Cisco LAN automation workflow helps enterprise IT administrators prepare, plan, and automate greenfield networks. In the question, it is a brownfield deployment scenario and manual underlay is more appropriate.
In a brownfield deployment scenario, the deployment of the underlay network must be taken with manual configuration. The other configurations, such as subnet stretching, LAN automation, and automated underlay, can be done with the help of Cisco DNA Center.
I was absolutely sure it's D, but then I re-read the question and realized this "must be taken WITH Cisco DNA center". Manual underlay is not done "with" Cisco DNA center, so the only logic answer can be LAN automation
I just reconsidered this few days later. While the question asks for one answer only, the correct one can only be Manual underlay (configuration). The other 3 are done together.
It should be B- LAN automation. The question is regarding the action to take using DNA Center, and LAN automation is one of those actions (in addition to subnet stretching, and automated underlay). If the question was "which configuration deployment must be taken with deployment of the underlay network", then the answer would be D- Manual Underlay. As such the correct answer is B.
B - LAN Automation in Cisco DNA Center for configuration of Underlay in SDA
LAN Automation for deployment—The configuration of the underlay can be orchestrated by using LAN Automation services in Cisco DNA Center. The LAN Automation feature is an alternative to manual underlay deployments for new networks and uses an IS-IS routed access design. Although there are many alternative routing protocols, the IS-IS routing protocol offers operational advantages such as neighbor establishment without IP protocol dependencies, peering capability using loopback addresses, and agnostic treatment of IPv4, IPv6, and non-IP traffic. Manual underlays are also supported and allow variations from the automated underlay deployment (for example, a different IGP could be chosen), though the underlay design principles still apply.
provided answer is correct.
https://www.cisco.com/c/en/us/td/docs/cloud-systems-management/network-automation-and-management/dna-center/tech_notes/b_dnac_sda_lan_automation_deployment.html
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