Contents
 Network Statistics

Use Network Statistics to retrieve and display network and system statistics.

Introduction

What Network Statistics Can Tell You

How To...

View Network Statistics

Copy Statistics to the Windows Clipboard

Store Statistics in a File

Time-Stamp Statistics

Continually Collect Statistics

Change the Refresh Interval

Create an Archive File

Troubleshoot Problems With Network Statistics


What Network Statistics Can Tell You

Network Statistics gathers and displays network and system operating status and statistics. Once you've gathered information, you can view it, save it in a file, or store it in the Windows clipboard for later use. Network Statistics returns information similar to the UNIX netstat command. Use this information to analyze, assess, and map data transfer to and from your PC.

The Network Statistics dialog includes controls that allow you to time-stamp information, and to activate an Auto-Refresh feature. When you activate Auto-Refresh, Network Statistics runs continuously, updating information at the interval you specify.

Network Statistics provides a variety of status and statistical information. The information you see depends on the information type you select. The set of controls and check boxes available in the Network Statistics dialog box changes according to the type of information you choose.

More About the Types of Statistics You Can View


Viewing Network Statistics

1.	Double-click the Network Statistics icon.

The Network Statistics application starts and the Network Statistics dialog box opens.

2.	Using the option buttons, select the type of information you want to view.

Depending on the information type you select, additional check boxes and controls may appear in the dialog box. Refine your selection using these additional controls.

3.	Choose Display.

The information you've requested is displayed in the report area of the Network Statistics dialog box.


Copying Statistics to the Windows Clipboard

1.	Double-click the Network Statistics icon.

The Network Statistics application starts and the Network Statistics dialog box opens.

2.	Using the option buttons, select the type of information you want to view.

Depending on the information type you select, additional check boxes and controls may appear in the dialog box. Refine your selection using these additional controls.

3.	Choose Display.

The information you've requested is displayed in the report area of the Network Statistics dialog box.

4.	Choose Copy to Clipboard.

A copy of the information in the report area is placed in the Windows clipboard and can be pasted into a report or other document.


Storing Information in a File
Storing Statistics in a File

1.	Double-click the Network Statistics icon.

The Network Statistics application starts and the Network Statistics dialog box opens.

2.	Using the option buttons, select the type of information you want to view.

Depending on the information type you select, additional check boxes and controls may appear in the dialog box. Refine your selection using these additional controls.

3.	Enable the Output to File check box function.

An "X" appears in the Output to File check box.

4.	Choose Output File.

The Specify Output File Name dialog box opens.

5.	Accept the default file name or enter a path and file name for the statistics file and choose OK.

Statistics will be saved in a file with the path and name specified.

6.	(Optional) Activate the Auto-Refresh function to continuously record statistics.

Updated statistics will be appended of the statistics file at the interval specified.

7.	Choose Display.

The Network Statistics application begins collecting the statistics you're requested, periodically updates and displays the statistics in the report area of the Network Statistics dialog, and appends updated statistics to the end of the statistics file.

See Also:

Activate Auto-Refresh


Time Stamping Information
Time Stamping Statistics

1.	Double-click the Network Statistics icon.

The Network Statistics application starts and the Network Statistics dialog box opens.

2.	Using the option buttons, select the type of information you want to view.

Depending on the information type you select, additional check boxes and controls may appear in the dialog box. Refine your selection using these additional controls.

3.	Select the Time Stamp Output check box.

An X appears in the check box indicating this feature is enabled.

4.	Choose Display.

The information you've requested is displayed in the report area of the Network Statistics dialog box along with the date and time the sample was taken.


Activating Auto-Refresh

1.	Double-click the Network Statistics icon .

The Network Statistics application starts and the Network Statistics dialog box opens.

2.	Using the option buttons, select the type of information you want to view.

Depending on the information type you select, additional check boxes and controls may appear in the dialog box. Refine your selection using these additional controls.

3.	Select the Auto-Refresh check box.

An X appears in the check box indicating this feature is enabled.

4. Specify a refresh interval between 1 and 60 seconds.

Statistics will be updated at the interval specified.

5.	Choose Display.

The information you've requested is displayed in the report area of the Network Statistics  box, and the Display button label changes to Stop. Information is refreshed at the interval indicated in the interval edit check box.

5.	Choose Stop to stop updating information and halt the Auto-Refresh function.

See Also:

Changing the Refresh Interval


Changing the Refresh Interval

1.	Double-click the Network Statistics icon .

The Network Statistics application starts and the Network Statistics dialog box opens.

2.	Using the option buttons, select the type of information you want to view.

Depending on the information type you select, additional check boxes and controls may appear in the dialog box. Refine your selection using these additional controls.

3.	Choose the Auto-Refresh check box.

An X appears in the check box indicating this feature is enabled.

4.	Enter a refresh interval in seconds in the interval edit box.

Values between 1 and 60 are allowed.

