def update_ssl_termination(self, loadbalancer, securePort=None, enabled=None,
            secureTrafficOnly=None):
        """
        Updates existing SSL termination information for the load balancer
        without affecting the existing certificates/keys.
        """
        ssl_info = self.get_ssl_termination(loadbalancer)
        if not ssl_info:
            raise exc.NoSSLTerminationConfiguration("You must configure SSL "
                    "termination on this load balancer before attempting "
                    "to update it.")
        if securePort is None:
            securePort = ssl_info["securePort"]
        if enabled is None:
            enabled = ssl_info["enabled"]
        if secureTrafficOnly is None:
            secureTrafficOnly = ssl_info["secureTrafficOnly"]
        uri = "/loadbalancers/%s/ssltermination" % utils.get_id(loadbalancer)
        req_body = {"sslTermination": {
                "enabled": enabled,
                "secureTrafficOnly": secureTrafficOnly,
                "securePort": securePort,
                }}
        resp, body = self.api.method_put(uri, body=req_body)
        return body