Example for Configuring IPv6 Neighbor Discovery

This section provides an example for configuring IPv6 neighbor discovery.

Networking Requirements

As shown in Figure 1, DeviceA is directly connected to the PC by GE 0/1/0.

Figure 1 Configuring IPv6 neighbor discovery

Precautions

None.

Configuration Roadmap

The configuration roadmap is as follows:

Configure a link-local unicast address and global EUI-64 unicast addresses on GE 0/1/0.
Configure the RA prefix message to be advertised on GE 0/1/0 and enable the advertisement of the RA prefix message.

Data Preparation

To complete the configuration, you need the following data:

Local unicast addresses of the link and global EUI-64 on GE 0/1/0
RA prefix message to be advertised

Procedure

Configure the local unicast address of the link on GE 0/1/0. After the ipv6 enable command is run on an interface, the system automatically generates a link-local address for the interface.

<HUAWEI> system-view
[~HUAWEI] sysname DeviceA
[*HUAWEI] commit
[~DeviceA] interface gigabitethernet 0/1/0
[~DeviceA-GigabitEthernet0/1/0] undo shutdown
[*DeviceA-GigabitEthernet0/1/0] ipv6 enable
[*DeviceA-GigabitEthernet0/1/0] ipv6 address auto link-local
[*DeviceA-GigabitEthernet0/1/0] commit

Configure the local unicast address of the EUI-64 site on GE 0/1/0 and the prefix in the RA message.

A PC can automatically obtain the RA prefix message from devices only after the RA prefix message to be advertised is configured and the advertisement of the RA prefix message is enabled on devices.
```
[~DeviceA-GigabitEthernet0/1/0] ipv6 address 2001:db8::/32 eui-64
[*DeviceA-GigabitEthernet0/1/0] ipv6 nd ra prefix 2001:db8::/32 1000 1000
[*DeviceA-GigabitEthernet0/1/0] undo ipv6 nd ra halt
[*DeviceA-GigabitEthernet0/1/0] commit
[~DeviceA-GigabitEthernet0/1/0] quit
```

Verify the configuration.

If configurations are successful, you can view the configured local unicast address of the link and the global EUI-64 and find that GE 0/1/0 is Up and IPv6 is Up.

# Display information about interfaces of devices.

[~DeviceA-GigabitEthernet0/1/0] display this ipv6 interface
GigabitEthernet0/1/0 current state : UP
IPv6 protocol current state : UP
IPv6 is enabled, link-local address is FE80::2E0:FCFF:FE7D:A497
  Global unicast address(es):
    2001:db8::2E0:FCFF:FE7D:A497, subnet is 2001:db8::/32
  Joined group address(es):
    FF02::1:FF7D:A497
    FF02::2
    FF02::1
  MTU is 1500 bytes
  ND DAD is enabled, number of DAD attempts: 1
  ND reachable time is 1200000 milliseconds
  ND retransmit interval is 1000 milliseconds
  ND advertised reachable time is 0 milliseconds
  ND advertised retransmit interval is 0 milliseconds
  ND router advertisement max interval 600 seconds, min interval 200 seconds
  ND router advertisements live for 1800 seconds
  Hosts use stateless autoconfig for addresses

# Display information about PCs.

GigabitEthernet adapter 1:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : Realtek RTL8139 Family PCI Fast Ethe
rnet NIC #2
        Physical Address. . . . . . . . . : 00-E0-FC-77-A1-B6
        Dhcp Enabled. . . . . . . . . . . : No
        IP Address. . . . . . . . . . . . : 10.1.1.33
        Subnet Mask . . . . . . . . . . . : 255.0.0.0
        IP Address. . . . . . . . . . . . : 2001:db8::78b3:4397:c0c4:f078
        IP Address. . . . . . . . . . . . : 2001:db8::2e0:4cff:fe77:a1b6
        IP Address. . . . . . . . . . . . : fe80::2e0:4cff:fe77:a1b6%6
        Default Gateway . . . . . . . . . : fe80::288:ff:fe10:b%6
        DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
                                            fec0:0:0:ffff::2%1
                                            fec0:0:0:ffff::3%1

# Ping the local unicast address of the link on the PC from the device with the use of the parameter -i which specifies the interface corresponding to the local unicast address.

[~DeviceA-GigabitEthernet0/1/0] ping ipv6 fe80::2e0:4cff:fe77:a1b6 -i gigabitethernet0/1/0
PING FE80::2E0:4CFF:FE77:A1B6: 56 data bytes, press CTRL_C to break
  Reply from FE80::2E0:4CFF:FE77:A1B6
  bytes=56 Sequence=1 hop limit=64 time = 60 ms
  Reply from FE80::2E0:4CFF:FE77:A1B6
  bytes=56 Sequence=2 hop limit=64 time = 50 ms
  Reply from FE80::2E0:4CFF:FE77:A1B6
  bytes=56 Sequence=3 hop limit=64 time = 50 ms
  Reply from FE80::2E0:4CFF:FE77:A1B6
  bytes=56 Sequence=4 hop limit=64 time = 30 ms
  Reply from FE80::2E0:4CFF:FE77:A1B6
  bytes=56 Sequence=5 hop limit=64 time = 1 ms
--- FE80::2E0:4CFF:FE77:A1B6 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 local unicast address of global EUI-64 of the PC from the device.

[~DeviceA-GigabitEthernet0/1/0] ping ipv6 2001:db8::78b3:4397:c0c4:f078
PING 2001:db8::78B3:4397:C0C4:F078 : 56 data bytes, press CTRL_C to break
  Reply from 2001:db8::78B3:4397:C0C4:F078
  bytes=56 Sequence=1 hop limit=64 time = 30 ms
  Reply from 2001:db8::78B3:4397:C0C4:F078
  bytes=56 Sequence=2 hop limit=64 time = 50 ms
  Reply from 2001:db8::78B3:4397:C0C4:F078
  bytes=56 Sequence=3 hop limit=64 time = 50 ms
  Reply from 2001:db8::78B3:4397:C0C4:F078
  bytes=56 Sequence=4 hop limit=64 time = 20 ms
  Reply from 2001:db8::78B3:4397:C0C4:F078
  bytes=56 Sequence=5 hop limit=64 time = 40 ms
--- 2001:db8::78B3:4397:C0C4:F078 ping statistics ---
  5 packet(s) transmitted
  5 packet(s) received
  0.00% packet loss
  round-trip min/avg/max = 20/38/50 ms

Configuration Files

DeviceA configuration file

#
 sysname DeviceA
#
interface GigabitEthernet0/1/0
 undo shutdown
 ipv6 enable
 ipv6 nd ra prefix 2001:db8::/32 1000 1000
 ipv6 address 2001:db8::/32 eui-64
 undo ipv6 nd ra halt
#
return