Installation guide

96 DC 900-1564A

Synchronous Link Control (SLC) Programmer’s Guide

6.5.2 Receive Error Statistics

Note that in order to minimize non-productive reports of errors, the SLC protocol ser-

vice maintains local link statistics for several types of receive errors rather than report-

ing them by means of the

iICPStatus field in a response. The receive errors in this class

are shown in Table 6–7 in the context of the link statistics ﬁelds which count them.

SLC_ERR_SIZE

The message is too large to be transmitted in sixteen or fewer

SLC information blocks formatted in accordance with the cur-

rent SLC_SERVICE_CFG conﬁguration.

SLC_ERR_TOO_LATE

The DLI_PROT_SAFE_STORE_ACK command was received too late

to send acknowledgment. Either the remote site has commenced

message retransmission, or a change in the SLC network con-

nection state invalidates acknowledgment at this time

Table 6–7: Link Statistics Receive Error Codes

Receive Error Code

Link Statistics Field

(See Figure 4–4 on page 49)

SLC_ERR_PORT_RECV_BCC

Counted as rcv_bcc errors.

SLC_ERR_PORT_RECV_FRAME_TOO_LONG

Counted as rcv_frame_too_long errors.

SLC_ERR_PORT_RECV_OVERRUN

Counted as rcv_overrun errors.

SLC_ERR_PORT_RECV_PARITY

Counted as rcv_parity errors.

SLC_ERR_PORT_RECV_DLE

Counted as rcv_unexpected_dle errors.

SLC_ERR_PORT_RECV_ETB

Counted as rcv_unexpected_etb errors.

SLC_ERR_PORT_RECV_SYN

Counted as rcv_unexpected_syn errors.

Table 6–6: Error Codes Reported in the iICPStatus Field (Cont’d)