From Electromagnetic Field 2022
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Description Internet Exchange Point
Contact User:Benjojo
Web Site
View all Villages


Name Arrival Departure Bringing Arrived?
Ben Cartwright-Cox Fri Jul 1 15:54 Sun Jun 5 18:54 An Internet Exchange
eta Thu Jun 2 12:00 Mon Jun 6 9:00
June Slater Radios, Computers, and a variety of schnanigans
3 inhabitants. Refresh this list.

You can add yourself to a village by editing your profile page, here (after creating an account, if you do not yet have one).

Aligned with the Hacks R Us village, EMF-IX Provides to bring a Internet exchange point to the field near Eastnor. Improving the local internet access and performance.

The internet exchange is mostly run by User:Benjojo however there are a handful of other people also running the exchange.

We are over here on the map:

IXP Equipment

Type Model Owner
Switch ECS4610-50T Benjojo
PDU 2x APC 8 Port C14 Benjojo
Server SuperMicro x9 1U system Benjojo
Server 8x WYSE 3020 Benjojo

Exchange Policy

The traffic graph of LINX Wales

The goal is to beat out the nearest rival exchange, LINX Wales. However should be achievable as the traffic profile for LINX is around 15mbps baseline to 130 mbps peaks.

In 2018 EMF-IX beat LINX Cardiff (as it was known at the time) by 5mbps. So precedent is set.

(2018) EMF-IX vs LINX traffic

General peering / exchange policy is as follows;

The Technical Specifications state the following:

There are only three ethertypes allowed:

  • 0x0800 - IPv4
  • 0x0806 - ARP
  • 0x86dd - IPv6

Other ethertypes may be allowed if EMF-IX operators are warned of ahead of time.

By default, Only one MAC address allowed on a port, i.e. all frames sent towards the IX should have exactly one unique MAC address.

The only non-unicast traffic allowed is:

  • Broadcast ARP
  • Multicast ICMPv6 Neighbour Discovery (ND) packets. (NOTE: this does not include Router Advertisement (ND-RA) packets!)
  • You must not broadcast multicast packets into the multicast media LAN


Full members list can be found on the EMF-IX website and provisioning portal:

ASN Name Hardware Connected
AS213185 eta Heese MikroTik hEX Lite FALSE
AS210561 Q Misell Unknown FALSE
AS211244 Harley Tomas Watson WYSE 3020 FALSE
AS203729 June Slater Apple(tm) iRouter(tm) FALSE
AS50419 Eye Pea Ltd. Unknown FALSE
AS211998 Violet Monkey Consulting LTD Unknown FALSE
AS207755 Rory Bolton Unknown FALSE
AS207748 Stephen Fraser Unknown FALSE
AS202562 Roelf Wichertjes WYSE 3020 FALSE
AS211579 Laura Hausmann Unknown FALSE
AS204345 Timothy Stallard Unknown FALSE
AS206754 Alistair Mackenzie Unknown FALSE
AS112 AS112 Project Plumspace Smart SFP FALSE
AS57782 Cynthia Maja Revstrom WYSE 3020 FALSE
AS206924 Ben Cartwright-Cox Juniper SRX 110 FALSE
AS207846 Lauren Renee Kelly WYSE 3020 FALSE
AS207080 Basil Fillan WYSE 3020 FALSE
AS208563 Ilteris Yagiztegin Eroglu WYSE 3020 FALSE
AS200639 Cross Computing Services Limited Thinkpad FALSE
AS207754 James Colderwood Unknown FALSE
AS205479 Luke Eiji Granger-Brown Unknown FALSE
AS39192 John Hadrill WYSE 3020 FALSE

Hosted Machines

The BIOS Setup of a WYSE 3030

Since not everyone can bring systems to EMF, 8 pre-provisioned Dell WYSE 3030 systems are designed to be limited, but also as "Plug and Play" as possible.

The WYSE machines have a Intel Atom CPU of around 450 Passmark and 2GB of RAM. Storage is provided over the IX via ATA_over_Ethernet (AOE).

AOE is used to prevent people from iptables'es-ing away their storage, as this would be quite disadvantageous for any poor soul who does that. Instead the AOE Storage is provided by the IX server (on SSDs) in the flight case. Connected to the internet exchange at 10GbE.

These WYSE systems are entirely PXE booted over the network and while there is eMMC storage on them, We ask members to not touch that.

The original plan was for these machines to be 2007 Mac Mini's, However they proved impossible to purely netboot, and had already had their disks removed. So a switch to the WYSE machines provided a welcome sanity boost, and performance jump!