H12-891_V1.0 Exam Dumps : HCIE-Datacom V1.0

The basic constructs in YANG data modeling include:

Leaf node – A single data element with a specific type (e.g., integer, string).

List node – A repeating set of elements, each structured the same.

Incorrect options:

A. Set node – ❌ Not a valid YANG construct.

D. Tree node – ❌ Not an individual data model element. The entire model forms a tree structure, but there is no “tree node” in YANG syntax.

Exact Extract – Huawei YANG Modeling Fundamentals:

“YANG defines elements such as leaf, list, container, choice, and leaf-list. 'Set' and 'tree' are not YANG node types.”

BGP EVPN Type 2 Route (MAC/IP Advertisement Route)

This route carriesMAC and IP address bindingsto inform remote VTEPs about locally learned endpoints.

Why Use arp collect host enable?

Collects ARP entriesof locally connected hosts.

EnablesBGP EVPN Type 2 route generationto distribute the learned ARP information.

Incorrect Answer Explanations:❌A. mac-address xxxx-xxxx-xxxx– Manually configures a MAC address butdoes not enable ARP collection for EVPN Type 2 routes.❌B. arp-proxy enable– Enables ARP Proxy butdoes not advertise ARP information using BGP EVPN.❌D. arp distribute-gateway enable– Used inDistributed Anycast Gateway (DAG) modebutnot for collecting host ARP data.

Reference from Huawei HCIE-Datacom Documentation:

Huawei VXLAN EVPN Configuration Guide – ARP Handling and EVPN Type 2 Routes

HCIE-Datacom Training Material – VTEP ARP Advertisement in VXLAN Networks

Comprehensive and Detailed In-Depth Explanation:

In theCloudCampus public cloud scenario, when devices are deployed through theHuawei registration query center, there isno need to configure DHCP Option 148on the campus network’s DHCP server.

Theregistration query centerautomatically provides thecontroller IP addressto the devices during the registration process.

DHCP Option 148is typically used to provide theiMaster NCE-Campus addressin on-premises or private cloud scenarios.

In thepublic cloud scenario, the devices obtain this information directly from the Huawei cloud platform, makingOption 148 unnecessary.