Reference Guide

● Port {id |all} queue ucast {id | all} - egress queue-level snapshot for unicast
packets only
● Port {id |all} queue mcast {id | all} - egress queue-level snapshot for multicast
packets only
● Port {id |all} prio-group {id | all} - ingress priority-group level snapshot
history Y Historical snapshot details of buffer space statistics, where Y can be one of the
following:
● Instance {all | id} - Displays the information for all instances or the specified
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 Z9500.
Usage
Information
When you enter the “instance all” option, “show hardware linecard 0 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 linecard 0 buffer-stats-snapshot unit 0
resource X” for specified instance alone is displayed.
When you enter the “summary” option, “show hardware linecard 0 buffer-stats-snapshot unit 0 resource
X” will be enhanced to display the total buffered cells, shared cells, headroom cells for last 5 instances in
the table format.
If information for specified 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 configured 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 fifth instance after 30 seconds of
enabling polling, the aforementioned information message is shown.
If specified instance ID is higher than the size of the maximum number of snapshot instances configured,
the following error message is displayed on the console:
%Error: Instance Id is not valid. Configured max snapshot instances are
<max-instances>
If you configured the maximum number of instances as 5 and attempt to view the buffer statistics
tracking details for the instance ID of 6, the aforementioned error is shown.
Example
Dell#show hardware linecard 0 buffer-stats-snapshot unit 0 resource port 5 queue all history summary
linecard 0 unit 0 port 5 (interface te 0/4)
---------------------------------------------------------------------------------------------------------------
Q# TYPE Q# TOTAL BUFFERED CELLS
Instance 1 Instance 2 Instance 3 Instance 4 Instance 5
10S 20S 30S 40S 50S
---------------------------------------------------------------------------------------------------------------
UCAST 2 5 4 6 0 1
UCAST 3 2 0 1 5 0
UCAST 11 0 3 2 0 3
MCAST 4 0 0 0 0 3
Data Center Bridging (DCB) 473