Datatek UMI - Manual (Page 46)

U N I V E R S A L M E D I A T I O N I N T E R F A C E ( U M I ) U S E R M A N U A L
04/30/09 46
The ping command issues a single ICMP echo request packet and awaits a response. The
response is printed, and another ICMP echo request is issued. The operation continues until the
user presses any character. The
[ Interval Seconds ] argument specifies the amount of time to
wait in seconds between the individual ICMP echo requests.
It should be noted that some host Internet Protocol implementations issue duplicate responses to
a single ICMP request. The
ping command will suppress duplicate replies.
5.29 TraceRoute
trte <IP address>
The trte command is only visible when the unit is logged in. The command has a single required
argument, the IP address that is to be pinged.
The trte command formats an ICMP echo request packet that is then sent to the IP Address
specified. The valid packet “time to live” is set to an initial value of “1”. If the IP address is on the
local subnet, the ICMP echo will respond immediately. If the IP address is on a different subnet,
the gateway router will decrement the “time to live” upon routing the packet. When the “time to
live” reaches zero, the gateway sends an ICMP “time exceeded” message to the
xxxx. The xxxx
then displays the gateway device, and increments the “time to live” on the next ICMP echo
request packet. This continues until the IP address is reached. The result is a display of all the
intermediary gateway devices used to reach the IP address from the
xxxx.
If no answer is received, each “time to live” value is tried 3 times before an increment. The
timeout is 5 seconds for each attempt. The maximum number of “time to live” is set to 30 in this
build of the
xxxx.
Since a traceroute command can be unusually long in duration, any character sent to the console
will interrupt the operation of the traceroute command.
5.30 Label
Syntax: label [ “Double Quoted String” | none ]
The label command is used to give the command console a unique prompt. The command is
visible only when logged into the UMI administrative console. If the label command is invoked
without arguments, the current configuration of the label is displayed. If the argument to the label
command is the word ‘none’, any current label is set to a null value. If the argument to the label
command is a double quoted string, the contents of the string becomes the application console