User guide

Managing Your Canopy Network March 2005
Through Software Release 6.1
Issue 1 Page 377 of 425
Canopy System User Guide
− BHM to CMM
− power
◦ researching Event Logs of the involved equipment. (See Interpreting Messages
in the Event Log Page on Page 330.)
◦ 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.
31.3 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 Page on Page 330)
◦ 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, RSSI,
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?
31.4 SECONDARY STEPS
After preliminary fault isolation through the above steps
1. check the Canopy knowledge base to find whether other network operators have
encountered a similar problem.
2. proceed to any appropriate set of diagnostic steps. These are organized as
follows:
◦ Module Has Lost or Does Not Establish Connectivity
◦ NAT/DHCP-configured SM Has Lost or Does Not Establish Connectivity on
Page 379
◦ SM Does Not Register to an AP on Page 380
◦ BHS Does Not Register to a BHM on Page 381