Whether the NM_ETH port or the ETH port is used for communication between optical NEs and electrical NEs when optical NEs and electrical NEs are separated from each other

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The NM_ETH port (the one connecting to the NMS) is used for communication between optical NEs and electrical NEs.

Other related questions:
Relationship between optical NEs and electrical NEs on an ASON network
When the optical and electrical NEs of an ASON NE are not split, the OTU or FIU boards on the ASON NE can function as edge points, and the related TE links can be automatically created when the boards are created. When the optical and electrical NEs are split, the multiplexer/demultiplexer or other optical-layer boards can function as the edge points of the optical NEs. When the fiber connections between the optical ports on the multiplexer/demultiplexer boards and those on the OTU boards are created, the intra-NE links that carry OCh signals are automatically created.

OSN 8800 NE resource grouping to OTN optical NEs
Select an optical NE. Right-click it and choose Attribute from the shortcut menu. Navigate to the Resource Division window. In the window, find the desired OptiX OSN 8800 NE from idle NEs and add the NE to the right-side box. Then click OK.

Whether electrical cross-connections need to pass through when services are provisioned between OptiX OSN 6800 NEs and no signals are added to or dropped from the intermediate NE
In this scenario, electrical signals are not involved and therefore no electrical cross-connection needs to pass through.

Relationship between the node ID of an ASON NE and an NE ID
Relationship between the node ID of an ASON NE and an NE ID: The node ID of an NE must be different from the IP address of an NE and must be unique on the entire network. The node ID is independent of the NE ID and NE IP address.

Differences between the primary NE and gateway NE on an ASON network
The primary NE is responsible for communication between the ASON network and U2000 server. It transmits information on the ASON control plane and reports ASON events to the U2000 server. An ASON domain can have only one primary NE and one secondary NE. A gateway NE is connected with the U2000 server using the TCP/IP protocol. Generally, an NE that is connected to the U2000 server through a LAN or WAN is a gateway NE. Multiple gateway NEs can be connected to the U2000 server. Generally, you can configure the primary or secondary NE as the gateway NE on an ASON network to leverage ECC bandwidth resources.

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