Root Bridge can see NonRoot Bridges but does not Associate
This is a point-to-multipoint bridging LAN for networking eight serial devices (air quality monitors) to a central Windows box for real-time wireless data acquisition. Thus far, I have configured a single Aironet 1310 as the root bridge (RB: 150.100.0.2, 255.255.0.0) at the Windows box (PC: 150.100.0.1, 255.255.0.0) and three Aironet 1310s as non-root bridges (NRB1: 150.100.0.3; NRB2: 150.100.0.4; NRB3: 150.100.0.5). When the system's working, each of the NRBs will connect to an ethernet-to-serial device server with its own IP, and the serial devices will connect to the device servers as COM2-COM9, respectively. Each node in this network has an external antenna, an omni at the RB and directional/Yagi antennae at the NRBs. Distances are short, hundreds of meters, so power will not be the limiting factor. (We could have done this with Zigbee but decided to overdesign for reliability.)
After assigning IP addresses to all four bridges using the command-line interface, and with the RB connected to an ethernet hub/switch, we configured each of the NRBs by connecting them to the same hub/switch and using the browser interface. We used the document at
http://www.cisco.com/application/pdf/paws/68087/bridges_pt_to_pt.pdf
and followed it to the letter to configure first the RB, then the NRBs.
After configuring all four bridges, and while all four were still hard-wired together through the hub/switch, all four bridges showed the proper associations in the "State" column of the web interface under "Association." To test the wireless links we disconnected the three NRBs from the hub/switch by removing the ethernet cables, leaving the RB connected to the hub/switch (naturally) to maintain connection to the host PC. We then refreshed all associations.
On the RB web interface, all three NRBs showed up with the proper IP addresses, but the "State" fields showed "Attempting Association" or something like that rather than "EAP-Associated."
All three NRB web interfaces disappeared because the links were lost. I tried to PING each of the IP addresses using a DOS command, but all three timed out.
So, in short, the RB can "see" all three NRBs and "knows" they're there; but the association does not complete. What are my options for diagnosing the problem?
Thanks in advance...
Brent Auvermann
Amarillo, TX
Chieu Dinh,
For the non-root bridge, is there a way to set the scan? I can see in the log file shows that the scan is starting when I changed from Install to non-root bridge. Once I am on the non-root bridge role, I don't see any more the log for scanning.
I don't know about any command that controls the scanning interval when the bridge is in non-root mode. I also don't think it logs every time it goes into a scan cycle because I think they're pretty close together, maybe at most a few seconds.
My question is "is there some ways that I can initiate the scan on the non-root bridge?
You can shut/no-shut the non-root bridge radio interface. Every time you do this it intiates a new scan immediately.
can I use the "parent" command on the point-to-multipoint environment?
As far as I know, yes. I think the only mode parent doesn't work in is repeater mode. For repeaters, you don't configure a list of parents, you only configure one single MAC peer.
An added thought: if you are having trouble with the bridge link coming up, then there is likely either a signal or a configuration issue (and chasing the scan interval probably won't net you any solutions). I've found that a great way to narrow the troubleshooting is to configure the bridges on the ground at close range (maybe 50-100 feet apart, not right up against each other) to control for signal. Once you have a working configuration and you know for sure that the bridges will come up, then install them in your outdoor locations. Keep in mind that when outdoors, a lot of factors can play into signal claritiy and usability (trees/foliage, distance, LOS/fresnel, earth curvature, weather, noise and interference, etc.). Also, unfortunately for the 1310s, the 2.4GHz space is really congested in most populated areas so they are not a reliable solution unless you're out in the country. Always survey first.
Justin
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Compiles but does not execute as expected????
Here is my code. I can compile and execute but does not perform as expected What do I need to change?
