IELAB is starting to update EI CCIE LAB. SDN is the latest technology in dumps of EI CCIE. For a smooth PASS EI, you must first understand the Role of Cisco ISE and Cisco DNA Center in SD-Access.
Cisco SD-Access provides automated end-to- end segmentation to separate user, device, and application traffic without redesigning the network. Cisco SD-Access automates user access policy so organizations can make sure that the right policies are established for any user or device with any application across the network. The two most important solution components are Cisco ISE and Cisco DNA-Center.
DNA Center and ISE Integration
Identity Services Engine:
Cisco ISE is a secure network access platform enabling increased management awareness, control, and consistency for users and devices accessing an organization’s network. ISE is a part of SD-Access for policy implementation, enabling dynamic mapping of users and devices to scalable groups and simplifying end-to-end security policy enforcement. Within ISE, users and devices are shown in a simple and flexible interface. ISE integrates with Cisco DNA Center by using Cisco Platform Exchange Grid (pxGrid) and REST APIs for exchange of client information and automation of fabric-related configurations on ISE. The SD-Access solution integrates Cisco TrustSec by supporting group-based policy end-to-end, including SGT information in the VXL _AN headers for data plane traffic, while supporting multiple VNs using unique VNI assignments. Groups, policy, Authentication, Authorization, and Accounting (AAA) services, and endpoint profiling are driven by ISE and orchestrated by Cisco DNA Center’s policy authoring workflows. Scalable groups are identified by the SGT, a 16-bit value that is transmitted in the VXLAN header. SGTs are centrally defined, managed, and administered by Cisco ISE. ISE and Cisco DNA Center are tightly integrated through REST APIs, with management of the policies driven by Cisco DNA Center. ISE supports standalone and distributed deployment models. Also, multiple distributed nodes can be deployed together supporting failover resiliency. The range of options allows support for hundreds of thousands of endpoint devices, with a subset of the devices used for SD-Access to the limits described later in the guide. Minimally, a basic two-node ISE deployment is recommended for SD-Access deployments, with each node running all services for redundancy. SD-Access fabric edge node switches send authentication requests to the Policy Services Node (PSN) persona running on ISE. In the case of a standalone deployment, with or without node redundancy, that PSN persona is referenced by a single IP address. An ISE distributed model uses multiple active PSN personas, each .with a unique address. AlI PSN addresses are learned by Cisco DNA Center, and the Cisco DNA Center user maps fabric edge node switches to the PSN that supports each edge node。
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Cisco DNA Center:
At the heart of automation of the SD-Access solution is Cisco DNA Center. SD-Access is enabled with an application package that runs as part of the Cisco DNA Center software for designing, provisioning, applying policy, and facilitating the creation of an intelligent campus wired and wireless network with assurance.
Cisco DNA Center centrally manages major configuration and operations workflow areas.
DNA Center SD-Access Workflow
●Design–Configures device global settings, network site profiles for physical device inventory, DNS, DHCP, IP addressing, Software Image Management, plug-and-play, and user access.
●Policy一- Defines business intent for provisioning into the network, including creation of virtual networks, assignment of endpoints to virtual networks, and policy contract definition for groups.
●Provision- Provisions devices for management and creates fabric domains, control plane nodes, border nodes, edge nodes, fabric wireless, Cisco Unified Wireless Network wireless, transit, and external connectivity.
●Assurance– Enables proactive monitoring and insights to confirm that user experience meets configured intent, using network, client, and application health dashboards, issue management, and sensor-driven testing.
●Platform- Allows programmatic access to the network and system integration with third-party systems using APIs, using feature set bundles, configurations, a run-time dashboard, and a developer toolkit.