nhrp registration no-unique

Function

The nhrp registration no-unique command configures the device to override conflicting NHRP peer entries during NHRP registration.

The undo nhrp registration no-unique command restores the device to the default configuration.

By default, the device does not override conflicting NHRP peer entries during NHRP registration.

Format

nhrp registration no-unique

undo nhrp registration no-unique

Parameters

None

Views

Tunnel interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
nhrp	write

Usage Guidelines

Usage Scenario

When a spoke registers with the hub, the hub generates NHRP peer entries of the spoke. When the public network address of the spoke changes, it re-registers with the hub. The hub saves the latest NHRP peer entries of the spoke. In this case, you can run the nhrp registration no-unique command to enable the hub to override conflicting NHRP peer entries.

Prerequisites

The following operations have been performed:

Run the interface tunnel command to create a tunnel interface and display the tunnel interface view.
Run the tunnel-protocol gre p2mp command to set the tunnel encapsulation mode to mGRE.

Configuration Impact

The following situations occur when the spoke re-registers with the hub after the public address of the spoke is changed:

If the nhrp registration no-unique command is used on the spoke, the device overrides existing NHRP peer entries with new NHRP peer entries.
If the nhrp registration no-unique command is not configured on a spoke node, new NHRP peer entries will not override existing NHRP peer entries on a hub node and new registration entries will be discarded. New registration entries can successfully register only when old NHRP peer entries are aged out.

Example

# Configure the device to override conflicting NHRP peer entries during NHRP registration.

<HUAWEI> system-view
[~HUAWEI] nhrp enable
[*HUAWEI] interface tunnel 0
[*HUAWEI-Tunnel0] tunnel-protocol gre p2mp
[*HUAWEI-Tunnel0] nhrp enable
[*HUAWEI-Tunnel0] nhrp registration no-unique