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pberndro
➔ Philip Berndroth - philip@freifunk-rheinland.net
➔ Member of the board Freifunk Rheinland e.V.
➔ Run my own company with software and datacenter stuff
➔ Hungarian Gulash fan
➔ Twitter: @pberndro - Facebook: facebook.com/philip.berndroth
Max
➔ Maximilian Wilhelm - max@rfc7511.org
➔ Senior Infrastructure Architect @ University of Paderborn
➔ SIA + Member of the board @ Freifunk Hochstift e.V.
➔ Open Source Hacker
➔ Fan of fine Whisky and Tiramisu
➔ Twitter: @BarbarossaTM - Facebook: facebook.com/Maxemann
What is Freifunk and what does the FFRL?
●
●
●
●
●
Bring the Internet to _all_ people
Free wifi for refugees
●
●
●
●
●
Build internet into the wild is hard...
●
●
●
●
●
VPN providers don’t scale
●
●
●
●
●
DIY ISP
Problems:
● No Budget
● No Number Ressources
● No Hardware
● No Colo
● No Transit
● No Peering
How it began
First idea in November 2013
Freifunk Rheinland e.V. became a LIR in August 2014
First Deployments in September 2014
First deployment
Weekend in September 2014:
Frankfurt (Interxion):
2x Supermicro, Xeon 5405, 4GB RAM, 4x SAS HDD RAID-1
Arch Linux, Quagga
2x 1Gbit/s Transit from a friends former employer
Berlin (Speedbone):
2x HP DL320 Gen8, Xeon E3-1220, 8GB RAM, SD Card
Arch Linux, Quagga
2x 1Gbit/s Transit from IN-Berlin AS29670
Deployment #2
Düsseldorf (Interxion):
2x HP DL320 Gen8, Xeon E3-1220, 8GB RAM, SD Card
Arch Linux, Quagga
2x 1Gbit/s Transit from rrbone AS39138
End of 2014
Problems in Q1/2015
Inter-POP connectivity = GRE
1G circuits are not big pipes
Transit is nice but we’d ❤ to peer
XCONs limited or impossible in some of our locations
Quagga sucks
Arch sucks (at least for our usecase)
Solutions (not in chronological order)
Move FRA POP to another location
Move DUS POP to another location
BCIX sponsored 10G port in BER
ECIX sponsored 10G ports in FRA, DUS, BER, HAM (used by Freifunk Hamburg)
ECIX sponsored 1G L2VPN between all Sites
NLix sponsored 1G ports in FRA, DUS, BER
Somehow we are on DECIX FRA (10G)
Community-IX in Berlin emerged (10G)
Replaced Quagga with BIRD
Replaced Arch with Debian
Replaced Debian Kernel with CentOS Kernel
First approach to 10GE (HP NetXen)
Mellanox ConnectX on Kernel 4.2
for interface in `awk -F: '/eth/ {print $1}' /proc/net/dev`; do
/sbin/ethtool -K $interface tx off
/sbin/ethtool -K $interface gro off
/sbin/ethtool -K $interface gso off
/sbin/ethtool -K $interface tso off
/sbin/ethtool -K $interface sg off
done;
Result
Solution: Downgrade
takt@bb-a.ix.dus.de.ffrl.de ~ % uname -a
Linux bb-a.ix.dus.de.ffrl.de 3.10.0-229.14.1.el7.x86_64 #1 SMP Tue Sep 15
15:05:51 UTC 2015 x86_64 GNU/Linux
takt@bb-a.ix.dus.de.ffrl.de ~ % cat /etc/debian_version
8.5
Quagga at work
Replaced with BIRD. No pain.
fra2.fra.de.ffrl.de
ix.dus.de.ffrl.de (and some more)
Todo since Q3/2016
Traffic Level
06.05.2017
Many thanks to Sponsors and Supporters!

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AS201701 - Building an Internet backbone with pure 1he servers and Linux

  • 1.
