code: func OptionNetworkControlPlaneMTU(exp int) Option {
  	return func(c *Config) {
  		logrus.Debugf("Network Control Plane MTU: %d", exp)
  		if exp < warningThNetworkControlPlaneMTU {
  			logrus.Warnf("Received a MTU of %d, this value is very low, the network control plane can misbehave,"+
  				" defaulting to minimum value (%d)", exp, minimumNetworkControlPlaneMTU)
  			if exp < minimumNetworkControlPlaneMTU {
  				exp = minimumNetworkControlPlaneMTU
  			}
  		}
  		c.Daemon.NetworkControlPlaneMTU = exp
  	}
  }
docs: // OptionNetworkControlPlaneMTU function returns an option setter for control plane MTU