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NE20E-S V800R010C10SPC500 Feature Description - Interface and Data Link 01

This is NE20E-S V800R010C10SPC500 Feature Description - Interface and Data Link
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Application of FlexE Interfaces

Application of FlexE Interfaces

The need for higher bandwidth on the mobile bearer is increasing as 4.5G and 5G networks continue to be developed. In addition, carriers want a unified network to transmit various services, such as home broadband, leased line access, and mobile bearer. These factors place significant requirements on telecommunication network interfaces. To isolate services, flexible Ethernet (FlexE) technology assigns bandwidth to specific interfaces. FlexE interfaces can be isolated independent of each other. Traffic is isolated at the physical layer, and network slicing is performed for services on the same physical network.

FlexE technology applies to the access, aggregation, and core layers. As 5G services transition through the initial, development, and maturity phases, the service volume increases gradually. FlexE technology allows the bearer network to be smoothly upgraded.

FlexE technology provides long-distance transmission performance. When working in FlexE mode, interconnected physical interfaces that have been added to interface groups are used for transmission. Figure 2-6 shows an example of using FlexE interfaces.

Figure 2-6 Application example of FlexE interfaces

A standard physical Ethernet interface can be switched to FlexE mode using a specific command.When a physical interface is switched from standard Ethernet mode to flexible Ethernet (FlexE) mode, FlexE interfaces are generated.For example, after the interface 50|100GE 0/9/0 is switched to a physical interface in FlexE mode, the interface name is changed to FlexE-50|100GE 0/9/0. Additionally, a series of FlexE interfaces named FlexE 0/9/129 to FlexE 0/9/148 are generated. slot-id/card-id in the service interface number is consistent with that in the physical interface number.Bandwidth for a FlexE interface can be flexibly specified.

FlexE technology divides the PHY layer of a physical Ethernet interface into multiple identical sub-timeslots, all of which have the same bandwidth value. The bandwidth values of multiple sub-timeslots can be flexibly combined into logical interface bandwidth values, that is, the bandwidth of FlexE interfaces.

  • If the sub-timeslot granularity uses the default value of 5 Gbit/s, the bandwidth value of a FlexE interface is an integer multiple of 5 Gbit/s, such as 5 Gbit/s, 10 Gbit/s, 15 Gbit/s, and so on.

  • If the sub-timeslot granularity is set to 1 Gbit/s, the bandwidth value of a FlexE interface is 1 Gbit/s, 2 Gbit/s, 3 Gbit/s, 4 Gbit/s, 5 Gbit/s, or an integer multiple of 5 Gbit/s.

  • If the sub-timeslot granularity is set to 1.25 Gbit/s, the bandwidth value of a FlexE interface is 1.25 Gbit/s, 2.5 Gbit/s, 3.75 Gbit/s, 5 Gbit/s, or an integer multiple of 5 Gbit/s.

As shown in Figure 2-7, the subcard's physical interfaces in FlexE mode can be added to the FlexE group, the total bandwidth resources for which can be allocated on demand for FlexE interfaces. In this way, bandwidth is flexibly assigned to each type of service and to each leased line user.

Figure 2-7 Relationship between physical interfaces in FlexE mode and FlexE interfaces

FlexE technology allows services to receive different bandwidth and therefore meets network slicing requirements. As a result, a physical network can support the customization of numerous services with different SLAs, which allows significant business value to be created.

  • One network is used for a variety of purposes, which maximizes network values. A FlexE interface is equivalent to an independent physical interface. On a sliced network, traffic, protocols, and O&M of any network slice do not affect the other network slices.
  • Fast network iteration is achieved. Deployment of new services on the existing network depends on pipes. Pipe changes, such as adding or deleting nodes and expanding link capacity, all affects services. FlexE technology enables smooth network expansion without compromising services.
  • Network adjustment costs are minimized. FlexE technology adjusts bandwidth on demand and avoids unnecessary hardware costs, such as board replacement. Only the involved FlexE interfaces need to be added or deleted, which reduces time and costs.
  • Carriers are assisted in service innovation. During service innovation, carriers can introduce new services to independent network slices without changing the existing network structure. In this way, new services can be rolled out quickly to maximize benefits.
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Updated: 2019-01-03

Document ID: EDOC1100055118

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