  • 2.
  • 3. pberndro ➔ Philip Berndroth - philip@freifunk-rheinland.net ➔ Member of the board Freifunk Rheinland e.V. ➔ Run my own company with software and datacenter stuff ➔ Hungarian Gulash fan ➔ Twitter: @pberndro - Facebook: facebook.com/philip.berndroth
  • 4. Max ➔ Maximilian Wilhelm - max@rfc7511.org ➔ Senior Infrastructure Architect @ University of Paderborn ➔ SIA + Member of the board @ Freifunk Hochstift e.V. ➔ Open Source Hacker ➔ Fan of fine Whisky and Tiramisu ➔ Twitter: @BarbarossaTM - Facebook: facebook.com/Maxemann
  • 5. What is Freifunk and what does the FFRL? ● ● ● ● ●
  • 6. Bring the Internet to _all_ people
  • 7. Free wifi for refugees ● ● ● ● ●
  • 8. Build internet into the wild is hard... ● ● ● ● ●
  • 9.
  • 10.
  • 11.
  • 12.
  • 13.
  • 14. VPN providers don’t scale ● ● ● ● ●
  • 15. DIY ISP Problems: ● No Budget ● No Number Ressources ● No Hardware ● No Colo ● No Transit ● No Peering
  • 16. How it began First idea in November 2013 Freifunk Rheinland e.V. became a LIR in August 2014 First Deployments in September 2014
  • 17. First deployment Weekend in September 2014: Frankfurt (Interxion): 2x Supermicro, Xeon 5405, 4GB RAM, 4x SAS HDD RAID-1 Arch Linux, Quagga 2x 1Gbit/s Transit from a friends former employer Berlin (Speedbone): 2x HP DL320 Gen8, Xeon E3-1220, 8GB RAM, SD Card Arch Linux, Quagga 2x 1Gbit/s Transit from IN-Berlin AS29670
  • 18. Deployment #2 Düsseldorf (Interxion): 2x HP DL320 Gen8, Xeon E3-1220, 8GB RAM, SD Card Arch Linux, Quagga 2x 1Gbit/s Transit from rrbone AS39138
  • 20. Problems in Q1/2015 Inter-POP connectivity = GRE 1G circuits are not big pipes Transit is nice but we’d ❤ to peer XCONs limited or impossible in some of our locations Quagga sucks Arch sucks (at least for our usecase)
  • 21. Solutions (not in chronological order) Move FRA POP to another location Move DUS POP to another location BCIX sponsored 10G port in BER ECIX sponsored 10G ports in FRA, DUS, BER, HAM (used by Freifunk Hamburg) ECIX sponsored 1G L2VPN between all Sites NLix sponsored 1G ports in FRA, DUS, BER Somehow we are on DECIX FRA (10G) Community-IX in Berlin emerged (10G) Replaced Quagga with BIRD Replaced Arch with Debian Replaced Debian Kernel with CentOS Kernel
  • 22. First approach to 10GE (HP NetXen)
  • 23. Mellanox ConnectX on Kernel 4.2 for interface in `awk -F: '/eth/ {print $1}' /proc/net/dev`; do /sbin/ethtool -K $interface tx off /sbin/ethtool -K $interface gro off /sbin/ethtool -K $interface gso off /sbin/ethtool -K $interface tso off /sbin/ethtool -K $interface sg off done;
  • 25. Solution: Downgrade takt@bb-a.ix.dus.de.ffrl.de ~ % uname -a Linux bb-a.ix.dus.de.ffrl.de 3.10.0-229.14.1.el7.x86_64 #1 SMP Tue Sep 15 15:05:51 UTC 2015 x86_64 GNU/Linux takt@bb-a.ix.dus.de.ffrl.de ~ % cat /etc/debian_version 8.5
  • 26.
  • 27. Quagga at work Replaced with BIRD. No pain.
  • 28.
  • 33. Many thanks to Sponsors and Supporters!