HP UX 11i v2 Networking Software manual Attach Service, Bind Service

Introduction to DLPI

DLPI Services

	Attach Service
	The attach service assigns a physical point of attachment (PPA) to a
	stream. This service is required for style 2 DLS providers to specify the
	physical medium over which communications will occur. The DLS
	provider indicates success with a DL_OK_ACK message and failure with
	a DL_ERROR_ACK message. The normal message sequence is
	illustrated in Figure 1-4.
Figure 1-4	Message Flow: Attaching a Stream to a Physical Line
	DL_ATTACH
	request
	DL_OK
	acknowledge
	A PPA may be disassociated with a stream using the
	DL_DETACH_REQ. The normal message sequence is illustrated in
	Figure 1-5.
Figure 1-5	Message Flow: Detaching a Stream to a Physical Line
	DL_DETACH
	request
	DL_OK
	acknowledge

Bind Service

The bind service associates a data link service access point (DLSAP) with a stream. The DLSAP is identified by a DLSAP address.

DL_BIND_REQ requests that the DLS provider bind a DLSAP to a stream. It also notifies the DLS provider to make the stream active with respect to the DLSAP for processing connectionless data transfer and connection establishment requests. DL_SUBS_BIND_REQ provides the added capability on binding on multiple DLSAP addresses.

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