The ikev2 initial-contact enable command enables the device to send the INITIAL_CONTACT notify payload in the first IKE_AUTH request.
The undo ikev2 initial-contact enable command disables the device from sending the INITIAL_CONTACT notify payload in the first IKE_AUTH request.
By default, the device is disabled to send the INITIAL_CONTACT notify payload in the first IKE_AUTH request.
The INITIAL_CONTACT notify payload asserts that an IKE SA is the only active IKE SA between a pair of IKE peers. By default, the device will delete the old IKE SA without the INITIAL_CONTACT notify payload after the new IKE SA is created. When the remote end requires the INITIAL_CONTACT notify payload to delete the old IKE SA, configure this command.
When the local device restarts or expects to use the current IKE SA for establishing an IPSec tunnel only, run this command to enable the device to send the INITIAL_CONTACT notify payload in the first IKE_AUTH request so that the remote device deletes the old IKE SA.