viii
DHCPv6 snooping configuration example ················································································································ 198
Network requirements ········································································································································· 198
Configuration procedure ···································································································································· 198
Verifying the configuration ································································································································· 199
Configuring tunneling ············································································································································· 200
Overview ······································································································································································· 200
IPv6 over IPv4 tunneling ····································································································································· 200
IPv4 over IPv4 tunneling ····································································································································· 202
IPv4 over IPv6 tunneling ····································································································································· 203
IPv6 over IPv6 tunneling ····································································································································· 204
Protocols and standards ····································································································································· 204
Tunneling configuration task list ································································································································· 205
Configuring a tunnel interface ···································································································································· 205
Configuring an IPv6 over IPv4 manual tunnel ··········································································································· 206
Configuration example ······································································································································· 207
Configuring a 6to4 tunnel ··········································································································································· 209
Configuration example ······································································································································· 210
Configuring an ISATAP tunnel ···································································································································· 212
Configuration example ······································································································································· 213
Configuring an IPv4 over IPv4 tunnel ························································································································ 215
Configuration example ······································································································································· 216
Configuring an IPv4 over IPv6 tunnel ························································································································ 218
Configuration example ······································································································································· 219
Configuring an IPv6 over IPv6 tunnel ························································································································ 221
Configuration example ······································································································································· 222
Displaying and maintaining tunneling ······················································································································· 224
Troubleshooting tunneling ··········································································································································· 224
Symptom ······························································································································································· 224
Analysis ································································································································································ 225
Solution ································································································································································· 225
Configuring GRE ····················································································································································· 226
Overview ······································································································································································· 226
GRE encapsulation format ·································································································································· 226
GRE tunnel operating principle ·························································································································· 227
Protocols and standards ····································································································································· 227
Configuring a GRE over IPv4 tunnel ·························································································································· 227
Configuring a GRE over IPv6 tunnel ·························································································································· 229
Displaying and maintaining GRE ······························································································································· 231
GRE configuration examples ······································································································································ 232
GRE over IPv4 tunnel configuration example ··································································································· 232
GRE over IPv6 tunnel configuration example ··································································································· 234
Troubleshooting GRE ··················································································································································· 237
Symptom ······························································································································································· 237
Analysis ································································································································································ 237
Solution ································································································································································· 238
Support and other resources ·································································································································· 239
Contacting HP ······························································································································································ 239
Subscription service ············································································································································ 239
Related information ······················································································································································ 239
Documents ···························································································································································· 239
Websites ······························································································································································· 239
Conventions ·································································································································································· 240
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