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AIX Version 4.3 Communications Programming Concepts

DLC8023 Device Manager Nodes

The DLC8023 device manager on an Ethernet local area network (LAN) operates between two or more nodes using medium access control (MAC) procedures and IEEE 802.2 logical link control (LLC) procedures. MAC and LLC procedures are defined in the IEEE Project 802 Local Area Network Standards. Specific state tables used are found in the Token-Ring Network Architecture Reference. The DLC8023 device manager supports:

The DLC8023 device manager provides full-duplex, peer-data transfer capabilities over an Ethernet LAN. The Ethernet LAN must use the IEEE 802.3 carrier sense multiple access with collision detection (CSMA/CD) medium access control protocol and a superset of the IEEE 802.2 LLC protocol.

Note: Multiple adapters are supported with a maximum of 255 logical attachments per adapter.

LLC refers to the DLC manager, access-channel, and link station (LS) subcomponents of a GDLC component, such as the DLC8023 device manager, as illustrated in the DLC8023 Component Structure figure.

Each LS controls the transfer of data on a single logical link. The access channel performs multiplexing and demultiplexing for message units flowing from the link stations and DLC manager to MAC. The DLC manager performs the following actions:

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