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

Network Slicing Using Channelized Sub-Interfaces and FlexE

Bothchannelized sub-interfacesandFlexE (Flexible Ethernet)are used fornetwork slicing, but they have differentapplication scenarios:

✅A. Channelized sub-interface is recommended for interfaces with bandwidth < 50 Gbit/s.

Channelized sub-interfacessplit a physical interfaceinto multiple logical sub-interfaces.

Best for lower-bandwidth links (<50 Gbit/s).

✅B. FlexE is recommended for 50GE and higher-rate interfaces.

FlexEdivides a high-bandwidth physical link(e.g.,100GE, 400GE) into multiple virtual slices.

Used in high-speed backbone and data center networks.

✅C. Only FlexE-based network slicing can be deployed across OTN devices.

FlexE is compatible with Optical Transport Network (OTN)and can be used for long-haul slicing across OTN.

❌D. Only channelized sub-interface-based network slicing can be deployed across MSTP devices.

Incorrect!While MSTP supports channelized interfaces,FlexE is not restricted to MSTP deployment.

Reference from Huawei HCIE-Datacom Documentation:

Huawei FlexE Technology Whitepaper – Network Slicing in Transport Networks

HCIE-Datacom Training Material – Channelized Sub-Interface and FlexE in Network Slicing

Comprehensive and Detailed In-Depth Explanation:

The IP prefix list configuration:

ip ip-prefix TEST permit 10.0.0.0 24 less-equal 30

10.0.0.0/24: Matches because it falls within the10.0.0.0/24prefix with thesame prefix length (24).

10.0.1.0/24: Matches because it also falls within the/24network range.

10.0.2.0/24: Matches for the same reason as the above.

10.0.0.1/30: Matches because it falls within the/24 prefixand itssubnet length (30)is within theless-equal 30range.

The prefix list permits any route that falls within the10.0.0.0/24network with asubnet mask ranging from /24 to /30. Therefore,all given routes are matched.

Comprehensive and Detailed In-Depth Explanation:

AnNVE (Network Virtualization Edge) interfaceis responsible for connecting physical or virtual devices to a VXLAN network. It functions as theVTEP (VXLAN Tunnel Endpoint)and supportsencapsulation and decapsulation of VXLAN packets.

Layer 2 VXLAN gateway (D)is used for intra-subnet communication, but theNVE interfaceis the actual point where traffic enters the VXLAN network.

Layer 3 VXLAN gateway (A)is used for inter-subnet communication.

VLANIF interface (C)is used for VLAN-based communication, not directly for VXLAN.

Therefore, theNVE interface (B)is the correct answer as it serves as thetraffic ingress and egress point for the VXLAN network.