Question: What action can an eNodeB (eNB) take if it doesn't receive either an `ENB CONFIGURATION UPDATE ACKNOWLEDGE` or an `ENB CONFIGURATION UPDATE FAILURE` message after initiating an eNB Configuration Update procedure towards a Mobility Management Entity (MME)?
Option 1: The eNB must wait for a predefined timeout before taking any further action.
Option 2: The eNB can initiate a new eNB Configuration Update procedure with updated content.
Option 3: The eNB may reinitiate the eNB Configuration Update procedure with the same content as the previous unacknowledged message.
Option 4: The eNB should terminate its connection with the MME and establish a new one.
Explanation: This is because, according to specified behavior for abnormal conditions, if an acknowledgement or failure message is not received after initiating an update procedure, the eNB has the flexibility to reattempt the procedure under the condition that the new message's content remains identical to the unacknowledged one. This approach ensures consistency and allows for potential network issues to be overcome without altering the intended configuration update.