Outline
● Opportunity● Geography/Building Blocks● Proof of Concept● Design● Resource Requirements● Outcome● References/URLs
Opportunity
● The main campus of the University of New England (UNE) is located in Armidale, Northern NSW.
● UNE required a replacement for their expensive, ATM based tail link (8Mbps on E3) to the AARNet hub in Sydney.
● Transgrid offered UNE some surplus bandwidth on existing Transgrid infrastructure.
● AARNet wanted to explore low cost, long haul opportunities.
Concept
● Transgrid has long run fibre.● AARNet is a Carrier and has network building
and operating experience.● AARNet and Transgrid formed a partnership to
provide bandwidth to UNE.● Excess capacity could be sold to other customers.● UNE wanted a cost effective IP/ethernet service
from Sydney to Armidale.
Building Blocks
● TG had installed fibre in the Overhead Earth wire on some sections of their 330kV network.
● The fibre is brought to the ground and terminated only at substations and powerstations.
● The Armidale to Sydney section had some long fibre runs (>80km).
● AARNet was already using Cisco CWDM equipment with very good optical properties.
Building Blocks 2
● The CWDM GBICS support 1.25-Gbps full-duplex links with an Optical link budget of better than 30 dB.
● Cisco 3550-12T Gigabit ethernet Switches. Each supports 10 GBIC interfaces and two copper 10/100/1000 ports.
Available Fibre
A end B end KM Attn dBArmidale Tamworth 106 24.18Tamworth Muswellbrook 130 29.3Muswellbrook Liddell 19 4.96Liddell Newcastle 104 22.69Newcastle Eraring 22 5Eraring Vales Point 32 7.6Vales Point Munmorah 8 2.29Munmorah Sydney North 80 17.8Sydney North Sydney West 38 9.04
Proof of Concept
● The Tamworth to Muswellbrook leg was the longest at 130km with a 29.3dB optical loss.
● The PoC was tested on this leg using 1470nm and 1490nm CWDM GBICs in borrowed Cisco switches.
● When tested, the 130km link came up straight away and ran without error for the duration of the test. Power meter readings showed ample signal.
● The 1550nm GBIC were expected to perform better than the 1470 & 1490nm test optics.
Design● Each switch is a OEO
signal regenerator and a breakout node.
● Each switch can support 5 north/south GE paths.
● No provision for OOB management
● Customer separation by QinQ VLAN stacking
● Radio last leg until Broadway substation completed
Multiplex Design
● Initial design supports only 1 GigE path due to MUX losses
● Shorter runs can support CWDM mux
● Longer runs will need amplification to support CWDM mux
Resource Requirements
● >500kms of fibre● 6 x Cisco 3550-12T Gigabit ethernet switches● 12 x Cisco 1000BASE-CWDM GBIC 1550 nm● A few UPSs● Patch leads● Fibre tails from the TG sites to the end users● Clue
Outcomes● Lit up >500km fibre
run with Gigabit Ethernet.
● Six potential customer breakout/access nodes.
● Total cost for all active/optical gear less than cost of one SDH node.
● Potential for up to 8 GE paths.
References/URLs
● http://www.aarnet.edu.au/● http://www.une.edu.au/● http://www.transgrid.com.au/about_us/inset.html● http://www.cisco.com/warp/public/cc/so/neso/olso/nesocdwm/cgbic_ov.htm
● http://mangrove.nswrno.net.au/dist/public/tgune/unetgnet2_frame.htm
● http://xl.nswrno.net.au/tgune/● Alan Cowie – AARNet Sydney
Top Related