The ipv6 nd learning strict command enables IPv6 neighbor discovery (ND) strict learning.
The undo ipv6 nd learning strict command disables IPv6 ND strict learning.
By default, IPv6 ND strict learning is disabled.
In the system view:
ipv6 nd learning strict
undo ipv6 nd learning strict
In the interface view:
ipv6 nd learning strict { force-disable | force-enable | trust }
undo ipv6 nd learning strict
| Parameter | Description | Value |
|---|---|---|
| force-disable | Disables IPv6 ND strict learning forcibly. | - |
| force-enable | Enables IPv6 ND strict learning forcibly. | - |
| trust | Inherits the global setting of IPv6 ND strict learning. | - |
VLANIF interface view, VBDIF interface view, Eth-Trunk interface view, Eth-Trunk sub-interface view, system view
Usage Scenario
Generally, a device uses neighbor advertisement (NA) packets to establish neighbor entries. Run the ipv6 nd learning strict command to enable IPv6 ND strict learning. After you enable IPv6 ND strict learning on a device, the device uses NA packets only in response to neighbor solicitation (NS) packets to establish neighbor entries.
Prerequisites
Before using the ipv6 nd learning strict command to enable IPv6 neighbor discovery (ND) strict learning on an interface, ensure that the IPv6 function has been enabled on the interface using the ipv6 enable command.
Precautions
Before running this command in an Eth-Trunk view, run the undo portswitch command to switch the Eth-Trunk to a Layer 3 interface. For the models supporting switching between Layer 2 and Layer 3 modes, see portswitch.
After you run the ipv6 nd learning strict command on a device, the device synchronizes fake entries. Synchronizing a large number of fake entries affects device performance. Therefore, you are advised to use the command only for protocol consistency tests.
# Enable IPv6 ND strict learning globally.
<HUAWEI> system-view [HUAWEI] ipv6 nd learning strict
# Enable IPv6 ND strict learning on VLANIF 100 forcibly.
<HUAWEI> system-view [HUAWEI] ipv6 [HUAWEI] interface vlanif 100 [HUAWEI-Vlanif100] ipv6 enable [HUAWEI-Vlanif100] ipv6 nd learning strict force-enable