华为ipv6-ipv4地址隧道无兼容ipv4

[AR8-Tunnel0/0/1]tunnel-protocol ipv6-ipv4 ?
  6to4         IPv6 automatic tunneling using 6to4
  auto-tunnel  IPv6 automatic tunneling using IPv4 compatible addresses
  isatap       IPv6 isatap tunneling
  <cr>         Please press ENTER to execute command
后面命令如果有这三个参数  6to4 auto-tunnel isatap 后面就没有这个命令destination

sy
sysname AR8
ipv6
ospfv3 1
router-id 1.1.1.1

interface GigabitEthernet0/0/0
ip address 10.10.10.1 255.255.255.0

interface Tunnel0/0/1
ipv6 enable
ipv6 address 2020::1/64
ospfv3 1 area 0.0.0.0
tunnel-protocol ipv6-ipv4
source GigabitEthernet0/0/0
destination 10.10.10.2

sy
sysname AR9
ipv6
ospfv3 1
router-id 2.2.2.2

interface GigabitEthernet0/0/0
ip address 10.10.10.2 255.255.255.0

interface GigabitEthernet0/0/1
ipv6 enable
ipv6 address 2001::1/64
ospfv3 1 area 0.0.0.0

interface Tunnel0/0/1
ipv6 enable
ipv6 address 2020::2/64
ospfv3 1 area 0.0.0.0
tunnel-protocol ipv6-ipv4
source GigabitEthernet0/0/0
destination 10.10.10.1