Introduction to DLPI
DLPI Services
•The DLS provider will discard all DLSDUs submitted before the issuing of the DL_RESET_REQ that have not been delivered to the peer DLS user when the DLS provider issues the DL_RESET_IND.
•The DLS provider will discard all DLSDUs submitted before the issuing of the DL_RESET_RES that have not been delivered to the initiator of the DL_RESET_REQ when the DLS provider issues the DL_RESET_CON.
•No DLSDU transmitted by a DLS user after the synchronization mark in that transmitted stream will be delivered to the other DLS user before the synchronization mark in that received stream.
The complete message flow depends on the origin of the reset, which may be the DLS provider or either DLS user. Figure
Figure 1-23 Message Flow: DLS User-Invoked Connection Reset
DL_RESET request
DL_RESET confirm
DL_RESET indication
DL_RESET response
DL_OK acknowledge
Figure 1-24 illustrates the message flow for a reset invoked by both DLS users simultaneously.
Figure 1-24 Message Flow: Simultaneous DLS User-Invoked Connection Reset
DL_RESET request
DL_RESET confirm
DL_RESET request
DL_RESET confirm
Figure 1-25 illustrates the message flow for a reset invoked by the DLS provider.
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