Function jointly provided by STG and STI


When the 2M clock or the IEEE 1588v2 function is required, a clock port is required to receive external clock signals.
For the OSN 8800 T32/T64, TN52STG and TNK2STG boards do not provide a clock port, and the external clock port is provided by the STI board.
For the OSN 6800, it does not support an STI board. An STG board provides an external clock port.

Other related questions:
What functions does MPLS ping provide
In MPLS, the control panel used for establishing an LSP cannot detect the failure in data forwarding of the LSP. This makes network maintenance difficult. The MPLS ping mechanism detects LSP errors and locates faulty nodes. Similar to IP ping, MPLS ping checks LSP connectivity through MPLS Echo Request and MPLS Echo Reply messages. These messages are transmitted in User Datagram Protocol (UDP) packets with the port number being 3503. An MPLS Echo Request message carries FEC information to be detected, and is sent along the same LSP as other packets with the same FEC. In this manner, LSP connectivity is checked. In MPLS ping, an MPLS Echo Request message reaches the egress node of the LSP, and the control panel of the egress node checks whether the local LSR is the egress of the FEC. To prevent the egress node from forwarding the received Echo Request message to other nodes, the destination address in the IP header of the Echo Request message is set to (the local loopback address), and the TTL value contained in the IP header is set to 1.

Difference between STI and STG, and whether STI or STG can work independently
An STI board is a clock interface board that inputs and outputs clock signals. An STG board is a clock processing board that provides clock signals and frame header signals for the system. STI is optional. It is required only when the 2M clock or IEEE 1588v2 function is required or when and the BITS clock needs to be connected to an OCS system.

Whether the STG board is mandatory
The OSN 8800 of version V100R002 or later is a synchronous system, requiring that all service boards and cross-connect boards are synchronized (with the same frequencies and aligned frame headers). Therefore, a unique reference clock signal and a unique frame header are required. To meet this requirement, each service board outputs services based on the clock signal and frame header of the clock board. Therefore, the STG board is mandatory for the OSN 8800 of version V100R002 or later. Otherwise, centralized service grooming cannot be implemented. The OSN 6800 is asynchronous, having no requirement on a unique clock signal or frame header. Therefore, no clock board is required. The STG board is required only when IEEE 1588v2 needs to be enabled at the electrical layer.

Functions provided by Huawei Storage Networking Assistant
Functions provided by Huawei Storage Networking Assistant include: Huawei Storage Product Networking Assistant is a web tool that provides typical networking modes of storage products with different configurations. Users can quickly obtain networking diagrams and complete networking connections without memorizing complex networking rules. In addition, users can customize networking diagrams based on the site conditions to meet their requirements.

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