@Override
  public void setTcpPort(int port) {
    checkReadOnly();
    tcpPort = port;
    configChanged();
  }
Sets the Distributed System property membership-port-range

@param membershipPortRangeStr the value for membership-port-range given as two numbers
       separated by a minus sign.
geode-core/src/main/java/org/apache/geode/admin/internal/DistributedSystemConfigImpl.java