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RIPE 62 Technical Report Erik Romijn <[email protected] > Senior Software Engineer Friday, May 6, 2011
| Date post: | 09-May-2015 |
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Technology |
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Erik Romijn - RIPE 62 2
Introduction
Friday, May 6, 2011
Erik Romijn - RIPE 62
Ben, Brian, Darius, Erik,
Menno, Paolo, Răzvan, Sjoerd
The Technical Team
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What Do We Do?
• If it has wires, it’s ours– (except for beamers, lighting, audio and stenography)
• Some highlights:– Local servers running DHCP, IRC, ripe62.ripe.net,
registration software, ...
– Webcasts / recordings
– (Wireless) network
– Presentation system
– Services centre
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What do we do?
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Network setup
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Public networkWireless
Terminal room
Service networkStreaming
TTM / Rosie
Private networkRegistrationNetwork mgt
RIPE meeting venue
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Network setup
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Network setup
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We need to be creative
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We need to be creative
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We need to be creative
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We need to be creative
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New setups
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Better cameras for plenary
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Better cameras for plenary
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Plasma screen setup
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Plasma screen setup
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Plasma screen setup
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LISP
• Separate SSID setup to experience LISP connectivity, IPv4 and IPv6
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Issues encountered
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IPv6 printing
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IPv6 printing
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IPv6 connectivity
• Several issues with IPv6 connectivity this time– RAs from LISP router together with Mac OS X bug
– Rogue 6to4 RAs from Windows box
– Issues in multicast traffic
• IPv6 debugging is difficult– Less experience than IPv4
– Wireless can influence the result
– All problems very intermittent
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IPv6 debugging is tricky
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dhcp-24-90:~ eromijn$ ndp -naNeighbor Linklayer Address Netif Expire St Flgs Prbs2001:67c:64:42:223:6cff:fe8a:2e8a 0:23:6c:8a:2e:8a en1 permanent R fe80::1%lo0 (incomplete) lo0 permanent R fe80::42:0:0:1%en1 0:0:5e:0:2:2a en1 23h59m59s S R fe80::223:6cff:fe8a:2e8a%en1 0:23:6c:8a:2e:8a en1 permanent R fe80::250:56ff:febc:7746%en1 0:50:56:bc:77:46 en1 9h13m31s S fe80::288c:82de:eb60:60ed%en1 0:24:d7:18:53:18 en1 5h11m3s S R
23h59m59s 23h57m40s 5s 40s
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Rogue RAs
• LISP router used public network for uplink
• Interface with autoconfigured address: receives address, then sends RAs from there...
• Enable ipv6 nd surpress-ra?
– No luck, only suppresses unsolicited RA - no way to disable solicited RA
• Set RA lifetime to zero– Mac OS X bug (fixed in Lion) treats this as
“infinite lifetime”
• Solution: disable IPv6 on interface25
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Rogue 6to4
• Windows laptop announcing 6to4 RA
• Shouldn’t affect anyone, because native is preferred
• Very difficult to find, despite not being Apple
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host goaway { hardware ethernet ..:..:..:..:53:18; deny booting; }
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Erik Romijn - RIPE 62
Multicast issues
• Effect: not getting an address, getting an address but not reaching first hop
• AP not sending (parts of) multicast traffic– Fixed by repatching: new patch, reboot of AP and reset of
switch port
• Probably not caused by filling up multicast channel
• Lots of mdns traffic
• Further causes unknown
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Other issues
• Newest model MacBook Pro can drop off wireless– Workaround reported by users: frequent pings
• Next meeting:– IPv6 RA filtering
– Consider mdns filtering
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Very long patches
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Very long patches
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Stats
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TTM Observations
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TTM Observations
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TTM Observations
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Internet Initiative Japan:
lower IPv6 than IPv4 latency
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DHCP lease vendors
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16% 11%
14%
59%
AppleHTCIntelOther / unknown
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Uplink traffic
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Peak: 48 Mbit/s in, 9 Mbit/s outAverage: 10 Mbit/s in, 2.5 Mbit/s out
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IPv6 traffic
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Peak: 35 Mbit/s in, 2 Mbit/s outAverage: 3 Mbit/s in, 144 kbit/s out
17.3% of uplink traffic is IPv6
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IPv6 traffic on the RIPE meeting network
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0
25
50
75
100
60 62 64 66 68 70 72 74 76 78 80 82 84
% o
f up
link
traf
fic b
eing
IPv6
RIPE meeting
Exponential Linear
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Wireless
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Peak: 450 associations
20 base stations deployed
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High-density access point distribution
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See you in Vienna!
Questions?Erik Romijn
Friday, May 6, 2011
