public VpnTunnelOptionsSpecification withStartupAction(String startupAction) {
        setStartupAction(startupAction);
        return this;
    }
<p>
The action to take when the establishing the tunnel for the VPN connection. By default, your customer gateway
device must initiate the IKE negotiation and bring up the tunnel. Specify <code>start</code> for Amazon Web
Services to initiate the IKE negotiation.
</p>
<p>
Valid Values: <code>add</code> | <code>start</code>
</p>
<p>
Default: <code>add</code>
</p>

@param startupAction
       The action to take when the establishing the tunnel for the VPN connection. By default, your customer
       gateway device must initiate the IKE negotiation and bring up the tunnel. Specify <code>start</code> for
       Amazon Web Services to initiate the IKE negotiation.</p>
       <p>
       Valid Values: <code>add</code> | <code>start</code>
       </p>
       <p>
       Default: <code>add</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