Mobike support added from VIA 2.3.2 and the controller should be running AOS 220.127.116.11 and above.
With MOBIKE support, if the physical IP address changes due to interface change or changes on the same interface, VIA detects for any available interface to reach the controller. If an interface exist, VIA switches tunnel using new the IP address and avoids full IKE negotiation. MOBIKE helps reduce stress on the controller by avoiding full IKE negotiation especially when user is roaming.
No specific configuration is needed on the controller for this feature.
Existing SA's will not break due to interface or IP change.