Acceptance Testing

1. Acceptance Testing The Quilt Optical Workshop June 22, 2004 pschopis@oar.net

2. Outline • Background • Layered approach • Specific targets • Physical Layer • Optical Layer • Full System

3. Testing Background • Adapted lab approach • Examples on Web at ITEC sites • http://www.nc-itec.org/archive/CAR/plan.html • http://www.adec.edu/nsf/index.html

4. Disclaimer • OARnet purchased existing fiber from vendors • OARnet used SBC as integrator

5. Test Case Outline • Start with baseline • State explicit requirements for test • State clear testing procedure • State expected outcome • State success criteria • Make subsequent tests dependant on the success of previous test

6. NOTE: • If using an integrator at least make acceptance criteria part of the Scope of Work (SOW) • Understand how much testing they will do for price paid • Understand what the integrator will charge for additional testing • Have existing test criteria from IRU and hold vendors feet to the fire.

7. Layered Approach • Full System (Layer 2 &3 functional network) is dependant on optical layer • Optical layer is dependant on Physical Layer • Physical layer is dependant on fiber type, quality of splicing and mechanical connections • By now you know where I’m going with this • A full blown test plan is a lot of work but helps with documenting network baselines for future • If using a SOW it can be substituted for test plan as long as all documentation and segmentation of data is maintained

8. Targets Physical Layer • Fiber characterization should include • Testing with all fiber components installed e.g. FDP, pigtails etc • Should meet manufacturers dbm per linear measure (Kilometers or Miles) • All splices should meet stated criteria (Note: average over span seems to be more important) • Dispersion should meet fiber manufacturers specifications • Note: Reflection is the boogeyman all others seem easily addressed (-29 db is acceptable, at least in our system)

9. Target Physical Layer • All OTDR are performed at 1550 and 1625 nm ( C and L bands) • Telcordia specs for ORL < -27 ideal < -40 • All PMD set for 10 Gigabits = 10ps/km, ( 2.5Gbps = 40ps/km, 40 Gbps = 2.5 • Chromatic dispersion 16 to 12K ps/nm for 2.5, 800 to 1000ps/nm for 10 Gbps, 40 Gbps 60 to 100 ps/nm

10. Targets Physical Layer • Poor splicing that results in reflection must be addressed • Overall dirt in providers bulk heads has been easy but time consuming to correct

11. Targets Optical Layer • All gear is staged and burned in • All gear is configured in staging and tested to make sure send/receive specifications are met • All gear is configured in staging using fiber characterization data • Post installation all gear is tested, a BERT is run for 24 hours at max load.

12. Targets Optical Layer • Throughput e.g. Frame Loss • Back-to-back ( duration, binary search) • Verify receiver high/low sensitivity • Verify receiver LOS sensitivity • Verify DWDM Send/Receiver Sensitivity • Verify optical laser output • Verify framing/encapsulation

13. Targets Optical LayerFinal Acceptance • All nodes are powered down and brought back up to insure proper service recovery • All fiber jumpers are installed correctly • All power is run correctly and verified to meet specs • Cabinet access tool is hanging on back of cabinet

18. Full System • All routers and switches are attached to optical devices • Routers and switches are configured and brought on line • All point-to-point links tested under load with souce/sink bidirectioanlly for 24 hours.

19. Questions?