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To determine the available show commands for the system or a specific level of the CLI, enter the
following command.
device#show ?
Syntax: show option
You also can enter "show" at the command prompt, then press the TAB key.
Enabling the display of the elapsed timestamp for port statistics reset
Whenever the port statistics of a device are cleared globally or on an interface, the counter values of the
received and transmitted packets on the device are reset for all the ports or for an interface,
respectively.
The elapsed time after the most recent reset of the port statistics counters can be displayed in the
output of the
show statistics command by configuring the port-statistics-reset-timestamp enable
command. By default, the display of the elapsed timestamp information is disabled.
The elapsed time is calculated as the time between the most recent reset of the port statistics counters
and the time when the
show statistics command is executed.
The following list provides details of the conditions under which the port statistics counters are reset and
also explains the elapsed time calculation considerations.
• When the port statistics are cleared individually using the clear statistics ethernet command. The
elapsed time is calculated and displayed only for that particular interface.
• When the port statistics are cleared globally using the clear statistics command. The port statistics
counters for all the ports, including management ports, are cleared and the elapsed time is calculated
and displayed for each of the interfaces.
• When the management interface is cleared using the clear statistics management command. The
port statistics counters specific to management ports are cleared. The elapsed time is calculated and
displayed for the management interface.
• If the system is reloaded (hard reboot or soft reboot), the port statistics on the device are cleared
automatically. In this case, the time when the ports are cleared during the reload is considered as the
most recent reset time.
• In a stacking device, the Elapsed Timestamp information is applicable for other unit's ports. In case
of a switchover, all the port statistics are cleared and the elapsed time is calculated and displayed for
all ports.
• If hitless failover is enabled and if any unit is reloaded, the statistics of the reloading device's
interfaces are cleared. In this case, the time when the ports are cleared during the reload is
considered as the most recent reset time.
• The elapsed time is not impacted when the Network Time Protocol (NTP) syncs up with a different
time other than the recorded time.
Viewing port statistics
Port statistics are polled by default every 10 seconds.
You can view statistics for ports by entering the following show commands:
• show interfaces
• show configuration
• show statistics
The Elapsed Timestamp information is displayed in the output of the following show commands:
Enabling the display of the elapsed timestamp for port statistics reset
FastIron Ethernet Switch Administration Guide 231
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