public VpnTunnelOptionsSpecification withPhase1LifetimeSeconds(Integer phase1LifetimeSeconds) {
        setPhase1LifetimeSeconds(phase1LifetimeSeconds);
        return this;
    }
<p>
The lifetime for phase 1 of the IKE negotiation, in seconds.
</p>
<p>
Constraints: A value between 900 and 28,800.
</p>
<p>
Default: <code>28800</code>
</p>

@param phase1LifetimeSeconds
       The lifetime for phase 1 of the IKE negotiation, in seconds.</p>
       <p>
       Constraints: A value between 900 and 28,800.
       </p>
       <p>
       Default: <code>28800</code>
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/VpnTunnelOptionsSpecification.java