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Difficulty: MediumCisco DNA Center Enabled Device Management

A network engineer is deploying new Cisco Catalyst switches across multiple branch offices using Cisco DNA Center Network Plug and Play (PnP). The switches are unpacked and powered on with default factory settings. Which mechanism enables these unconfigured devices to locate the Cisco DNA Center controller for Day-0 automated onboarding?

  1. DHCP Option 43 configured on the local DHCP server specifying the Cisco DNA Center controller IP address.Answer
  2. B
    An automated Ansible playbook configured to discover devices via SSH and push the initial configuration.
  3. C
    Configuring 'ip helper-address' on the WAN egress interface pointing directly to the Cisco DNA Center REST API endpoint.
  4. D
    A Layer 2 discovery sweep using CDP and LLDP initiated by Cisco DNA Center across non-routable broadcast domains.

Answer

DHCP Option 43 configured on the local DHCP server specifying the Cisco DNA Center controller IP address.
In Cisco Network Plug and Play (PnP), factory-default devices request an IP address via DHCP upon boot. By configuring DHCP Option 43 on the local DHCP server, the server returns vendor-specific information containing the IP address or URL of the Cisco DNA Center PnP server, enabling the switch to automatically contact the controller for Day-0 provisioning.

Step-by-Step Solution

1
Identify the requirement for Day-0 network device onboarding in Cisco DNA Center.
The devices are in a factory-default state without IP addresses or SSH credentials configured.
Day-0 provisioning relies on Network Plug and Play (PnP) zero-touch discovery mechanisms.
2
Evaluate how unconfigured devices request network configuration and controller location.
Upon booting, the device sends a DHCP request to acquire an IP address and vendor-specific DHCP options.
DHCP Option 43 conveys the IP address of the PnP server (Cisco DNA Center) to the device.
3
Select the correct discovery mechanism.
DHCP Option 43 allows the switch to automatically locate and establish communication with Cisco DNA Center.
This enables fully automated, zero-touch Day-0 device provisioning.

Key Concept

Cisco DNA Center Network Plug and Play (PnP) Day-0 Discovery
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Topics

Cisco DNA Center Enabled Device Management

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