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stratum / stratum / docs / tai / README.md

Yi-Tseng

Cleanup TAI implementation (#224)

df64df5 21 days ago

2 contributors

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Transponder Abstraction Interface(TAI)

support

This document provides an overview of the TAI library and interaction with TAI library

wrapper and Stratum.

The Overview

Figure below shows the overview of components which related to TAI support, we will cover

these components from bottom to the top in following sections.

TAI Interface

gNMI

Switch Broker Interface

PHAL

TAI PHALTAI Switch Configurator

PHAL Database

Optical Adapter

TAI Data Source

TAI Wrapper

TAI Shell Server libtai.so

gNMI and Stratum types

gNMI.proto

common.proto

Stratum common types

common.proto

phal.proto

db.proto

TAI types

taish.proto

taitypes.h

gRPC

TAI C++ API

Terminology

Adapter Host - is hardware-independent software which uses the TAI interface to

provide optical transponder functionality to other parts of the system. An adapter host

loads the shared library adapter.

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Summary of content (7 pages)

PAGE 1
Branch: master Find file Copy path stratum / stratum / docs / tai / README.md Yi-Tseng Cleanup TAI implementation (#224) df64df5 21 days ago 2 contributors Raw Blame History 287 lines (199 sloc) 11.8 KB Transponder Abstraction Interface(TAI) support This document provides an overview of the TAI library and interaction with TAI library wrapper and Stratum.
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Module - is an object which represent an optical module (e.g., AC400 that is used in Voyager transponder). Host Interface - is an object which represents an interface between an optical module and the host system, sometimes called client interface. Actually, this is an interface between an optical module and Ethernet ASIC. Network Interface - is an object which represents hardware components that transmits/receives one wavelength.
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2. Stop Taish server: systemctl stop taish-server.service 3. Pull and re-insert the big line-cards from both switches (on both sides) 4. Start taish server: systemctl start taish-server.service 5.
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This component provides a common layer between PHAL database and the TAI interface. It will call functions from TAI interface (the wrapper) directly to get/set information for a specific TAI network interface. OpticsAdapter The optics adapter helps PHAL to access the PHAL database. It basically create a database get or set request based on the function call from PHAL layer and returns the result.
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uint64 operational_mode = 6; } int32 id = 1; repeated NetworkInterface network_interfaces = 2; } message PhalDB { // ... repeated OpticalModule optical_modules = 6; } Note that we are not supprting configuring the Hoet Interface in TAI for now. This may be a future task that contributed by the community. Supported OpenConfig models(gNMI paths) The OpenConfig model provides an optical channel configuration. Below are YANG models on GitHub we are using for TAI support: https://github.
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Note: The line port should be a reference to another node. Currently, they are both read-only value, which has set through the initial ChassisConfig (for both "state" and "config"). /components/component[name]/state/type Note: will get "OPTICAL_CHANNEL" if it is an optical component ChassisConfig extensions A new OpticalNetworkInterface protobuf message was introduced into the ChassisConfig. It stores the data required by the Stratum to set up and some initial optical network interface configuration.
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terminal-opticalchannel-state attribute gNMI path under Corresponding TAI /comonents/component[name]/ attribute output-power state/output-power CURRENT_OUTPUT_POWER input-power state/input-power CURRENT_INPUT_POWER Note: The "operational mode" is a vendor-specific configuration of the channel represented by 16 bits. In TAI, we set modulation only. The following table pictures the bidirectional mapping of operational mode and modulation.