public void setNetmask(String netmask) {
        this.netmask = netmask;
    }
<p>
The netmask used to divide the IP address into subnets.
</p>

@param netmask
       The netmask used to divide the IP address into subnets.
aws-java-sdk-snowdevicemanagement/src/main/java/com/amazonaws/services/snowdevicemanagement/model/PhysicalNetworkInterface.java