组网拓扑：
用0口拨号，已获得ipv6全球单播地址，但1口获得ipv6地址
#
ipv6 dhcp pool wan6
option-group 1
#
interface Dialer0
mtu 1492
ppp chap password cipher 密码
ppp chap user 账号
ppp ipcp dns admit-any
ppp ipcp dns request
ppp pap local-user 账号 password cipher 密码
dialer bundle enable
dialer-group 1
dialer timer idle 0
dialer timer autodial 5
ip address ppp-negotiate
nat outbound description GuideNat
ipv6 address auto
ipv6 address auto link-local
ipv6 dhcp client pd 1 rapid-commit option-group 1
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interface GigabitEthernet1/0/1
port link-mode route
description GuideLan Interface
combo enable copper
duplex full
speed 1000
ip address 10.0.0.1 255.255.252.0
ipv6 dhcp select server
ipv6 dhcp server apply pool wan6
ipv6 address auto
ipv6 address dhcp-alloc
ipv6 nd autoconfig other-flag
undo ipv6 nd ra halt
