UKNOF31 (Manchester)

chaired by Keith Mitchell (UKNOF)
Monday, 20 April 2015 from to (Europe/London)
at Manchester Central Convention Complex ( Charter 1, 2 & 3 )
Petersfield Manchester M2 3GX

Participant Survey: (closes Tuesday, 5 May 2015)

Presentation Videos

Live Webcast: (now ended)

NOTE: Not all presentations may be broadcast and recorded.

IRC Chatroom:

Twitter hashtag: #UKNOF31

We are thankful to our sponsors for supporting UKNOF, enabling us to keep attendance at UKNOF meetings mainly free.



A10 Networks

Axians Networks

IX Reach



ADVA Optical
The Loop






Bogons        Portfast



Registration: Registrations are now closed.

Call for Presentations: Now closed.

Volunteers: We always appreciate volunteer help in setting up and running UKNOF events. If you're interested in helping at UKNOF31, please indicate this on the registration form. Our helpers always make a big difference.

Sponsors: Call for sponsors now closed.

If you are interested in supporting UKNOF, please contact us on


Go to day
  • Monday, 20 April 2015
    • 09:30 - 10:00 Registration ( Charter Foyer )
    • 10:00 - 10:10 UKNOF31 Welcome 10'
      Speaker: Mr. Keith Mitchell (UKNOF)
      Material: Slides pdf file
    • 10:10 - 10:25 How to convince your boss of the value of UKNOF. 15'
      a short talk to highlight the value of UKNOF to ensure not just attendance but active participation.
      Speaker: Mr. Neil McRae (BT)
      Material: Presentation Video link Slides pdf file
    • 10:25 - 10:55 DNS-based DDoS: Evolving Threat 30'
      Very recent changes in the intensity, duration and targets suggest continuing experimentation by attackers at the expense of DNS infrastructure worldwide. 
      Drawing upon high resolution worldwide resolver data this presentation will cover changes in attack vectors.  Tests of mitigation techniques will also be presented, comparing and contrasting alternatives.
      Speaker: Mr. Ralf Weber (Nominum)
      Material: Presentation Video link Slides powerpoint file pdf file
    • 10:55 - 11:20 Tales of the unexpected revisited - handling unusual DNS client behaviour (the sequel) 25'
      Experiences of unusual DNS query patterns have been the focus of many recent talks that have examined the sources, targets and intent of this traffic, as well as the impact seen by authoritative servers and resolvers alike.
      Last year, ISC proposed and then started trialling experimental recursive client rate limiting techniques in BIND, with the intent of limiting the impact of this unwanted traffic on both servers and DNS clients alike.
      This talk briefly recaps some of the problems that can be encountered and then presents a review of the effectiveness of the techniques that were introduced, along with results from live production environments.
      Speaker: Ms. Cathy Almond (Internet Systems Consortium)
      Material: Presentation Video link Slides powerpoint file pdf file
    • 11:20 - 11:40 Morning Coffee Break
    • 11:40 - 11:50 IX Manchester Lightning update 10'
      A brief overview on the developments being made in and around the IX Manchester peering exchange.
      A brief bullet pointed list of things I will discuss will include:
      - Exchange growth
      - New PoP sites
      - Current issues and projections
      - Quick Q&A
      (note no slide deck)
      Speaker: Mr. Matthew Hattersley (IX Manchester Steering Committee / Talk Straight Group Ltd)
      Material: Presentation Video link
    • 11:50 - 12:10 Grant money doesn't buy you happiness 20'
      Back in October 2013 a group of interested individuals met at the Millenium Center in Cardiff to discuss the possibility of starting a Welsh IXP. Plans developed and LINX along with Cardiff City Council and the DCMS discussed opening an exchange within BT Stadium House.
      Independently of LINX, the local city council offered grants of up to 20k to connect to the exchange, this was intended to cover the costs of routers and associated PoP build out fees.
      Currently only 2 of the 21 IXCardiff members ASNs existed prior to the grant being announced. This talk will highlight:
      - traffic levels
      - number of ASNs behind the same 2 local transit providers
      - prefixes shared on the same LIR
      - members with the same registered limited companies directors
      - how throwing money at a problem does not fix it
      15 minutes, this is with my ESGOB Ltd hat on.
      Speaker: Mr. Nat Morris (UKNOF/Esgob)
      Material: Slides pdf file
    • 12:10 - 12:25 On Factors Affecting the Usage and Adoption of a Nation-wide TV Streaming Service 15'
