EXFO FTB-860, User Manual

Page: 352 / 409

Common Test Setup, Results, and Functions
340
FTB-860/880
Alarms/Errors (Packet Sync Applications)
IP/UDP
The following errors are available with 1588 PTP test application.

IP Chksum
(IP Checksum) indicates that the IP datagrams received
have invalid IP header checksum.

UDP Chksum
(UDP Checksum) indicates that the UDP segments
received have invalid UDP checksum.
PTP
The following alarms are available with 1588 PTP test application.

Loss Sync
alarm indicates that the Slave Clock does not receive packet
timing signal messages (Sync, Follow Up, Delay Resp) within their
expected arrival time for a duration exceeding the configured
Receipt
Timeout (refer to PTP Alarm Timeout/Threshold on page 188).

Loss Announce
alarm indicates that the Slave Clock does not receive
Announce messages within their expected arrival time for a duration
exceeding the configured
Receipt Timeout
(refer to
PTP Alarm
Timeout/Threshold on page 188).

Unusable
alarm indicates that either the maximum Sync IPDV value or
the maximum Delay Req IPDV value in the last second exceeds the
configured
IPDV Threshold
(refer to
PTP Alarm Timeout/Threshold
on
page 188).

QL Mismatch
alarm indicates that the received QL value does not
match the Expected QL (refer to page 188 or page 197). The
QL Mismatch
alarm is only reported when at least one Announce
message has already been received ( Last QL Received ) and that the
QL Mismatch Monitoring
check box is selected.