to check your current Flash memory. IOS 15.x images are larger than older 12.x versions and may require more space than your device has available. 2. Get the official file

# 1. Copy image to flash (via TFTP) copy tftp://192.168.1.100/c3560ipservicesk9-mz.150-2.SE11.bin flash:

show version | include IOS

The fans whirred to a high-pitched scream, then settled into a steady hum. As the console text scrolled by, Alex saw the magic words: Cisco IOS Software, C3560 Software (C3560-IPSERVICESK9-M), Version 15.0(2)SE11

: Access typically requires a valid service contract (such as SMARTnet) and a registered Cisco.com login.