title E2T Shutdown flow R4

participant E2T\nKeepAlive\nWorker as W
participant E2T\nShutdown\nManager as SDM
participant E2tInnstances\nManager as IM
participant Associaton\nManager as AM
participant Rnib\nDataService as RNIB
participant Routing\nManager as RM

W->SDM: Shutdown
note over SDM: Mark e2tInstance as 'to be deleted' 
loop associated RANs
    SDM->RNIB: GetNodeb
    note over SDM: Set Status = DISCONNECTED\nAssociatedE2TInstanceAddress = ""
    SDM->RNIB: UpdateNodeb
end
SDM->AM: RemoveE2tInstance
AM->RM: DeleteE2TInstance
AM->IM: RemoveE2TInstance