show dcb cn priority

Use this command to display the configuration and status of congestion notification priority values on the switch.

Syntax

show dcb cn priority [priority] [-interesting]

Parameters

priority (Optional) Specifies the congestion notification priority value to display.
-interesting (Optional) Specifies that only port-priority objects with a non-default defense mode will be displayed for the specified priority.

Defaults

If no option is specified, information for all congestion notification priority values is displayed.

Mode

All command modes.

Examples

This example displays configuration and status of all congestion notification priority values on the switch:

System(rw)->show dcb cn priority
* Alt – Admin Alternate Priority
* Aut – Auto Alternate Priority
Pri  Choice  Alt  Aut  Admin Defense  Creation     LLDP      Status
---  ------  ---  ---  -------------  -----------  --------  --------
 3   Auto     0    2   Interior       AutoEnable   Enabled   Inactive
 4   Admin    2    3   Edge           AutoEnable   Enabled   Active
 5   Auto     0    3   Interior       AutoDisable  Disabled  Active

This example displays configuration and status information for congestion notification priority value 4:

System(rw)->show dcb cn priority 4
CNPV 4 Information
----------------------------------------
Defense Mode Choice      : Admin
Admin Alternate Priority : 2
Auto Alternate Priority  : 3
Admin Defense Mode       : Edge
Creation                 : AutoEnable
LLDP Choice              : Enabled
LLDP Instance Selector   : 1
Row Status               : active

show dcb cn priority Output Details provides an explanation of the command output.

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show dcb cn priority Output Details

Output... What it displays...
Pri Specifies a configured CNPV.
Choice Specifies the default choice mode being used for the priority row. Valid values are Auto or Admin. If the default mode choice is Admin, the admin configured alternate priority and admin defense mode are used by the port-priority entries by default. If the default mode choice is Auto, the auto alternate priority is used and the defense mode is selected by the port.
Alt The admin alternate priority value for this CNPV.
Aut The auto alternate priority value for this CNPV.
Admin Defense The defense mode used to protect the CNPV queue from receiving non-congestion controlled flows and determines if a CN-TAG should be removed or not. Congestion Notification defense can use LLDP to dynamically control the states. These states are defined per priority and per port:
  • Disabled – The congestion notification capability is administratively disabled for this priority value and port. This priority is not a CNPV. The priority regeneration table controls the remapping of input frames on this port for this priority. CN-TAGs are neither added by an end station nor removed by a bridge.
  • Edge – On this port and for this CNPV, the input frame priority parameters are remapped to an alternate (non-CNPV) value, regardless of the priority regeneration table settings. CN-TAGs are not added by an end station, and are removed from frames before being output by a bridge. This mode is optional for an end station.
  • Interior – On this port and for this CNPV, the input frame priority parameters are not remapped, regardless of the priority regeneration table settings. CN-TAGs are not added by an end station, and are removed from frames before being output by a bridge. This is a transition state due to the fact that the port is not yet aware of the congestion notification status of its neighbor.
  • InteriorReady - On this port and for this CNPV, the input frame priority parameters are not remapped, regardless of the priority regeneration table settings. CN-TAGs can be added by an end station, and are not removed from frames being output by a bridge. This port has successfully negotiated congestion notification with its neighbor.
Creation Specifies the default value for priority defense mode choice for a newly created port-priority table entry. If set to AutoEnable, the congestion notification domain defense and alternate priority are both controlled by the values in the port-priority table. If set to AutoDisable, the congestion notification domain defense and alternate priority are controlled by administrative values in the same table entry as this object.
LLDP Specifies whether LLDP instance selection is enabled or disabled.
Status Specifies whether this priority is currently active.