rlCdpTlvPowerAvailableRequestId 1.3.6.1.4.1.9.6.1.101.137.16.1.20

The Power Available TLV Request-ID field echoes the Request-ID field last received in a Power Requested TLV. It is 0 if no Power Requested TLV has been received since the interface last transitioned to ifOperState == Up.