Hulc LED Process - Is responsible for link status detection.
Hulc LED Process uses 15-30% CPU on Catalyst 3560X/3750X platforms.
The is seen in 12.2(53)SE releases or later.
This is an expected behavior and there is no workaround.
Further Problem Description:
The "Hulc LED" process does following tasks:
- Check Link status on every port - If the switch supports POE, it checks to see if there is a Power Device (PD) detected - Check the status of the transceiver - Update Fan status - Set Main LED and ports LEDs - Update both Power Supplies and RPS - Check on system temperature status