Chapter 2 How to Set Up Your Network
ZyWALL USG 20-2000 User’s Guide
47
2.7.4 Testing the 6to4 Tunnel
1
Connect a computer to the ZyWALL’s LAN1.
2
Enable IPv6 support on you computer.
In Windows XP, you need to use the
IPv6 install
command in a Command Prompt.
In Windows 7, IPv6 is supported by default. You can enable IPv6 in the
Control Panel
>
Network
and Sharing Center
>
Local Area Connection
screen.
3
You should get an IPv6 IP address starting with 2002:7a64:dcee:1:.
4
Type
ping -6 ipv6.google.com
in a Command Prompt to test. You should get a response.
2.7.5 What Can Go Wrong?
1
Do not enable Auto-Configuration for the LAN1 IPv6 interface. Enabling it will cause two default
routes, however, the ZyWALL only needs a default route generated by your relay router setting.
In 6to4, the ZyWALL doesn’t need a policy route to determine where to forward a 6to4 packet
(starting with 2002 in the IPv6 IP address). The next gateway information of where to forward a
6to4 packet can be retrieved from the packet’s destination IP address. The ZyWALL only forwards a
6to4 packet to the relay router using the default route if the packet’s destination is not an IP
address starting with 2002.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
