User guide

Canopy System User Guide Secondary Steps
pmp-0229 (Mar 2013)
571
o BHM to BHS
o BHM to CMM
o power
• researching Event Logs of the involved equipment. (See Interpreting Messages in the Event
Log on Page 504.)
• answering the questions listed in the following section.
• reversing the last previous corrective attempt before proceeding to the next.
• performing only one corrective attempt at a time.
Questions to Help Isolate the Problem
When a problem occurs, attempt to answer the following questions:
1. What is the history of the problem?
◦ Have we changed something recently?
◦ Have we seen other symptoms before this?
2. How wide-spread is the symptom?
◦ Is the problem on only a single SM? (If so, focus on that SM.)
◦ Is the problem on multiple SMs? If so
− is the problem on one AP in the cluster? (If so, focus on that AP)
− is the problem on multiple, but not all, APs in the cluster? (If so, focus on
those APs)
− is the problem on all APs in the cluster? (If so, focus on the CMM and the
GPS signal.)
3. Based on data in the Event Log (described in Interpreting Messages in the Event
Log on Page 504)
◦ does the problem correlate to External Hard Resets with no WatchDog timers?
(If so, this indicates a loss of power. Correct your power problem.)
◦ is intermittent connectivity indicated? (If so, verify your configuration, power
level, jitter, cables and connections, and the speed duplex of both ends of the
link).
◦ does the problem correlate to loss-of-sync events?
4. Are connections made via shielded cables?
5. Does the GPS antenna have an unobstructed view of the entire horizon?
Secondary Steps
After preliminary fault isolation through the above steps