Whether the standby cross-connect board needs to be forcibly configured for electrical-layer ASON

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The standby cross-connect board is not mandatory, but is recommended to ensure normal service operation.

Other related questions:
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.

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.

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 a cross-connect board is required when ND2 is used to achieve electrical regeneration
The cross-connect board is not mandatory in this scenario. If the cross-connect board is configured, you can configure pass-through services to achieve electrical regeneration. If no cross-connect board is configured, you can configure ND2 in electrical regeneration mode to achieve regeneration of OTU2 and OTU2e signals.

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
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.

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