SYS-LINK (System Links)
Issue 4 May 2002
10-1599 555-233-123
Common procedure for repairing link problems
The state of a system link is dependent on the state of the various hardware
components that it travels over. To resolve any problems associated with a system
link, use the following procedure.
The switch maintains a list of hardware components over which the link travels
called the hardware path. There are two hardware paths, the current hardware
path and the faulted hardware path for each of the system links. The current
hardware path is present only for those links that are currently up. When a link is
down, the current hardware path is empty. The faulted hardware path, is always
present once the link has gone down and is not cleared when the link
subsequently recovers. The faulted path preserves the path that the link traversed
when it last went down. The time at which the faulted path was last recorded is
preserved and is accessible through the status sys-link location and list sys-link
commands. Therefore, the focus of attention for problems which do not involve a
link that is down, is the current hardware path. If the link is down, faulted hardware
path is the focus of attention.
The command status sys-link location will present the state of both the hardware
paths (current and faulted) along with the state of each of the components in the
hardware path. When analyzing any system link problem, look for alarms on the
components listed under desired hardware path. If any alarms are present, then
follow the maintenance procedures for the alarmed components to clear those
alarms first.
When all the components are alarm free, wait for 3 minutes to allow the links to
recover. Test the system link through test sys-link PCSSpp long clear and
notice any tests that fail. If any failures are found, fix the problems indicated by the
tests and repeat the procedure.
Error Log Entries and Test to Clear Values
Table 10-590. SYS-LINK Error Log Entries
Error
Type
Aux
Data Associated Test
Alarm
Level
On/Off
Board Test to Clear Value
13 (a) System Link Status
(985)
WARNING OFF
257 (b) WARNING OFF test sys-link PCSSpp l cl
513 (c) WARNING OFF test sys-link PCSSpp l cl
772 (d) WARNING OFF test sys-link PCSSpp l cl
1025 (e) WARNING OFF test sys-link PCSSpp l cl
1281 (f) WARNING OFF test sys-link PCSSpp l cl
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