[Lab] 6to4 Tunnels
1
Pre-requisite Reading
• RFC 3056 – Connection of IPv6 Domains
via IPv4 Clouds
• Y. Hei and K. Yamazaki, " Traffic analysis
and worldwide operation of open 6to4
relays for IPv6 deployment", Proceedings
of 2004 International Symposium on
Applications and the Internet (SAINT
2004), pp.265-268.
– Authors from KDDI, Japan.
2
Network Environment
• If you get a native IPv6 address, you don’t
need a 6to4 tunnel.
• If you get a private IPv4 address, 6to4
tunnel cannot be created.
– Configure your IPv4 address to 163.22.30.xx.
– Now you see the 6to4 interface.
3
6to4 Tunnel Interface
163.22.30.8
192.88.99.1
(RFC 3068)
4
Try to ping each other
• Capture the ICMPv6 packets, and mail to
me.
• What is your capture filter?
– ip6?
– ip?
Routing to 2002:: is easy
2002:8C6E:C7FA:2::5
2002:83F3:812C:1::3
6to4
Router1
IPv6
Network
Network prefix:
6to4
Router2
IPv4
E0
131.243.129.44
IPv6
Network
140.110.199.250
Network prefix:
2002:83F3:812C::/48
E0
2002:8C6E:C7FA::/48
IPv4 SRC
131.243.129.44
IPv4 DEST
140.110.199.250
IPv6 SRC
2002:83F3:812C:1::3
IPv6 DEST
2002:8C6E:C7FA:2::5
IPv6 SRC
2002:83F3:812C:1::3
IPv6 DEST
2002:8C6E:C7FA:2::5
IPv6 SRC
2002:83F3:812C:1::3
IPv6 DEST
2002:8C6E:C7FA:2::5
Data
Data
Data
6
How about 2001:: ?
2002:83F3:812C:1::3
6to4
Router1
6to4 Relay
Router
IPv4
192.88.99.1
2001:48a8:68fe::151
2002::/16
IPv4
6to4 Relay
Router
2002::/16
192.88.99.1
IPv6 Network
ping6 www.ncnu.edu.tw
8
Capture Filter of Wireshark
• ip host 192.88.99.1
• host 192.88.99.1 or host 192.88.115.135
• ip[9]==41
9
traceroute6
•
Tracing route to www.ncnu.edu.tw [2001:e10:6840:67:4c33:e188:4d59:364f]
from 2002:a316:1e08::a316:1e08 over a maximum of 30 hops:
–
–
–
–
–
–
–
•
1
15 ms
14 ms
19 ms 2002:a319:f6fb::1
2
18 ms
24 ms
23 ms 2001:288:0:1659:192:83:196:111
3
22 ms
18 ms
23 ms 2001:288:0:f:111::1
4
231 ms
301 ms
283 ms 2001:e10:ffff:101::1
5
236 ms
230 ms
231 ms 2001:e10:ffff:1a00::1
6
228 ms
234 ms
228 ms 2001:e10:ffff:1a01::2
7
291 ms
319 ms
229 ms www.ncnu.edu.tw
[2001:e10:6840:67:4c33:e188:4d59:364f]
traceroute6 to 2002:a316:1e08::a316:1e08 (2002:a316:1e08::a316:1e08)
from 2001:e10:6840:20:204:76ff:fee2:b1bd, 64 hops max, 12 byte packets
–
–
–
–
–
–
–
–
–
–
–
1 2001:e10:6840:20::1 0.867 ms 0.743 ms 1.191 ms
2 2001:e10:6840:1::1 0.707 ms 0.699 ms 0.636 ms
3 2001:e10:ffff:1a01::1 0.699 ms 0.748 ms 0.966 ms
4 2001:e10:ffff:1100::2 201.968 ms 197.438 ms 208.527 ms
5 2001:e10:ffff:300::1 240.724 ms 196.756 ms 287.042 ms
6 2001:e10:ffff:304::2 182.370 ms 182.350 ms 182.361 ms
7 xe-0-1-3.0.rtr.wash.net.internet2.edu 341.875 ms 425.605 ms 343.927 ms
8 internet2-virt-internet2-xe-0-0-0-506.3rox.net 213.375 ms 213.238 ms
213.274 ms
9 bar-internet2-ge-1-2-0-585.3rox.net 213.523 ms 214.209 ms 213.940 ms
10 6to4-bar-f4-0.3rox.net 213.620 ms 213.494 ms 218.251 ms
11 2002:a316:1e08::a316:1e08 236.394 ms 229.709 ms 230.471 ms
10
traceroute
•
tracert 192.88.99.1
–
–
–
–
•
1
2
3
4
9
7
5
14
ms
ms
ms
ms
5
5
10
16
ms
ms
ms
ms
10
5
4
16
ms
ms
ms
ms
10.102.1.254
ip098.puli255-64-203.ncnu.edu.tw [203.64.255.98]
ip091.puli255-64-203.ncnu.edu.tw [203.64.255.91]
192.88.99.1
tracert 192.88.115.135 (6to4-bar-f4-0.3rox.net)
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
1
4 ms
7
2
5 ms
6
3
5 ms
4
4
10 ms
9
5
10 ms
15
6
11 ms
10
7
44 ms
44
8
42 ms
41
9
155 ms
158
10
193 ms
155
[207.231.240.131]
11
187 ms
296
[64.57.28.97]
12
320 ms
210
[64.57.28.113]
13
325 ms
308
[64.57.28.7]
14
232 ms
301
[192.88.115.24]
15
252 ms
231
[192.88.115.54]
16
230 ms
235
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
4
4
4
11
10
10
41
52
170
155
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
10.102.1.254
ip098.puli255-64-203.ncnu.edu.tw [203.64.255.98]
ip091.puli255-64-203.ncnu.edu.tw [203.64.255.91]
bb-MOE-TWAREN.TANet.edu.tw [192.83.196.111]
202.169.174.58
202.169.174.110
202.169.174.149
tpr5-taiwan.jp.apan.net [203.181.248.154]
losa-tokyo-tp2.transpac2.net [192.203.116.145]
abilene-1-lo-jmb-702.lsanca.pacificwave.net
ms
188 ms
xe-0-1-0.0.rtr.hous.net.internet2.edu
ms
208 ms
xe-1-0-1.0.rtr.atla.net.internet2.edu
ms
306 ms
xe-1-1-3.0.rtr.wash.net.internet2.edu
ms
229 ms
internet2-virt-internet2-xe-0-0-0-506.3rox.net
ms
276 ms
bar-internet2-ge-1-2-0-585.3rox.net
ms
306 ms
6to4-bar-f4-0.3rox.net [192.88.115.135]
11
ping www.ipv6.tw
• Does your Windows 7/XP prefer to send
packets via IPv4 or IPv6?
• ping iptv.bupt.edu.cn
12
Further Reading
• Advisory Guidelines for 6to4 Deployment
draft-ietf-v6ops-6to4-advisory-01
• Request to move Connection of IPv6
Domains via IPv4 Clouds (6to4) to Historic
status
draft-ietf-v6ops-6to4-to-historic-03
13