Service Manual

history Y Historical snapshot details of buer space statistics, where Y can be one of the
following:
• Instance {all | id} - Displays the information for all instances or the specied
instance of the snapshot.
• Summary - Displays the consolidated information pertaining to the preceding
three instances of the snapshot values collected in history.
Command Modes
EXEC
EXEC Privilege
Command History
Version Description
9.7(0.0) Introduced on the S6000-ON.
9.3(0.0) Introduced on the S6000 platform.
Usage Information
When you enter the instance alloption, show hardware stack-unit stack-unit-number
buffer-stats-snapshot unit 0 resource X output for all available instances on the history
collection is displayed.
When you enter the instance id option, show hardware stack-unit stack-unit-number
buffer-stats-snapshot unit 0 resource X for specied instance alone is displayed.
When you enter the summaryoption, show hardware stack-unit stack-unit-number
buffer-stats-snapshot unit 0 resource X will be enhanced to display the total buered cells,
shared cells, headroom cells for last 5 instances in the table format.
If information for specied instance id is not available when you enter the show command, which occurs if
you issue the command before the time elapsed for the snapshot to be captured for that instance ID, the
following informational message is displayed on the console:%Info: Data for instance id id is
not available.
If information for specied instance id id is not available when you enter the show command, which occurs if
you issue the command before the time elapsed for the snapshot to be captured for that instance ID, the
following informational message is displayed on the console:%Info: Data for instance id id is
not available.
For example, if you congured 5 as the maximum instances with linear periodicity and a polling interval of 10
seconds, 1 as the multiplier, then 5 instances will be polled at 10, 20, 30, 40, and 50 seconds incrementally. If
you attempt to enter the show command to display the fth instance after 30 seconds of enabling polling,
the aforementioned information message is shown.
If specied instance ID is higher than the size of the maximum number of snapshot instances congured,
the following error message is displayed on the console:%Error: Instance Id is not valid.
Configured max snapshot instances are <max-instances>
If you congured the maximum number of instances as 5 and attempt to view the buer statistics tracking
details for the instance ID of 6, the aforementioned error is shown.
Example
Dell#show hardware stack-unit 1 buffer-stats-snapshot unit 0 resource port 5 queue all history summary
Data Center Bridging (DCB)
433