Configuring 2-event Classification

Restrictions for 2-Event Classification

The following restrictions apply to 2-event classification:

  • Configuration of 2-event classification has to be done before physically connecting any endpoint. Alternatively, do a manual shut and unshut of the ports drawing power.

  • Power to the ports is interrupted in case of microcontroller unit firmware upgrade and ports will be back up immediately after the upgrade.

Information about 2-event Classification

When a class 4 device gets detected, IOS allocates 30W without any CDP or LLDP negotiation. This means that even before the link comes up the class 4 power device gets 30W.

Also, on the hardware level the PSE does a 2-event classification which allows a class 4 PD to detect PSE capability of providing 30W from hardware, register itself and it can move up to PoE+ level without waiting for any CDP/LLDP packet exchange.

Once 2-event is enabled on a port, you need to manually shut/un-shut the port or connect the PD again to start the IEEE detection again. Power budget allocation for a class-4 device will be 30W if 2-event classification is enabled on the port, else it will be 15.4W.

Configuring 2-Event Classification

To configure a device for a 2-event classification, perform the steps given below.

Procedure

  Command or Action Purpose

Step 1

enable

Example:


Device> enable

Enables privileged EXEC mode.

Enter your password, if prompted.

Step 2

configure terminal

Example:


Device# configure terminal

Enters global configuration mode.

Step 3

interface interface-id

Example:


Device(config)# interface gigabitethernet2/0/1

Specifies the physical port to be configured, and enters interface configuration mode.

Step 4

power inline port 2-event

Example:


Device(config-if)# power inline port 2-event

Configures 2-event classification on the device.

Step 5

end

Example:


Device(config-if)# end

Returns to privileged EXEC mode.

Example: Configuring 2-Event Classification

This example shows how you can configure 2-event classification:

Device> enable
Device# configure terminal
Device(config)# interface gigabitethernet2/0/1 
Device(config-if)# power inline port 2-event
Device(config-if)# end

Feature History for 2-Event Classification

This table provides release and related information for the features explained in this module.

These features are available in all the releases subsequent to the one they were introduced in, unless noted otherwise.

Release

Feature

Feature Information

Cisco IOS XE Fuji 16.9.2

2-Event Classification

When a class-4 device gets detected, Cisco IOS allocates 30W without any CDP or LLDP negotiation. This means that even before the link comes up, the class-4 power device gets 30W.

Cisco IOS XE Cupertino 17.9.1

2-Event Classification

This feature was implemented on C9200CX-12P-2X2G, C9200CX-8P-2X2G, and C9200CX-12T-2X2G models of the Cisco Catalyst 9200CX Series Switches, which were introduced in this release.

Use the Cisco Feature Navigator to find information about platform and software image support. To access Cisco Feature Navigator, go to Cisco Feature Navigator.