Usage Scenario
This command configures the NHRP authentication string on a spoke and the hub. This command enables the hub to reject the illegal registration of a spoke.
Configuration Impact
After this command is executed on a spoke and the hub, the spoke sends an NHRP Registration Request packet to the hub, and the hub decides whether to process this packet based on the NHRP authentication string in the packet. If this NHRP authentication string is different from that configured on the hub, the hub does not process this packet. If the two NHRP authentication strings are the same, the hub processes this packet.
Precautions
If the NHRP authentication string is configured on a spoke but not on the hub, the hub does not authenticate the authentication string of the spoke. Instead, the spoke performs the authentication but the authentication fails.