Spoke Fails to Register with a Hub

Procedure

1. Check that the Spoke has reachable routes to the remote Spoke and the Hub.

   Run the display ip routing-table command to check whether there are routes to the remote end.

   • If there is no reachable route between the Spoke and Hub, check the configurations of routes on the Spoke and Hub. For the configurations of routes, see "IP Routing" in the Configuration Guide.
   • If there are reachable routes between the Spoke and Hub, go to step 2.

2. Check that configurations of the Spoke and Hub are correct.

   Run the display nhrp peer command on the Spoke and Hub to check NHRP mapping entries.

   If the Hub does not have dynamic NHRP mapping entries of the Spoke, run the display this command on mGRE tunnel interfaces of the Spoke and Hub to check whether the configurations on both ends are consistent. The following table lists the fields in the command output that you need to check the follow-up operations.

   Item	Check Standard and Operation
   nhrp authentication	Check whether NHRP authentication string configurations of the Spoke and Hub are the same. If they are different, run the nhrp authentication command to modify the configurations.
   nhrp entry	Check whether the static NHRP mapping entries on the Spoke contain the interface information of the Hub. If not, run the nhrp entry command to modify the configurations.