show ports stack-ports congestion

show ports stack-ports stack_port_list congestion {no-refresh | refresh} port-number


Displays the stacking port congestion statistics (dropped packets) for the specified ports on the front panel.

Syntax Description

stack_port_list Specifies one or more stacking ports.
no-refresh Specifies a static snapshot of data instead of the default dynamic display.
refresh Specifies a continuous refresh of output.
port-number Displays port number instead of display string in the output of the command.


Displays the port congestion statistics for all ports in real-time.

Usage Guidelines

The bottom line in the real-time display shows keys that you can press to change the display. For example, you can clear the counters or page up or down through the list of ports.



If you are displaying congestion statistics in real time and another CLI session resets the counters for a port you are monitoring, the counters displayed in your session for that port are also reset.

If you specify the no-refresh parameter, the system displays a snapshot of the data at the time you issue the command.



Packets can be dropped at multiple locations along the path through the hardware. The per-port congestion counters count all dropped packets for all ports.

If you do not specify a port number or range in the command, dropped packet counts are displayed for all ports.



To display the congestion statistics for the QoS profiles on a stack port, use the show ports stack-ports stack_port_list qosmonitor congestion {no-refresh | refresh} {port-number} command.


The following example shows the packets dropped due to congestion for all ports in real time:
# show ports stack-ports congestion
Port Congestion Monitor                                 Fri Apr 21 13:02:37 2017
Port      Link      Packet
          State     Drop
1:1       R         0
1:2       R         0
1:3       A         96
1:4       R         0
2:1       R         0
2:2       A         28513
2:3       R         0
2:4       R         0
2:5       R         0
2:6       R         0
2:7       R         0
2:8       R         0
3:1       R         0
3:2       R         0
3:3       R         0
3:4       R         0
> indicates Port Display Name truncated past 8 characters
Link State: A-Active, R-Ready, NP-Port Not Present, L-Loopback
0->clear counters  U->page up  D->page down ESC->exit


This command was first available in ExtremeXOS 22.3.

Platform Availability

This command is available on ExtremeSwitching 5320, 5420, 5520, and 5720 series switches.