5.	Choose Display.

The information you've requested is displayed in the report area of the Network Statistics dialog box, and the Display button label changes to Stop. Displayed information is refreshed at the interval you've specified.

6.	Click Stop to stop updating information and halt the Auto-Refresh function.


Creating an Information Archive File
Creating an Archive File

1.	Double-click the Network Statistics icon .

The Network Statistics application starts and the Network Statistics dialog box opens.

2.	Using the option buttons, select the type of information you want to view.

Depending on the information type you select, additional check boxes and controls may appear in the dialog box. Refine your selection using these additional controls.

3.	Choose the Auto-Refresh check box.

An X appears in the check box indicating this feature is enabled.

4.	Choose Output to File.

The Output to File dialog box opens.

5.	Enter a file path and name and choose OK.

The Output to File dialog box closes.

6.	Choose Display.

The information you've requested is displayed in the report area and the Display button label changes to Stop. Displayed information is refreshed at the interval indicated in the interval edit box. As each refresh occurs, new information is appended to the statistics file.

7.	Click Stop to stop updating information and halt the Auto-Refresh function.


More About the Types of Information You Can View

Network Statistics returns detailed information about the categories listed below. Click on an item to learn more about the statistics available and their significance.

ARP

Interface

Memory

Protocols

Routing

Sockets


ARP

This information type displays the Internet-to-Ethernet address translation information used by the address resolution protocol (ARP). This information allows you to correlate a device's IP address with its Ethernet address.

You can view the complete address resolution table or the table entry for a specific host. Table entries are dynamic, changing over time. View host-specific information by entering the host name or the host IP address.

Use the Network Statistics utility to make ARP queries.


Interfaces

Use the information available here to track errors associated with a particular local PC interface. There are four interface types:

PPP - Point-to-Point Protocol

Loopback

NDIS

Packet

Reported statistics for these interfaces include:

Name - Interface name

MTU - Maximum Transmission Unit = Largest data packet allowed by interface

Network - Name of the network associated with this interface

Address - Ethernet address assigned to this interface

Ipkts - Incoming packets received through this interface

Ierrs - Incoming errors received through this interface

Opkts - Outgoing packets sent through this interface

Oerrs - Outgoing errors sent through this interface

Coll - Collisions detected by this interface


Memory Usage

Use this function to gather information on the state of memory buffers allocated to the virtual device driver.

Memory reports the following statistics:

mbufs in use - A TCP/IP stack parameter

Mapped pages in use - A TCP/IP stack parameter

The following additional memory-allocation information is also provided:

Requests for memory denied - Unsuccessful memory allocation requests

Requests for memory delayed - Allocation request that encountered a delay in service

Calls to protocol drain routines - Requests that occurred when memory was fully allocated and that resulted in requests to each protocol to release some memory


Protocols

The information available here enables you to analyze performance statistics on a protocol-by-protocol basis when investigating problems related to a specific protocol.

Protocols for which statistics are available include:

TCP - To resolve connection-oriented problems

UDP - To resolve datagram-oriented problems

IP - To resolve low-level problems related to routing, fragmentation, etc.

ICMP - To resolve low-level problems related to Internet connectivity (PING, router redirects, etc.)

IGMP - To resolve multicast-related problems


Routing

Use this information to view the route packets take from your PC to their initial hop or, in single-hop routes, to their destination. You can also view local routing between hosts on your network.

The Routing Table information presented includes:

Destination - Initial hop or destination of route

Gateway - Name of gateway used on the route

Flags - D=dynamically assigned route; G=gateway; H=host; U=up (status of active route); M=modified route

Refs - Number of references to route held by other network tasks

Use - Number of packets forwarded to this route

Interface - Interface through which packets pass on this route


Sockets

Use this information to examine the state of sockets and to determine if specific services are using specific ports. Information is available about:

PCB - Protocol control block assigned to the socket

Prot - Protocol being used

RcvQ - Bytes waiting to be received

SendQ - Bytes waiting to be sent

Local Address - Address and port of local host of a connection. (An asterisk indicates item is not bound to a specific address)

Foreign Address - Address and port of remote host of a connection. (An asterisk indicates item is not bound to a specific address)

State - State of the connection


Troubleshooting Network Problems
Troubleshooting Problems With Network Statistics

Here are some common problems you can have with the Network Statistics utility:

Problem	Possible Causes	Solution
Nothing in the view window to copy.	You selected Copy to Clipboard, but the view window is empty.	Use the option buttons to display the type of information you want to view, choose Display, then choose Copy to Clipboard again.
Another application is using the clipboard.	Another application is writing to the clipboard.  Only one application can write to the clipboard at a time.	Wait a minute and try it again. Close other Windows applications and try it again.
Error writing output file.	You tried to save network statistics in a read-only file.	Make sure the file is not read-only and try again, or select another file.