      Using nine months of access logs comprising 1.9 Billion sessions to BBC iPlayer, we survey the UK ISP ecosystem to understand the factors affecting adoption and usage of a high bandwidth TV streaming application across different providers. We find evidence that connection speeds are important and that external events can have a huge impact for live TV usage. Then, through a temporal analysis of the access logs, we demonstrate that data usage caps imposed by mobile ISPs significantly affect usage patterns, and look for solutions. We show that product bundle discounts with a related fixed-line ISP, a strategy already employed by some mobile providers, can better support user needs and capture a bigger share of accesses. We observe that users regularly split their sessions between mobile and fixed-line connections, suggesting a straightforward strategy for offloading by speculatively pre-fetching content from a fixed-line ISP before access on mobile devices.
      Speaker: Dr. Dmytro Karamshuk (King's College London)
      Material: Presentation Video link Slides powerpoint file pdf file
    • 12:25 - 12:40 Some Thoughts on Network Automation 15'
      Speaker: Mr. Andy Davidson (IIX)
      Material: Presentation Video link Slides powerpoint file pdf file
    • 12:40 - 14:00 Lunch Break
    • 13:00 - 13:30 PGP Signing Session 30' ( The Gallery (outside Charter Suite) )
      Speaker: Mr. Matthew Walster (LMAX Exchange)
    • 13:30 - 14:00 Group Photo Shoot 30' ( Outdoor Entrance Stairway )
      Join the big UKNOF Group shot !
      Meet on the stairs outside the venue
      Speaker: Mr. Keith Mitchell (UKNOF)
    • 14:00 - 14:30 BT and TalkTalk L2TP Experiences 30'
       Host links
       Backhaul (congestion?)
       Tails (DLM, margins, etc)
       XML, APIs and portals
       Host links
       (this has to be a big vague sadly, but we can cover the main points)
       SFI and engineer visits
       SFI! and disputes
       Not a forum to compete with UKNOF or LINX
       Fixing BT and TT over SFI and engineers
       Working with BT and TT to improve services
      Speaker: Mr. Adrian Kennard (AAISP)
      Material: Presentation Video link Slides pdf file
    • 14:30 - 14:55 G.Fast and NGA2 25'
      More information on what BT is doing with G.Fast and its ultrafast broadband roll out delivering hundreds of megabits a second over copper.
      Speaker: Mr. Neil McRae (BT)
      Material: Presentation Video link Slides pdf file
    • 14:55 - 15:15 AS112 Operations and Surveys 20'
      AS112 is a co-operatively operated DNS anycast cloud which acts as a sink for junk queries to non-public IP address space.
      This presentation is an overview of current AS112 happenings as well as the latest survey of detected AS112 nodes with a focus on research networks and AS112, together which some new findings from analysis of AS112 data.
      Speaker: Mr. Keith Mitchell (UKNOF)
      Material: Presentation Video link Slides pdf file
    • 15:15 - 15:30 Distributed Prevention of DDoS 15'
      Sponsor Presentation
      Speaker: Andrew Bays (A10 Networks)
      Material: Presentation Video link Slides powerpoint file pdf file
    • 15:30 - 16:00 Afternoon Coffee Break ( The Gallery (outside Charter Suite) )
    • 16:00 - 16:30 Counting the world with skewed samples: how APNIC adusts its measurements 30'
      APNIC has been conducting a long lived (5 year) measurement activity using google ads and javascript placements worldwide. We collect over 700,000 experiments a day from end users.  The sampling is random, but has placement bias. So, we've developed methods of adjusting for this using world population stats. A side effect of this is that we may now have one of the only public insights into relative market share in the ISP community worldwide, and inside each economy.
      Speaker: Mr. George Michaelson (APNIC)
      Material: Presentation Video link Slides pdf file
    • 16:30 - 17:00 FFO - fracking fiber optic 30'
      LC plugs are not the only ones now that we have QSFP+. Should you use MPO or MTP. What about ST, LC, SC, E2000 or the new LC Uniboot plugs ? What are the compromises and benefits of each solution. 
      Did you know that polarity in optical MPO matters ? And why the polish of a plug can cause headaches during on-site installation.
      Thomas will give an overview of the connectors and fibre options in the datacentre now we have 40G and 100G as standards. Especially for parallel transmission applications you should consider rethinking your wiring if you don’t want to get stuck in troubleshooting your links. 
      Finally some practical examples of broken optical components after and during field installation – real cases which happen every day even in 2015 when fibre optic is a commodity.
      Duration: 25-30 minutes
      Speaker: Thomas Weible (Flexoptix GmbH)
      Material: Presentation Video link Slides pdf file
    • 17:00 - 17:30 Catastrophic Unplanned Success 30'
      Very quickly building and upgrading platforms to support some high profile sites using entirely open source technologies, a shoestring budget and why at busy times internal traffic within Mythic Beasts is more likely to be IPv6 than IPv4.
      Speaker: Mr. Peter Stevens (Mythic Beasts)
      Material: Presentation Video link Slides pdf file