Reason why the recommended usage status of ASON overhead bytes is set to "Disabled" for tributary boards when electrical-layer ASON features are enabled on an ASON network

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For electrical-layer ASON, tributary boards cannot transmit ASON management bytes. Therefore, you are advised to set the usage status of ASON overhead bytes to "Disabled" for the tributary boards.

Other related questions:
Restrictions on a network for which both optical-layer ASON and electrical-layer ASON are configured
Optical-layer ASON and electrical-layer ASON can be configured on the same network but they cannot be configured on the same NE.

Reason why CSPF is used on ASON networks
Constraint Shortest Path First (CSPF) is a routing algorithm that calculates the optimal route for a service, ensuring that the service is quickly restored after rerouting.

Whether there are restrictions on the number of TE links on an optical-layer ASON network or an electrical-layer ASON network
On an optical-layer ASON network, a TE link can only be created between FIU boards. The quantity of TE links is determined by the NE scale of the network. Generally, only a few TE links are configured on the network. On an electrical-layer ASON network, ODUk links of different levels can be created based on line board types. Generally, a large number of TE links are configured on the network. An electrical-layer ASON network has far more TE links than an optical-layer ASON network. More links on a network will consume more network resources. Therefore, it is required that an electrical-layer ASON network be smaller than an optical-layer ASON network.

Whether OLP boards can be used in electrical-layer ASON
Huawei OTN ASON solution can be implemented in two ways: optical-layer ASON (OTN_O) and electrical-layer ASON (OTN_E). Optical-layer ASON achieves service grooming at the OCh wavelength level, while electrical-layer ASON achieves service grooming at the ODUk sub-wavelength level.

Principles for automatic discovery of electrical-layer TE links for ASON services
Electrical-layer TE links for ASON services are verified through electrical-layer overhead bytes. For the principles of automatic TE link discovery, see the ASON User Guide.

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