Network Slicing Using Channelized Sub-Interfaces and FlexE
Both channelized sub-interfaces and FlexE (Flexible Ethernet) are used for network slicing, but they have different application scenarios:
✅ A. Channelized sub-interface is recommended for interfaces with bandwidth < 50 Gbit/s.
Channelized sub-interfaces split a physical interface into multiple logical sub-interfaces.
Best for lower-bandwidth links (<50 Gbit/s).
✅ B. FlexE is recommended for 50GE and higher-rate interfaces.
FlexE divides 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