viiIPv6 features ························································································································································· 174IPv6 addresses ····················································································································································· 175IPv6 ND protocol ················································································································································· 178IPv6 path MTU discovery···································································································································· 180IPv6 transition technologies········································································································································· 180Dual stack ····························································································································································· 180Tunneling ······························································································································································ 181NAT-PT ·································································································································································· 1816PE ········································································································································································ 181Protocols and standards ·············································································································································· 181IPv6 basics configuration task list ······························································································································· 182Assigning IPv6 addresses to interfaces ······················································································································ 183Configuring an IPv6 global unicast address ···································································································· 183Configuring an IPv6 link-local address ············································································································· 185Configuring an IPv6 anycast address ··············································································································· 186Configuring IPv6 ND ··················································································································································· 186Configuring a static neighbor entry ·················································································································· 186Setting the maximum number of dynamic neighbor entries············································································ 187Setting the aging timer for ND entries in stale state ························································································ 187Minimizing link-local ND entries························································································································ 188Setting the hop limit ············································································································································ 188Configuring parameters for RA messages ········································································································ 188Configuring the maximum number of attempts to send an NS message for DAD ······································· 191Enabling ND proxy ············································································································································· 191Configuring path MTU discovery ······························································································································· 193Configuring the interface MTU ·························································································································· 193Configuring a static path MTU for a specific IPv6 address ············································································ 193Configuring the aging time for dynamic path MTUs ······················································································· 193Controlling sending ICMPv6 packets ························································································································· 194Configuring the rate limit for ICMPv6 error messages ···················································································· 194Enabling replying to multicast echo requests ··································································································· 194Enabling sending ICMPv6 destination unreachable messages ······································································ 194Enabling sending ICMPv6 time exceeded messages ······················································································ 195Enabling sending ICMPv6 redirect messages ·································································································· 195Specifying the source address for ICMPv6 packets ································································································· 196Displaying and maintaining IPv6 basics ··················································································································· 196IPv6 basics configuration example ···························································································································· 198Network requirements ········································································································································· 198Configuration procedure ···································································································································· 199Verifying the configuration ································································································································· 199Troubleshooting IPv6 basics configuration ················································································································ 203Symptom ······························································································································································· 203Solution ································································································································································· 203DHCPv6 overview ··················································································································································· 204DHCPv6 address/prefix assignment ·························································································································· 204Rapid assignment involving two messages······································································································· 204Assignment involving four messages ················································································································· 204Address/prefix lease renewal ···································································································································· 205Stateless DHCPv6 ························································································································································· 206Protocols and standards ·············································································································································· 206Configuring the DHCPv6 server ····························································································································· 207Overview······································································································································································· 207IPv6 address assignment ···································································································································· 207