(This guide covers the detailed configuration of all devices from the access layer, aggregation layer to core layer involved in my other resource "CiscoIBA LAN Design Guide", which is very suitable for after-sales engineers responsible for the specific implementation of the project as a configuration reference~ This guide The guide is intended for readers with some or all of the following attributes: ● Has 2,000-10,000 networked employees ● Has 1 or more local area networks supporting up to 5,000 access users ● Provides wired and wireless network access for employees ● Provides wireless guests Access ●Wired and wireless voice access solutions ●IT staff with CCNA? certification or equivalent experience ●Want to deploy network architecture efficiently ●Guaranteed solutions pass testing ●Upgrade paths to support business development)