ROADM and its application scenarios

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The ROADM technology achieves reconfiguration of wavelengths by adjusting the pass-through or block status of the wavelengths, making the static distribution of wavelength resources flexible and dynamic.
ROADM with the U2000 can remotely and dynamically adjust the status of wavelength adding/dropping and passing through for a maximum of 80 wavelengths. Huawei ROADM technology can be applied to the following scenarios:
1-degree optical-layer grooming: Generally it applies to a terminal node and services are not interrupted during expansion.
2-degree optical-layer grooming: It achieves service transmission in two directions.
3-degree optical-layer grooming: It achieves service transmission in three directions.
4-degree optical-layer grooming: It achieves service transmission in four directions.
9-degree optical-layer grooming: It achieves service transmission in nine directions.

Other related questions:
Aggregation interruption function and its application scenario
Visit the following website to find out what the aggregation interruption function is used for and when should this function be enabled: FAQ-What is the aggregation interruption function used for? When should this function be enabled

QinQ and its application value
As Ethernet technologies are widely used on carrier networks (metro Ethernet networks), the standard VLAN defined in IEEE 802.1q alone cannot completely distinguish between users or isolate a large number of users. This is because the 12-bit VLAN tag field defined in IEEE 802.1q identifies a maximum of only 4096 VLANs. To expand VLAN tags in quantity, the QinQ technology is developed. It adds another 802.1q tag to a packet that already carries an 802.1q tag. With this technology, the system supports up to 4096 x 4096 VLANs. As metro Ethernet develops and a greater variety of services are deployed, there are more scenarios in which QinQ double tags can be applied. The inner tag (C-VLAN) indicates the user, and the outer tag (SVLAN) indicates the service.

What are the application scenarios of CES
The application scenarios of CES include routine management, alarm notification and capacity adjustment.

Application scenarios of the S1700
S1700 switches are classified into the SNMP-based model, web-managed model, and NMS-free model.

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