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Update on CEF Networks in Slovakia. P avol H orv á th, Maria n Ďurkovič, Tibor Weis. SANET2 Network. Fully based on dark fibre Ethernet everywhere (LAN, MAN, WAN) significant reduction of network complexity much lower cost than routers with POS interfaces easy and unified management

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update on cef networks in slovakia

Update on CEF Networks in Slovakia

Pavol Horváth, Marian Ďurkovič, Tibor Weis

CEF Workshop Praha 2006

sanet2 network
SANET2 Network
  • Fully based on dark fibre
  • Ethernet everywhere (LAN, MAN, WAN)
    • significant reduction of network complexity
    • much lower cost than routers with POS interfaces
    • easy and unified management
  • First part in production since Feb. 2002

CEF Workshop Praha 2006

progress since cef2005
Progress since CEF2005
  • Gigabit ethernet trunks running out of capacity
    • especially on cross-border links
  • But “big” DWDM solution unnecessary and too expensive for SANET’s needs
  • One 10-gigabit ethernet fully sufficient

links are 802.1Q trunks - native support for L2 services

  • Keep the possibility to install second lambda

CEF Workshop Praha 2006

international connectivity
International Connectivity
  • Cross-border fibre to AT, CZ
    • IRU-like contracts for 10 years
    • maintenance provided by DF owner
  • CBF to PL, HU and UA planned
  • Peerings: 10 GE connection to SIX, VIX and NIX
  • Commodity IP transit (Sprint, GTS)
  • Connection to GEANT

CEF Workshop Praha 2006

cbf bratislava wien
CBF Bratislava - Wien
  • Gigabit ethernet in production since Aug. 2002
  • 108 km of G.652 fibre - chromatic dispersion too high for today’s ZR XENPAKs
  • Changed the intercity part for G.655 fibre:

6 km of G.652 + 90 km of G.655 + 12 km of G.652

  • Connection from G.652 to G.655 had to be spliced
  • 10-gigabit ethernet in production since 26.1.2006
    • NIL solution, no amplifier nor DCM needed

CEF Workshop Praha 2006

cbf bratislava brno
CBF Bratislava - Brno
  • 200 km of G.652 fibre
  • Gigabit ethernet in production since Apr. 2003
  • L2 switch used as signal repeater
    • not optimal if several lambdas need to be installed
  • CESNET developed and deployed NIL solution with CzechLight amplifiers providing 4 lambdas
  • 10-gigabit ethernet in production since 14.2.2006

CEF Workshop Praha 2006

external traffic
External Traffic

CEF Workshop Praha 2006

national backbone
National Backbone
  • 1770 km of dark fibre
  • 2 providers: Orange, Slovak Railways
  • IRU-like contracts

for 10 years

  • Maintenance provided by DF owner

CEF Workshop Praha 2006

metropolitan networks
Metropolitan Networks
  • Originally in 8 regional centres
  • Now also in other towns
  • Ducts + cables owned by SANET
    • upto 144 fibre strands per cable
    • maintenance outsourced to specialized company
  • Coordinated activities with other investors
    • significantly lower trenching costs
  • Cooperation with local governments

CEF Workshop Praha 2006

metropolitan networks 2
Metropolitan Networks (2)
  • Some municipalities are members of SANET
  • Their dark fibre infrastructure is available to other members free of charge
    • schools, hospitals, museums, libraries
  • SANET provides technical support and know-how

CEF Workshop Praha 2006

backbone equipment
Backbone Equipment
  • 16 x Catalyst 6509
    • 4 x 10 GE, 48 x GE, 48 x FE ports
  • 10 x Catalyst 3750/3550
    • 2 x GE, 24 x FE ports
  • Long reach optical transceivers
    • approx. 70 pieces in total

CEF Workshop Praha 2006

optical monitoring
Optical Monitoring
  • Recent transceivers have the ability to report

real-time operating parameters:

    • laser temperature/current, RX/TX optical power
  • Ultimate requirement for CEF networks
  • Good support on DWDM/SDH equipment
  • But support on ethernet switches or routers is sometimes buggy or non-existent
  • Need to push vendors to implement it
  • Compulsory on all new equipment purchases

CEF Workshop Praha 2006

optical monitoring 2
Optical Monitoring (2)

CVT-Bratislava# show interfaces transceiver

Optical Optical

Temperature Voltage Current Tx Power Rx Power

Port (Celsius) (Volts) (mA) (dBm) (dBm)

------- ----------- ------- -------- -------- --------

Te1/1 34.6 0.00 33.6 -1.5 -4.6

Te1/2 32.0 0.00 8.8 -2.5 -2.9

Te1/4 34.0 0.00 101.6 1.2 -21.9

Te2/1 33.1 0.00 30.5 -1.1 -5.0

Te2/2 36.7 0.00 101.2 1.1 -14.6

Te2/4 34.4 0.00 102.7 0.7 -13.6

Gi3/3 45.9 3.30 34.6 2.9 -20.2

Gi4/12 40.7 3.30 36.1 2.8 -20.8

Gi5/1 35.6 3.32 5.1 -4.5 -5.8

Gi5/2 35.1 3.32 14.4 -5.0 -15.1

CEF Workshop Praha 2006

research future plans
Research & Future Plans
  • Advanced layer-2 for ethernet networks
    • spanning-tree protocol blocks all redundant links
    • leads to inefficient use of resources and suboptimal packet flows
    • two activities to address these problems:
      • IEEE’s 802.1aq shortest path bridging
      • IETF’s TRILL (based on routing bridge proposal)

CEF Workshop Praha 2006

research future plans 2
Research & Future Plans (2)
  • 100-gigabit ethernet development
    • native next step for SANET without the need for additional technology
    • no change in overall network concept
    • with advanced modulation and 4 lambdas @ 12.5G reach over dark fibre might be similar to 10 GE
    • if ready in 2010, it will match SANET’s upgrade cycle

CEF Workshop Praha 2006

slide17

Time for your questions

CEF Workshop Praha 2006