import java.io.;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.NumberFormat;
import java.math.*;
public class CalcTest extends JFrame implements ActionListener, ItemListener
public JMenuBar createMenuBar()
JMenuBar mnuBar = new JMenuBar();
setJMenuBar(mnuBar);
//Create File & add Exit
JMenu mnuFile = new JMenu("File", true);
mnuFile.setMnemonic(KeyEvent.VK_F);
mnuFile.setDisplayedMnemonicIndex(0);
mnuBar.add(mnuFile);
JMenuItem mnuFileExit = new JMenuItem("Exit");
mnuFileExit.setMnemonic(KeyEvent.VK_F);
mnuFileExit.setDisplayedMnemonicIndex(1);
mnuFile.add(mnuFileExit);
mnuFileExit.setActionCommand("Exit");
mnuFileExit.addActionListener(this);
JMenu mnuFunction = new JMenu("Function", true);
mnuFunction.setMnemonic(KeyEvent.VK_F);
mnuFunction.setDisplayedMnemonicIndex(0);
mnuBar.add(mnuFunction);
JMenuItem mnuFunctionClear = new JMenuItem("Clear");
mnuFunctionClear.setMnemonic(KeyEvent.VK_F);
mnuFunctionClear.setDisplayedMnemonicIndex(1);
mnuFunction.add(mnuFunctionClear);
mnuFunctionClear.setActionCommand("Clear");
mnuFunctionClear.addActionListener(this);
// Fields for Principle
JPanel row1 = new JPanel();
JLabel dollar = new JLabel("How much are you borrowing?");
JTextField money = new JTextField("", 15);
// Fields for Term and Rate
JPanel row2 = new JPanel();
JLabel choice = new JLabel("Select Year & Rate:");
JCheckBox altchoice = new JCheckBox("Alt. Method");
JTextField YR = new JTextField("", 4);
JTextField RT = new JTextField("", 4);
//Jcombobox R=rate,Y=year
String[] RY = {
"7 years at 5.35%", "15 years at 5.5 %", "30 years at 5.75%", " "
JComboBox mortgage = new JComboBox(RY);
// Fields for Payment
JPanel row3 = new JPanel();
JLabel payment = new JLabel("Your monthly payment will be:");
JTextField owe = new JTextField(" ", 15);
//Scroll Pane and Text Area
JPanel row4 = new JPanel();
JLabel amortization = new JLabel("Amortization:");
JTextArea chart = new JTextArea(" ", 7, 22);
JScrollPane scroll = new JScrollPane(chart, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
StringBuffer amt = new StringBuffer();
Container pane = getContentPane();
FlowLayout flow = new FlowLayout(FlowLayout.LEFT);
JButton Cal = new JButton("Calculate");
NumberFormat currency = NumberFormat.getCurrencyInstance();
public CalcTest()
// Title and Exit of JFrame
super("Mortgage and Amortization Calculator");
setSize(475, 328);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//JFrame layout
pane.setLayout(flow);
//Input output fields added to JFrame
row1.add(dollar);
row1.add(money);
pane.add(row1);
mortgage.setSelectedIndex(3);
mortgage.addActionListener(this);
mortgage.setActionCommand("mortgage");
row2.add(altchoice);
altchoice.addItemListener(this);
row2.add(choice);
YR.setEditable(false);
RT.setEditable(false);
row2.add(YR);
row2.add(RT);
row2.add(mortgage);
pane.add(row2);
row3.add(payment);
row3.add(owe);
pane.add(row3);
owe.setEditable(false);
//Scroll Pane added to JFrame
row4.add(amortization);
chart.setEditable(false);
row4.add(scroll);
pane.add(row4);
//Executable Button- Clear,Exit, Calculate
JPanel row5 = new JPanel();
JButton clear = new JButton("Clear");
clear.addActionListener(this);
row5.add(clear);
pane.add(row5);
JButton exit = new JButton("Exit");
exit.addActionListener(this);
row5.add(exit);
Cal.setEnabled(false);
Cal.addActionListener(this);
row5.add(Cal);
pane.add(row5);
setContentPane(pane);
setVisible(true);
} //End of constructor
private void calculate()
String loanAmount = money.getText();
if(loanAmount.equals(""))
return;
double P = Double.parseDouble(loanAmount);
int y;
double r;
if(altchoice.isSelected())
if(YR.getText().equals("") || RT.getText().equals(""))
return;
y = Integer.parseInt(YR.getText());
r = Double.parseDouble(RT.getText());
else
int index = mortgage.getSelectedIndex();
if(index == 3)
return;
int[] terms = { 7, 15, 30 };
double[] rates = { 5.5, 5.35, 5.75 };
y = terms[index];
r = rates[index];
double In = r / (100 * 12.0);
double M = P * (In / (1 - Math.pow(In + 1, -12.0 * y)));
owe.setText(currency.format(M));
//Column Titles for Text Area
chart.setText("Pmt#\tPrincipal\tInterest\tBalance\n");
for (int i = 0; i < y * 12; i++)
{ double interestAccrued = P * In;
double principalPaid = M - interestAccrued;
