Cisco DCACI 300-620 study guide
Cisco DCACI 300-620 · Work through your exam, one topic at a time.
Cisco DCACI 300-620 (Implementing Cisco Application Centric Infrastructure) is a Cisco exam focused on deploying and operating an ACI fabric. It suits data center engineers, network consultants, and virtualization or automation specialists who design, implement, or support Cisco's application-centric data center architecture in enterprise and service provider environments. The Cisco DCACI 300-620 study guide has 5 sections and about 2,354 words.
01ACI Fabric Infrastructure
Domain 1 covers the physical and logical skeleton of the fabric: what spines and leaves each do, how a new switch is bootstrapped and discovered, and which objects hold policy. Questions are conceptual but hinge on exact roles - which device forwards traffic, which one stores endpoint locations, and which one sits outside the data path.
520 words, about 3 min02ACI Packet Flow
Domain 2 follows a frame from the source leaf to the destination leaf: where the forwarding decision is made, what goes into the VXLAN header, where contracts are checked, and how flooded traffic moves. The ingress leaf receives the frame on a static path or VMM binding and identifies the source EPG.
462 words, about 2 min03ACI Fabric Management
Domain 3 tests the day-2 side of ACI: who can log in and what they can touch, how controllers and switches are upgraded, how configuration is protected and restored, and how the fabric reports health. Authentication can be local, TACACS+, RADIUS, or LDAP; accounting is available on TACACS+ and RADIUS.
462 words, about 2 min04ACI Fabric Connectivity
Domain 4 is the configuration core: building forwarding domains inside a tenant and connecting them to the outside world, with contracts and routing policies that make the design work. VRF policy enforcement mode: enforced (default) applies contracts; unenforced disables contract filtering for the whole VRF, a silent way to make a broken contract "work".
457 words, about 2 min05Integrate ACI with External Tools
Domain 5 covers the interfaces ACI exposes to everything outside it: hypervisor integration, the REST API and automation tooling, L4-L7 service insertion, and monitoring exports. Everything in the GUI is a REST call.
453 words, about 2 min