Configuring a DHCPv6 snooping trusted port ··············································································· 164
Displaying and maintaining DHCPv6 snooping ············································································· 166
Network requirements ······································································································ 166
Configuration procedure ··································································································· 167
Verifying the configuration ································································································· 167
Overview ······························································································································ 168
Configuring static domain name resolution ············································································ 168
Configuring dynamic domain name resolution ········································································ 168
Setting the DSCP value for IPv6 DNS packets ············································································· 169
Network requirements ······································································································ 170
Configuration procedure ··································································································· 170
Network requirements ······································································································ 171
Configuration procedure ··································································································· 171
Overview ······························································································································ 176
IPv6 over IPv4 tunneling ··································································································· 176
IPv4 over IPv4 tunneling ··································································································· 178
IPv4 over IPv6 tunneling ··································································································· 179
IPv6 over IPv6 tunneling ··································································································· 180
Protocols and standards ··································································································· 180
Configuration guidelines ··································································································· 181
Configuration procedure ··································································································· 181
Configuration prerequisites ································································································ 182
Configuration guidelines ··································································································· 182
Configuration procedure ··································································································· 183
Configuration example ······································································································ 183
Configuring a 6to4 tunnel ········································································································· 187
Configuration prerequisites ································································································ 187
Configuration guidelines ··································································································· 187
Configuration procedure ··································································································· 187
Configuration example ······································································································ 188
Configuration prerequisites ································································································ 190
Configuration guidelines ··································································································· 190
Configuration procedure ··································································································· 191
Configuration example ······································································································ 192
Configuration prerequisites ································································································ 194
Configuration guidelines ··································································································· 194
Configuration procedure ··································································································· 195
Configuration example ······································································································ 195
Configuration prerequisites ································································································ 198
Configuration guidelines ··································································································· 198
Configuration procedure ··································································································· 199
Configuration example ······································································································ 199
Configuration prerequisites ································································································ 203
vii