CESNET a.l.e. Czech Educational and Scientific Network Long distance fiber connections in NREN, TF-NGN 1October 18, 2002 Long distance fiber

CESNET a.l.e. Czech Educational and Scientific Network www.cesnet.cz

Long distance fiber connections in NREN, TF-NGN 1October 18, 2002

Long distance fiber connections in NREN

Lada Altmanová, Jan Radil,

Stanislav Šíma



Customer Owned Fiber networks• Networks using optical fibres constructed, bought

or leased by some network users/customers• Wide independence of Customer Owned Fiber

(COF) networks on carriers• Unique window in time for fiber assets or IRU• Getting fiber means controlling the network• Path to deployment of different wavelengths for

different networks, lambda services, QoS on backbone, optical switching etc., when it makes sense

• COF networks are emerging chronologically from bottom of hierarchy to top



Connections for WAN RENs• Interconnection of REN segments by carier’s

lambda services (e.g.: Starlight, CESNET, Pioneer, etc.)

• Interconnection of regional area REN’s lambda services (Ca*net4)

• Long distance owned or leased fibre, e.g.:– fibre owned or leased by a group of universities, etc.

(UCAID, CENIC, SWITCH, CESNET, etc.)

– fibre owned or leased by a group of RENs, etc. (CANARIE?, GEANT/DANTE?, Nordunet?, etc.)



RENs using own or leased fibers• Advantages given by Customer Owned

Fiber (COF) networks are important for RENs

• Developing COF networks:– ORAN, I-wire, CalREN, SWITCH, CESNET,

SANET, Pioneer, ….

• Prepared COF network:– National LightRail, USA (2003) ….– European fiber connections?



Equipment and servicesfor COF RENs

• Significant investments in LH/ULH optronics and ongoing maintenance are required

• Fiber leasing or maitenance of own fibers instead of carier services?

• Optronics vendors now are becoming aware (at least in USA) of the non-carrier (enterprise, RENs) market for their WAN gear



PoP to PoP fiber lengthsin COF REN

• Metropolitan lines < cca 80 km (e.g. COF RENs in Praha or Brno, etc.)

• Long hall (LH) lines: cca 80-400 km (e.g. PEI, SWITCH, CESNET, etc.)

• Ultra long hall (ULH) lines > cca 400 km (e.g.: US National LightRail?)

• Air distances are 50 – 90% of this due to terrain profiles and fibre curves



Type of lines depending on in-line equipment

(equipment placed away of PoPs)• Type 0: None (NIL)• Type 1: Dispersion compensators (DCIL)• Type 2: Optical amplifiers (OAIL)• Type 3: Regenerators (RIL)(Possibilities depends on distance, fibre type,

basic speed, color count, etc.)



Ostrava – Olomouc (Long distance GE line since January 7, 2002)• 149 km leased fiber, in-line L2 switch used as

regenerator• Traffic statistics:

http://www.cesnet.cz/provoz/zatizeni/• Line cards: GE for GSR with GBIC-ZX• Catalyst 3512 XL with GBIC-ZX• GBIC-ZX: Pin: 0 to 4,77dBm, Pout: -23 to 0dBm,

power budget: 23dB



Praha-Pardubice(Long distance GE line since May 17, 2002)

• 189 km leased fibre G.652, attenuation 44.65dB, without in-line equipment

• Traffic statistics: http://www.cesnet.cz/provoz/zatizeni/

• Line cards: GE for GSR with GBIC-ZX• Optical amplifier: Keopsys KPS-BT-C-21-Bo-FA

21dBm booster, C-band single channel• Optical attenuator: 5dB (for optical amplifier

input)



Keopsys Optical Amplifiers connection



Recomended line end aplication for 1 Gb/s and 2.5 Gb/s lines (NIL)

• Booster only - up to 180km

• Booster with preamp - up to 220km

• Booster with preamp and Raman - up to 270km



Prepared long distance single fiber Fast Ethernet lines (NIL)

• Two colors in one fiber, one color for one direction (bi-directional transfer)

• Fiber length up to 125 km (G.652)• Price of single fibre leasing: 51-64% of pair price

