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SYNC (Port-Network Synchronization)
Issue 1 June 2005 2171
● In a CSS configuration, replace the Switch Node Interface circuit pack connected to
the active Expansion Interface circuit pack in the master port network. Use list
fiber-link to determine the Switch Node Interface circuit pack that is connected to
the active Expansion Interface circuit pack in the master port network.
● If the problem persists and any slip errors remain, follow the procedures described in
the troubleshooting section above.
This error is cleared by a leaky bucket strategy, and takes one hour to clear the error
counter once it is alarmed. Therefore, it may take up to one hour to clear the alarm after the
problem is cleared.
i. Noise on the DS1 line can cause transient alarms on synchronization. Therefore, when a
sync problem occurs on Error Types 1, 257, or 513, a WRN alarm is first raised for 15 to 20
minutes before the alarm is upgraded to a MINOR or MAJOR alarm.
Table 772: Synchronization Error Log Entries
Error
Type
Aux
Data
Associated Test Alarm
Level
On/Off
Board
Test to Clear Value
0
1
1. Run the Short Test Sequence first. If all tests pass, run the Long Test Sequence. Refer to the appropriate
test description and follow the recommended procedures.
0 Any Any Any test synchronization
1 (a
) (g)AnyNone WRN
MIN (j)
2
2. This Error Type initially raises a Warning alarm. If this Error Type persists and alarms are not
downgraded on this MO due to the value of set options, then, after a period of time, a Minor or Major
alarm is raised.
OFF None
18 (b
)0disable sync WRN OFF enable sync
257 (c
)(g)AnyNone WRN
MIN (j)
2
OFF None
513 (d
)(g)AnyNone WRN
MAJ (j)
2
OFF None
769 (e
)None MAJ
WRN
3
3. Major alarms on this MO may be downgraded to Warning alarms based on the value used in set
options.
OFF None
1793
4
4. It can take up to one hour for these SYNC alarms to clear due to "leaky bucket" strategy.
0-50 None MAJ
WRN
OFF enable sync
2049 (f
)
4
0 None WRN OFF None
2305 (f
)
4
0 None WRN OFF None