 (2x GigE) speeds 300m with 2 connectors (no patch panel)

50μm core MMF, 500MHz.km modal bandwidth MTP™ (MPO) connectors

VSRIF

VSRIF

Page 10: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

1 SMF, 1310nm @ 10 Gbs/fiber

2 single fibers (Tx, Rx) Edge-emitting FP lasers

• Eventually also VCSELs 10Gbs 600m – dispersion limited, 5dB loss budget SMF Based on ITU-T G.691

Page 11: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

1 MMF, 850nm @ 10 Gbs

2 single fibers (Tx, Rx) VCSEL based 10Gbs Reach, with 4 connectors (1 patch panel)

• 25m• 62.5μm core MMF, 160MHz.km modal bandwidth

• 85m• 50μm core MMF, 500MHz.km modal bandwidth

• 270m• 50μm core MMF, 2000MHz.km modal bandwidth• >300m if eye safety regulations change as expected this year

VSRIF

VSRIF

PatchPanel

Page 12: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

1 MMF, 4 λ (~850nm) @ 2.5 Gbs

2 single fibers (Tx, Rx) VCSEL based, but different wavelengths

• Optics combine and split wavelengths 2x GigE speeds 300m with 4 connectors (1 patch panel)

• Uses open fiber control

50μm core MMF, 500MHz.km modal bandwidth Duplex SC connector

VSRIF

VSRIF

PatchPanel

Page 13: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Questions?

I’ll answer some, then I’ll ask you some.

Page 14: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

BoF Demographics

Backbone Carriers (choose one) National ISPs Local ISPs Co-lo/Hosting/IXP Equipment Vendors Other

Using DWDM (choose all that apply) Using OXC Using POS Using ATM Using OC-192 Using OC-48

Page 15: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Applications

Which links will be first to use VSR?• When?

Which links will not use VSR?• Why?

OXC

DWDMDWDM

Page 16: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Reach

Which is more important?• Long enough for all intra-office links

• (How long is that?)

• Short and cheap• (How short?)

Page 17: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Reach

If it saves $1000/port, how long a reach does it need?

• 50m• 100m• 300m• 600m

If it saves $5000/port, how long a reach does it need?

• 50m• 100m• 300m• 600m

Page 18: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Fiber Type

Required Good OK Bad No

Way

Don’t

Care

Use existing installed fiber.

SMF?

MMF?

Serial?

Ribbon (parallel)?

High-BW MMF?

Page 19: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Fiber Lifetime

Are VSR cables “patch cords” or “infrastructure”?• Why?

If “infrastructure”, how long must they be useful?• How expensive to install?

Page 20: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Interface Longevity

How often should there be new, lower-cost links?

How much cheaper should a new interface be?

Page 21: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Loss Budget – Transparent OXC

Will you use an OXC between routers and DWDMs (in next 2 years)?

• Transparent?• OEO?• All links?

If transparent:• Wavelength?• dB loss?• SMF only?

• Must all VSR links

support OXC? Or 2 types?

OXC

DWDMDWDM

Page 22: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Loss Budget – Patch Panel

How many patch panels per link? How many connectors?

VSRIF

VSRIF

PatchPanel

Patch panels: 1Connectors: 1 2 3 4Reach:

Page 23: OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com.

Vendor Support

How many vendors must support interoperable VSR implementations before you deploy?

• 1• 2• 3• 5• 10• 30

Why?