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Advanced Peer-to-Peer Networking Overview
114049 Rev. A 1-9
Interfaces
Interfaces provide data link control (DLC) processes to ensure reliable delivery of
information between adjacent stations using a specific data link protocol, such as
LLC or SDLC.
Each APPN interface can support one or more ports.
A system-assigned DLC number (such as DLC00008) identifies APPN interfaces
on Bay Networks network nodes.
For information on adding and enabling APPN interfaces on Bay Networks
network nodes, refer to Chapter 2.
Ports
A port provides a unique access point (such as a MAC/SAP address pair) used by
the local Bay Networks network node. A port in an APPN network has a DLC
process and a set of configurable parameters.
Link Stations
A link station is a logical connection between adjacent nodes. Link stations use
ports to create this connection. Multiple link stations can exist on a single port,
and multiple link stations can exist between the same two nodes. You can
configure a link station entry, or APPN creates it dynamically when a remote node
initiates a connection.
Link stations have a set of configurable parameters, such as
Link station name and the name of the adjacent node
Adjacent link station role: primary, secondary, or negotiable
Adjacent link station definitions, such as MAC and SAP addresses
Note: The term link often refers to the physical components that enable two
adjacent link stations to communicate. Within APPN, a link refers to a logical
connection between two nodes. The term transmission group (TG) is also used
throughout this manual and has the same meaning as link.
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