chart.append(i + 1 + "\t" + currency.format(principalPaid)
+ "\t" + currency.format(interestAccrued)
+ "\t" + currency.format(P) + "\n");
P = P + interestAccrued - M;
public void itemStateChanged(ItemEvent ie)
{ int status = ie.getStateChange();
if (status == ItemEvent.SELECTED)
mortgage.setEnabled(false);
YR.setEditable(true);
RT.setEditable(true);
Cal.setEnabled(true);
else
mortgage.setEnabled(true);
YR.setEditable(false);
RT.setEditable(false);
Cal.setEnabled(false);
public void actionPerformed(ActionEvent ae)//Calculations and Button executions
String command = ae.getActionCommand();
// Exit program
if (command.equals("Exit"))
System.exit(0);
// Cal button
if (command.equals("Calculate") || command.equals("mortgage"))
calculate();
// Clear fields
if (command.equals("Clear"))
money.setText(null);
mortgage.setSelectedIndex(3);
owe.setText(null);
chart.setText(null);
} //End actionPerformed
public static void main(String args[]) throws IOException
new CalcTest();
[/Code]Here is the code again
import java.io.;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.NumberFormat;
import java.math.*;
public class CalcTest extends JFrame implements ActionListener, ItemListener
public JMenuBar createMenuBar()
JMenuBar mnuBar = new JMenuBar();
setJMenuBar(mnuBar);
//Create File & add Exit
JMenu mnuFile = new JMenu("File", true);
mnuFile.setMnemonic(KeyEvent.VK_F);
mnuFile.setDisplayedMnemonicIndex(0);
mnuBar.add(mnuFile);
JMenuItem mnuFileExit = new JMenuItem("Exit");
mnuFileExit.setMnemonic(KeyEvent.VK_F);
mnuFileExit.setDisplayedMnemonicIndex(1);
mnuFile.add(mnuFileExit);
mnuFileExit.setActionCommand("Exit");
mnuFileExit.addActionListener(this);
JMenu mnuFunction = new JMenu("Function", true);
mnuFunction.setMnemonic(KeyEvent.VK_F);
mnuFunction.setDisplayedMnemonicIndex(0);
mnuBar.add(mnuFunction);
JMenuItem mnuFunctionClear = new JMenuItem("Clear");
mnuFunctionClear.setMnemonic(KeyEvent.VK_F);
mnuFunctionClear.setDisplayedMnemonicIndex(1);
mnuFunction.add(mnuFunctionClear);
mnuFunctionClear.setActionCommand("Clear");
mnuFunctionClear.addActionListener(this);
// Fields for Principle
JPanel row1 = new JPanel();
JLabel dollar = new JLabel("How much are you borrowing?");
JTextField money = new JTextField("", 15);
// Fields for Term and Rate
JPanel row2 = new JPanel();
JLabel choice = new JLabel("Select Year & Rate:");
JCheckBox altchoice = new JCheckBox("Alt. Method");
JTextField YR = new JTextField("", 4);
JTextField RT = new JTextField("", 4);
//Jcombobox R=rate,Y=year
String[] RY = {
"7 years at 5.35%", "15 years at 5.5 %", "30 years at 5.75%", " "
JComboBox mortgage = new JComboBox(RY);
// Fields for Payment
JPanel row3 = new JPanel();
JLabel payment = new JLabel("Your monthly payment will be:");
JTextField owe = new JTextField(" ", 15);
//Scroll Pane and Text Area
JPanel row4 = new JPanel();
JLabel amortization = new JLabel("Amortization:");
JTextArea chart = new JTextArea(" ", 7, 22);
JScrollPane scroll = new JScrollPane(chart, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
StringBuffer amt = new StringBuffer();
Container pane = getContentPane();
FlowLayout flow = new FlowLayout(FlowLayout.LEFT);
JButton Cal = new JButton("Calculate");
NumberFormat currency = NumberFormat.getCurrencyInstance();
public CalcTest()
// Title and Exit of JFrame
super("Mortgage and Amortization Calculator");
setSize(475, 328);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//JFrame layout
pane.setLayout(flow);
//Input output fields added to JFrame
row1.add(dollar);
row1.add(money);
pane.add(row1);
mortgage.setSelectedIndex(3);
mortgage.addActionListener(this);
mortgage.setActionCommand("mortgage");
row2.add(altchoice);
altchoice.addItemListener(this);
row2.add(choice);
YR.setEditable(false);
RT.setEditable(false);
row2.add(YR);
row2.add(RT);
row2.add(mortgage);
pane.add(row2);
row3.add(payment);
row3.add(owe);
pane.add(row3);
owe.setEditable(false);
//Scroll Pane added to JFrame
row4.add(amortization);
chart.setEditable(false);
row4.add(scroll);
pane.add(row4);
//Executable Button- Clear,Exit, Calculate
JPanel row5 = new JPanel();
JButton clear = new JButton("Clear");
clear.addActionListener(this);
row5.add(clear);
pane.add(row5);
JButton exit = new JButton("Exit");
exit.addActionListener(this);
