300-435 Question 138
Single answerYou are tasked with deploying several new branch routers across your organization using Cisco Plug and Play (PnP). These routers need to connect to the PnP server to obtain their configuration automatically. However, the devices are not connecting as expected. Upon investigation, you find that the device's PnP discovery process is failing. Which method would you use to resolve the issue by ensuring the devices can locate the PnP server?
- A
Manually configure the PnP server IP address on the devices via console.
- B
Ensure the DHCP server is providing the PnP server's IP address using Option 43.
- C
Verify that the DNS server has a valid entry for pnpserver.domain.com.
- D
Use a USB drive to load the configuration directly onto the devices.
Show answer and explanation
Correct answer: B
Explanation
Cisco PnP enables zero-touch provisioning for network devices, eliminating the need for manual configuration. During the PnP discovery process, devices rely on methods such as DHCP Option 43 to locate the PnP server. This is the most effective and automated solution for ensuring devices connect to the PnP server in a scalable environment.
- A. Incorrect.
Manually configuring the PnP server IP address is not ideal in a large-scale deployment scenario and defeats the purpose of automating the setup via Plug and Play.
- B. Correct.
Using DHCP Option 43 is a standard and automated way to inform devices of the PnP server's IP address. This ensures the devices can locate the server during the discovery process.
- C. Incorrect.
While DNS can be configured to resolve 'pnpserver.domain.com', this is not a guaranteed or standard approach for PnP discovery. It depends on additional DNS setup and may not be reliable in certain environments.
- D. Incorrect.
Using a USB drive to load the configuration is a manual process and does not leverage the automation capabilities of Cisco PnP.