(depends on provider)• Price is comparable with carrier’s 34 Mb/s SDH service

(but this use microwave transfer, at least in part)



Single fibre bi-directional Fast Ethernet transferFibre length (km)

Leased fibre(EURO/m/ month)

EURO/month

Pair ofconvertors (EURO)

Leased pair offibres (EURO/m/month)

Leased pair offibers (EURO/month)

Convertors payoff (month)

10 0,03 267 5 552 0,04 417 37,020 0,02 467 5 552 0,04 833 15,130 0,02 700 5 552 0,04 1 250 10,140 0,02 933 7 773 0,04 1 667 10,650 0,02 1 167 7 773 0,04 2 083 8,560 0,02 1 400 14 133 0,04 2 500 12,870 0,02 1 633 14 133 0,04 2 917 11,080 0,02 1 867 14 133 0,04 3 333 9,690 0,02 2 100 14 133 0,04 3 750 8,6100 0,02 2 333 14 133 0,04 4 167 7,7110 0,02 2 310 15 301 0,04 4 583 6,7125 0,02 2 625 15 301 0,04 5 208 5,9

4,4 0,20 880 5 257 0,33 1 467 9,0

100BaseTx, SM,1550nm,1-30km,RJ45-SC/PC100BaseTx, SM,1550nm,20-50km,RJ45-SC/PC100BaseTx, SM,1560nm,40-100km,RJ45-SC/PC100BaseTx,SM,1520&1560nm,125km,RJ-SC

Example for different price level:

Type of convertors (Nbase-Xyplex):

EM316WFC/S5&EM316WFT/S5

EM 316WFC/S2 & EM316WFT/S2EM 316WFC/S3 &EM 316WFT/S3EM 316WFC/S4 &EM 316WFT/S4



StarLight-NetherLight and further

• Extension of international experimental lambda switching network to Praha expected from January 2003 (lambda 2.5 Gb/s Amsterdam - Praha), upgrade to 10 Gb/s from July 2003 (lamda or leased fiber)

• Further extensions?



CAnet4

CERN15454

2.5Gb (OC-192)

2.5Gb2.5Gb

OC-48GE

Chi/Ams15454

Chi/CA15454

10Gb Oct 2002

MEMS

10Gb Jan 2003

Prague15454

London

NY Abilene?

Border Router

Ams15454

Border Router

1670

Alcatel1670

StarLight

10GE

T640

Groningen

Stockholm

(US clusters)6509



Long distance 10 GE fibre lines• Expected distance up to 300km on dispersion

shifted fiber (G.655), i.e. NIL (Nothing In-Line)• Expected distance up to 300km with in-line

chromatic dispersion compensation only on classic fiber (G.652), i.e. DCIL or NNIL (Near Nothing In-Line) type

• for G.652 compensation of chromatic dispersion by DCF (Dispersion Compensating Fiber) each 50-60 km

• Booster, preamp and Raman optical amplifiers on end points



Prepared testing of 10 GE fibre lines

• Field fiber testbed with dispersion shifted fiber (G.655) and classic fiber (G.652) – from December 2002

• Combination of intercity G.655 and first mile G.652 fibers??

• Connection of interface cards an optical amplifiers: results depends on parameters of used optical devices (lasers in Cisco interface cards or other hardware)



Availability of Cisco 10GE cards- long reach (40 km) version

• Catalyst 6500 1550nm: yes

• OSR 7600 1550nm: yes

• GSR 12400 1550nm: to be 2002

• ONS 15454: is prepared

• other producer: we are interested to negotiate testing



Long distance fiber line registration service?

• We offer registration service for NIL and DCIL lines (for better experience exchange)– over 80 km for 1 Gb/s and 2.5 Gb/s on fiber

pair– over 40 km for 10 Gb/s and more on fiber pair– over 20 km for 100 Mb/s and more on single

fiber



Acknowledgements

• Jan Gruntorad and colleagues from CESNET

• Serenate initial workshop speakers

Documents

CESNET a.l.e. Czech Educational and Scientific Network Long distance fiber connections in NREN, TF-NGN 1October 18, 2002 Long distance fiber