Procedure

1. Configure global unicast IPv6 addresses for interfaces.
   # Configure Device A.

   <HUAWEI> system-view

   [~HUAWEI] sysname DeviceA

   [*HUAWEI] commit

   [~DeviceA] interface GigabitEthernet 0/1/0

   [~DeviceA-GigabitEthernet0/1/0] ipv6 enable

   [*DeviceA-GigabitEthernet0/1/0] ipv6 address 2001:db8::1 32

   [*DeviceA-GigabitEthernet0/1/0] undo shutdown

   [*DeviceA-GigabitEthernet0/1/0] commit

   [~DeviceA-GigabitEthernet0/1/0] quit

   # Configure Device B.

   <HUAWEI> system-view

   [~HUAWEI] sysname DeviceB

   [*HUAWEI] commit

   [~DeviceB] interface GigabitEthernet 0/1/0

   [~DeviceB-GigabitEthernet0/1/0] ipv6 enable

   [*DeviceB-GigabitEthernet0/1/0] ipv6 address 2001:db8::2 32

   [*DeviceB-GigabitEthernet0/1/0] undo shutdown

   [*DeviceB-GigabitEthernet0/1/0] commit

   [~DeviceB-GigabitEthernet0/1/0] quit
2. Verify the configuration.
   If you can view the configured unicast global addresses and that the interfaces and the IPv6 protocol are in the Up state, it indicates that the configuration is successful.
   # Display the interface information of Device A.

   [~DeviceA] display ipv6 interface GigabitEthernet 0/1/0

   GigabitEthernet0/1/0 current state : UP

   IPv6 protocol current state : UP

   link-local address is FE80::C964:0:B8B6:1

     Global unicast address(es):

       2001:db8::1, subnet is 2001:db8::/32

     Joined group address(es):

       FF02::1:FF00:1

       FF02::1:FFB6:1

       FF02::2

       FF02::1

     MTU is 4470 bytes

     ND DAD is enabled, number of DAD attempts: 1

     ND reachable time is 30000 milliseconds

     ND retransmit interval is 1000 milliseconds

     Hosts use stateless autoconfig for addresses

   # Display the interface information of Device B.

   [~DeviceB] display ipv6 interface GigabitEthernet 0/1/0

   GigabitEthernet0/1/0 current state : UP

   IPv6 protocol current state : UP

   link-local address is FE80::2D6F:0:7AF3:1

     Global unicast address(es):

       2001:db8::2, subnet is 2001:db8::/32

     Joined group address(es):

       FF02::1:FF00:2

       FF02::1:FFF3:1

       FF02::2

       FF02::1

     MTU is 4470 bytes

     ND DAD is enabled, number of DAD attempts: 1

     ND reachable time is 30000 milliseconds

     ND retransmit interval is 1000 milliseconds

     Hosts use stateless autoconfig for addresses

   # Ping the link-local address of Device B from Device A. Note that you need to use the parameter -i to specify the interface corresponding to the link-local address.

   [~DeviceA] ping ipv6 fe80::2d6f:0:7af3:1 -i GigabitEthernet 0/1/0

     PING FE80::2D6F:0:7AF3:1 : 56  data bytes, press CTRL_C to break

       Reply from FE80::2D6F:0:7AF3:1

       bytes=56 Sequence=1 hop limit=64  time = 60 ms

       Reply from FE80::2D6F:0:7AF3:1

       bytes=56 Sequence=2 hop limit=64  time = 50 ms

       Reply from FE80::2D6F:0:7AF3:1

       bytes=56 Sequence=3 hop limit=64  time = 50 ms

       Reply from FE80::2D6F:0:7AF3:1

       bytes=56 Sequence=4 hop limit=64  time = 30 ms

       Reply from FE80::2D6F:0:7AF3:1

       bytes=56 Sequence=5 hop limit=64  time = 1 ms
   
   

     --- FE80::2D6F:0:7AF3:1 ping statistics ---

       5 packet(s) transmitted

       5 packet(s) received

       0.00% packet loss

       round-trip min/avg/max = 1/38/60 ms

   # Ping the global unicast IPv6 address of Device B from Device A.

   [~DeviceA] ping ipv6 2001:db8::2

     PING 2001:db8::2 : 56  data bytes, press CTRL_C to break

       Reply from 2001:db8::2

       bytes=56 Sequence=1 hop limit=64  time = 30 ms

       Reply from 2001:db8::2

       bytes=56 Sequence=2 hop limit=64  time = 50 ms

       Reply from 2001:db8::2

       bytes=56 Sequence=3 hop limit=64  time = 50 ms

       Reply from 2001:db8::2

       bytes=56 Sequence=4 hop limit=64  time = 20 ms

       Reply from 2001:db8::2

       bytes=56 Sequence=5 hop limit=64  time = 40 ms
   
   

     --- 2001:db8::2 ping statistics ---

       5 packet(s) transmitted

       5 packet(s) received

       0.00% packet loss

       round-trip min/avg/max = 20/38/50 ms