Ping test verifies the overall downstream/upstream communication route
and connectivity of a DSAM within the cable system. The ping test allows
you to select the IP address, packet size, and time between pings and
displays ping test result data that includes; round trip time, time-to-live
(TTL), packets sent and lost, average round trip time, and loss to sent
ratio. To perform the Ping test, press the VIEW softkey, use the
arrow keys to select Ping, and press ENTER.
Parameter Selections
The parameter selection portion of the screen provides the following selections:
- IP address (For a list of the 10 IP addresses available, select the IP
address arrow.)
- predefined packet size values of 64, 128, 256, 512, 1024, or 1518 (in
bytes) are available (The default value is 64 bytes and for a list of
the predefined packet size values, select the Packet Size (bytes)
arrow.)
- predefined time between pings values of 0, 10 ms, 25 ms, 50 ms, 100 ms,
1 sec, 2 sec, or 5 sec. (The default value is 1 second and for a list
of the predefined time between pings, select the Time Between Pings
arrow.)
Measurement Data
The PING TEST display contains DOCSIS PING measurement data. The ping data
is captured and continuously updated during the DOCSIS Ping test process.
NOTE: Since the ping test can only be used after the meter has
successfully ranged and registered with the CMTS, the ping test is not
available if Ranging Only is set in the DOCSIS configuration session or
if registration with the CMTS failed.
REPLY
The reply portion of the screen displays the round trip time and the time
to live for each ping. Once a ping test is started six results are displayed.
The results continuously scroll upward and the most recent ping result
is located on the bottom.
STATISTICS
The statistics portion of the screen is continuously updated and displays
the packets sent and lost, average round trip time, and loss to sent ratio.
Softkeys
START/STOP
A single softkey performs both start and stop. The label changes to "Stop"
while the test is running and back to "Start" when it is stopped.
Select the START to start a ping test. The Reply and Statistics
areas are initialized with default values (blank or 0's) and then the
areas are updated continuously with each ping.
Select the STOP to stop a ping test. The Reply and Statistics areas
will display the most recent results.
VIEW
The view menu allows you to directly display the Range, Registration, or
Throughput, or Ping screens. To select a different screen, press the VIEW
softkey, use the arrow keys to select desired mode, press ENTER.
SETTINGS
Restore Defaults
The Settings menu item RESTORE DEFAULTS allows you to restore default values
for the packet size and the time between pings.
To perform the Restore Defaults
1) Press the SETTINGS softkey, use the arrow keys to select Restore
Defaults.
2) Press ENTER.
NOTE: The ten stored IP Addresses are not affected by the Restore Defaults
menu item.
Add IP
To add an IP address
1) Use the arrow keys to select the IP Address field.
2) Press ENTER.
3) Using the arrow keys select an IP Address.
4) Press ENTER.
5) Press the SETTINGS softkey, using the arrow keys select Add
IP....
An Add IP dialog box is displayed.
6) Add the IP address, and press ENTER.
NOTE: The last added IP address is placed on the top of the selection
list.
Modify IP
To modify an IP
1) Use the arrow keys to select the IP Address field.
2) Press ENTER.
3) Using the arrow keys select an IP Address.
4) Press ENTER.
5) Press the SETTINGS softkey, using the arrow keys select Modify
IP....
A Modify IP dialog box will display the selected IP Address from the IP
Address field.
6) Edit the IP address, and press ENTER.
NOTE: The last edited IP address is placed on the top of the selection
list.
Delete IP
To delete an IP
1) Use the arrow keys to select the IP Address field.
2) Press ENTER.
3) Using the arrow keys select an IP Address.
4) Press ENTER.
5) Press the SETTINGS softkey, using the arrow keys select Delete
IP....
A delete IP dialog box will display the selected IP Address from the IP
Address field.
6) To delete the IP address, press ENTER.