row5.add(exit);
Cal.setEnabled(false);
Cal.addActionListener(this);
row5.add(Cal);
pane.add(row5);
setContentPane(pane);
setVisible(true);
} //End of constructor
private void calculate()
String loanAmount = money.getText();
if(loanAmount.equals(""))
return;
double P = Double.parseDouble(loanAmount);
int y;
double r;
if(altchoice.isSelected())
if(YR.getText().equals("") || RT.getText().equals(""))
return;
y = Integer.parseInt(YR.getText());
r = Double.parseDouble(RT.getText());
else
int index = mortgage.getSelectedIndex();
if(index == 3)
return;
int[] terms = { 7, 15, 30 };
double[] rates = { 5.5, 5.35, 5.75 };
y = terms[index];
r = rates[index];
double In = r / (100 * 12.0);
double M = P * (In / (1 - Math.pow(In + 1, -12.0 * y)));
owe.setText(currency.format(M));
//Column Titles for Text Area
chart.setText("Pmt#\tPrincipal\tInterest\tBalance\n");
for (int i = 0; i < y * 12; i++)
{ double interestAccrued = P * In;
double principalPaid = M - interestAccrued;
chart.append(i + 1 + "\t" + currency.format(principalPaid)
+ "\t" + currency.format(interestAccrued)
+ "\t" + currency.format(P) + "\n");
P = P + interestAccrued - M;
public void itemStateChanged(ItemEvent ie)
{ int status = ie.getStateChange();
if (status == ItemEvent.SELECTED)
mortgage.setEnabled(false);
YR.setEditable(true);
RT.setEditable(true);
Cal.setEnabled(true);
else
mortgage.setEnabled(true);
YR.setEditable(false);
RT.setEditable(false);
Cal.setEnabled(false);
public void actionPerformed(ActionEvent ae)//Calculations and Button executions
String command = ae.getActionCommand();
// Exit program
if (command.equals("Exit"))
System.exit(0);
// Cal button
if (command.equals("Calculate") || command.equals("mortgage"))
calculate();
// Clear fields
if (command.equals("Clear"))
money.setText(null);
mortgage.setSelectedIndex(3);
owe.setText(null);
chart.setText(null);
} //End actionPerformed
public static void main(String args[]) throws IOException
new CalcTest(); -
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BOILERPLATE TEXT:
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I'm really at my last rope, so hoping someone will have mercy and be able to help here.
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When I get this problem with an AppleTV 2 that can "see" my library, but when I try to open it, it says it couldn't find the library, it seems to have to do with a change in which Airport Extreme it's talking to.
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Adam -
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Documents say
Whenever the computer and the iOS device are on the same network, the iOS device will appear in iTunes, and you can sync it....
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Both are in the same network,
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I disconnect the wire,
and my iPad disappears from my iTunes screen.
in my iPad ->Settings -> General -> iTunes Wi-Fi Sync -> says " Sync will resume when (my PC) is available.
So, I can not sync via wi-fi
I appreciate if you can help me. -
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* Don't make any changes on the Safe mode start window.
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]] -
Can't print from safari to hp 4620 appears to print but does not first time i have attempted to print from safari , notes print fine no problems. It is like on a desktop my print is sitting in the queue there are error messages only the usual print dialogue. I've turned the printer off and back on with no luck any suggestions?
That's very strange. See if clearing the cache in Safari will make it work. I'll include the steps below. If that doesn't help, install a different browser, such as Opera, to see if that will print from pages that Safari won't. If it will, then something is wrong with Safari. If it doesn't print, then the web pages might have printing blocked. There are sites that are doing that for copyright reasons. Let me know what you find.
To clear the cache on Safari:
Open Settings.
Select Safari
Touch Clear Cache.
Select Clear.
Touch Clear Cookies.
Select Clear.
Touch Clear History.
Select Clear.
I am a printer tech for HP.
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