show dcb cn congestion-point

Use this command to display the configuration and status of congestion notification congestion points.

Syntax

show dcb cn congestion-point [port-string [cp-id]] [stats [-interesting]]

Parameters

port-string (Optional) Specifies a congestion point port to display. For a detailed description of possible port-string values, refer to Port String Syntax Used in the CLI in the S-, K-, and 7100 Series Configuration Guide.
cp-id (Optional) Specifies a congestion point ID to display.
stats (Optional) Displays congestion point statistics.
-interesting (Optional) Displays only statistics of ports that transmitted congestion notification messages.

Defaults

If no options are specified, a summary line for all the congestion points on the bridge are displayed.

Mode

All command modes.

Examples

This example displays congestion point information for all ports:

System(rw)->show dcb cn congestion-point tg.1.1-3
                        Queue               Minimum     Minimum
            CP          Size                Sample      Header
Port Name   Index  Pri  Set Point   Weight  Base        Octets
----------  -----  ---  ----------  ------  ----------  -------
tg.1.1        5     4   26000       1       150000      0
tg.1.2        5     4   26000       1       150000      0
tg.1.3        5     4   26000       1       150000      0
...

This example displays congestion point information for congestion point index 7 on port tg.1.1:

System(rw)->show dcb cn congestion-point tg.1.1 7
Congestion Point
---------------------------------------------------
Port                : tg.1.1
CP Index            : 7
Lowest CNPV         : 6
MAC Address         : 00-11-88-FE-79-6A
CP Identifier       : 00-11-88-FE-79-00-01-00
Q Size Set Point    : 26000
Feedback Weight     : 1
Min Sample Base     : 150000
Min Header Bytes    : 0
Discarded Frames    : 0
Transmitted Frames  : 0
Transmitted CCMs    : 0
Queue Profile Type  : 1
Queue Profile Index : 0

This example displays congestion point stats for all congestion points:

System(rw)->show dcb cn congestion-point stats
           CP   Tx                    Discarded             Tx
Port       Idx  Frames Count          Frames Count          CNMs Count
---------  ---  --------------------  --------------------  -------------------
tg.1.1      7   0                     0                     0
tg.1.2      7   0                     0                     0
tg.1.3      7   0                     0                     0
...

show dcb cn congestion-point Output Details provides an explanation of the command output.

Click to expand in new window

show dcb cn congestion-point Output Details

Output... What it displays...
Port or Port Name A port configured for congestion notification.
CP Index The congestion point table index value for a congestion point on the bridge or end station device.
Pri or Lowest CNPV The lowest numerical congestion notification priority value this congestion point table entry serves.
MAC Address The MAC address of the system transmitting the congestion notification message (CNM) PDU and used as the CNM PDU source address.
CP Identifier The Congestion Point Identifier (CPID) that uniquely identifies this congestion point in a virtual bridge network, carried in CNM PDUs sent by this congestion point.
Q Set-point or Queue Size Set Point The set point for the queue managed by this congestion point is a target value for the number of octets in the congestion point queue. CNM PDUs are transmitted to the sources of frames queued in this congestion point's queue in order to keep the total number of octets stored in the queue at this set point.
Weight (W) or Feedback Weight W is the weight to be given to the change in queue length in the calculation of quantitized feedback as defined in the IEEE 802.1Q-2011 standard. Weight is an integer value from which W is derived (equal to two to the power of the weight value specified here). Thus, if weight equals a -1, W = 1/2. This value is platform dependent and can be between the minimum weight and maximum weight as displayed by show dcb cn q-profile. The default value is 2.
Min or Minimum Sample Base The minimum number of octets to enqueue in the congestion point queue between transmissions of CNM PDUs. Default value is 150000.
Minimum Header Octets or Min Header Bytes The minimum number of octets to be returned in the encapsulated MSDU field of each CNM PDU generated.
Tx-Frames The number of data frames passed on to the queue controlled by a congestion point that were not discarded.
Discarded Frames The number of frames discarded because of a full output queue.
Transmitted Frames The number of transmitted frames by this congestion point.
Transmitted CNMs The number of CNM PDUs enqueued on this congestion point‘s transmit queue.
Queue Profile Type The transmit queue type.
Queue Profile Index The transmit queue index.