Provisioning Janet
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The document discusses the state of the JANET network as of October 2016, highlighting its operation since 2013 and the ongoing mid-term upgrade to enhance capacity through increased core links and new backbone routers. It addresses network performance, traffic management, and the challenges of scaling in response to growing data demands. The document concludes with questions on future provisioning strategies and the potential for smarter network services.
Provisioning Janet
- 1. Provisioning Janet Rob Evans, Chief network architect 19/10/2016
- 2. Where are we today? »Janet6 in operation since 2013 › Transmission and IP layer both managed by Janet NOC › “No hidden extras” for additional capacity »Currently undergoing a ‘mid-term upgrade’ › Core links being increased › Backbone routers being replaced –Greater 100GE density –ExistingT4000 platform has no development › Increase in capacity to regions19/10/2016 2Campus network engineering for data intensive science
- 3. The Janet6 backbone 19/10/2016 Telehouse North Telehouse West Lowdham Leeds Equinix HEX Equinix PG Equinix Manchester Erdington Glasgow Bradley Stoke 4x100GE 2x100GE 1x100GE Shared DC, Slough Shared DC, Leeds 3Campus network engineering for data intensive science
- 4. Weekly incoming traffic peaks 19/10/2016 4Campus network engineering for data intensive science
- 5. To use a more natural scale 19/10/2016 5Campus network engineering for data intensive science
- 6. Plumbing the tubes »34Mbit/s: 2.64 inches »155Mbit/s: 5.64 inches »622Mbit/s: 11.4 inches »2.5Gbit/s: 1.9ft »10Gbit/s: 3.8ft »40Gbit/s: 7.6ft »100Gbit/s: 12ft »200Gbit/s: 17ft »400Gbit/s: 24ft 19/10/2016 400Gbit/s 200Gbit/s 100Gbit/s 40Gbit/s 10Gbit/s 6Campus network engineering for data intensive science
- 7. If Janet were a sewer… LeeTunnel, 24 feet in diameter. Photo © Thames Water 19/10/2016 7Campus network engineering for data intensive science
- 8. What is it all? »Much of this is ‘commodity’ IP »Top graph: traffic between Janet and GEANT › Most external R&E traffic (except dedicated ccts) »One instance of an overlay we’ll learn about later is LHCONE »Bottom graph: traffic between Janet and LHCONE 19/10/2016 8Campus network engineering for data intensive science
- 9. That’s just the backbone »Janet6 ensured we installed transmission nodes into the RNEPs › Or what used to be called RNEPs »Regions still have a mix of fibre and leased lines › Have tried to move towards fibre where we know there’s a need »Aiming to rationalise the architecture between backbone and regions 19/10/2016 9Campus network engineering for data intensive science
- 10. Site access »Aim for access circuits to be contention-free › Sometimes usage surprises us –Upgrades have lead times, even if we have fibre to the door › Account managers are the interface between Jisc and members »QoS is not a bag of worms that we want to open 19/10/2016 Campus network engineering for data intensive science 10
- 11. Performance problems »As far as the NOC is concerned ‘just another form of network fault’ › Report in the usual way via the Janet Service Desk »Realising that some form of faults require more specialist knowledge › Hence the end-to-end performance initiative 19/10/2016 11Campus network engineering for data intensive science
- 12. Options »Can we continue to scale? › Related: can we afford to continue to scale? › Is big data anything more than feeding the current exponential growth? »Should we offload more traffic? › Separate DTZ interfaces rather than sharing IP capacity? »Should we encourage more ‘off-peak’ data transfers? »Notice the question marks – topics to discuss! 19/10/2016 12Campus network engineering for data intensive science
- 13. Flattening the demand curve? 19/10/2016 Provision based on this This is never used 13Campus network engineering for data intensive science
- 14. Where next? »More flexible provisioning of end-to-end 10G paths › Primary user of transmission layer was expected to be the Janet IP layer › Did not forsee scale of requirement and expected them to be offloaded to Lightpaths / Netpaths › Optical layer is designed for 40/100G+ –10G doesn’t use spectrum efficiently 19/10/2016 14Campus network engineering for data intensive science
- 15. Where next? »Could be done on the transmission layer › OTN »Could be done on an ethernet layer › SDN, EoMPLS »Does capacity need to be guaranteed or just segregated? »Smarter services rather than just bandwidth? › On-net storage 19/10/2016 Campus network engineering for data intensive science 15
- 16. jisc.ac.uk Questions and discussion Rob Evans Chief network architect @internetplumber Rob.Evans@jisc.ac.uk 19/10/2016 16Campus network engineering for data intensive science
Editor's Notes
- #2: Background picture is of Janet6 staging, nodes destined for Manchester
- #4: Mention next steps in the mid-term upgrades here. 6x100 on the southern part of the core, 4x100 on the northern, 2x100 to Glasgow and Bristol
- #6: To meet this, the backbone bandwidth continues to grow. In the grand tradition of contrived metaphors…
- #9: Definition of commodity IP is open to discussion How do we know if traffic from Google is a cat video or a genome visualisation? One site in particular, who will probably make themselves known later on.
- #13: Affordability: most components are priced in US$ Leading onto the next slide.