Avaya Configuring APPN Services Uživatelský manuál stáhnout pdf (Strana 39)

Advanced Peer-to-Peer Networking Overview

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In APPN end nodes, TRS creates and maintains the COS database, and maintains

the local topology database (also maintained by TRS at the network node). The

local topology database contains information on connections involving the local

end nodes: end node-to-end node, end node-to-network node, and end

node-to-virtual routing node.

For LU-LU sessions, TRS computes the optimal route through an APPN network

between the two nodes on which the LUs reside. A route in an APPN network is

an ordered sequence of nodes and transmission groups (TGs) that represents a

path from an origin to a destination, called a Route Selection Control Vector

(RSCV). In APPN end nodes, TRS uses the local database to select possible

transmission groups from the end node to an adjacent node. In APPN network

nodes, TRS uses the information provided by the two end nodes, together with the

information in the network node’s COS and topology database, to select a route.

Configuration Services

Configuration services (CS) manages links to adjacent APPN nodes. The APPN

node operator facility (NOF) initializes configuration services through Site

Manager.

The basic configuration functions are:

• Node definition

• Interfaces

•Ports

• Adjacent link stations

• Connection networks

• Directory services

Refer to Chapter 3, “Editing APPN Parameters,” for detailed information on

configuring APPN nodes.

Management Services

Management services (MS) controls and monitors the node’s resources. If an error

condition occurs, APPN receives or generates event messages about resources and

conditions. For information on the APPN event messages, refer to Event Messages

Database.

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Avaya Configuring APPN Services Uživatelský manuál Strana 39