In the default configuration,PoE support is enabled on the ports in a PoE module installed on the switch. The default priority for all ports is low and the default power notification threshold is 80%.
For a given level, ports are prioritized by port number in ascending order. For example, if ports A1 to A24 have a priority level of critical, port A1 has priority over ports A2 to A24.
If there is not enough power available to provision all active PoE ports at a given priority level, the lowest-numbered port at that level is provisioned first. For chassis switches, the lowest-numbered port at that level starting with module A, then B, C, and so on is provisioned. PoE priorities are invoked only when all active PoE ports cannot be provisioned (supplied with PoE power.)
In chassis switches, you can use one command to set the same priority level on PoE ports in multiple modules. For example, to configure the priority to High for ports c5 to c10, C23 to C24, D1 to D10, and D12, you could use this command:
Example
Suppose that you configure the PoE priority for a module in slot C as shown in PoE priority operation on a PoE module .
PoE priority operation on a PoE module
Port | Priority setting | Configuration command and resulting operation with PDs connected to ports C3 through C24 |
---|---|---|
C3 - C17 | Critical |
In this example, the following CLI command sets ports C3 to C17 to Critical: (HP_Switch_name#) interface c3-c17 power-over-ethernet critical The critical priority class always receives power. If there is not enough power to provision PDs on all ports configured for this class, no power goes to ports configured for high and low priority. If there is enough power to provision PDs on only some of the critical-priority ports, power is allocated to these ports in ascending order, beginning with the lowest-numbered port in the class, which, in this case, is port 3. |
C18 - C21 | high |
In this example, the following CLI command sets ports C19 to C22 to high: (HP_Switch_name#) interface c19-c22 power-over-ethernet high The high priority class receives power only if all PDs on ports with a critical priority setting are receiving power. If there is not enough power to provision PDs on all ports with a high priority, no power goes to ports with a low priority. If there is enough power to provision PDs on only some of the high-priority ports, power is allocated to these ports in ascending order, beginning, in this example, with port 18, until all available power is in use. |
C22 - C24 | low |
In this example, the CLI command sets ports C23 to C24 to low[a]: (HP_Switch_name#) interface c23-c24 power-over-ethernet low This priority class receives power only if all PDs on ports with high and critical priority settings are receiving power. If there is enough power to provision PDs on only some low- priority ports, power is allocated to the ports in ascending order, beginning with the lowest-numbered port in the class (port 22, in this case), until all available power is in use. |
C1 - C2 | N/A |
In this example, the CLI command disables PoE power on ports C1 to C2: (HP_Switch_name#) no interface c1-c2 power-over-ethernet There is no priority setting for the ports in this example. |
[a] In the default PoE configuration, the ports are already set to low priority. In this case, the command is not necessary. |