Switch Is Not Failing Over; Switch Is Failing Over Too Frequently - Symbol WS5000 Troubleshooting Manual

1.4.1 Switch is Not Failing Over

Switch is not failing over (Hot Standby) as appropriate.
issue. Please verify the latest version of JRE is installed on your system.
Table 1.11 Switch is Not Failing Over Troubleshooting Notes
Possible Issues Suggestions to Correct
Primary and Standby
switches are not both
enabled
Primary and Standby
switches have mismatched
software versions
Primary and Standby
switches cannot
communicate with each
other
Other problems, as listed in
switch logs
MAC address configuration
issues
Conflicting addressing on
same network
Outdated version of JRE Ensure you are using JRE version 1.4.2-06 or above.

1.4.2 Switch is Failing Over Too Frequently

Switch failing over too frequently (flapping).
Table 1.12 Switch is Failing Over Too Frequently Troubleshooting Notes
Possible Issues Suggestions to Correct
Hold time setting is too low Adjust the hold time on both the Primary and the Standby from Service Mode CLI, as
One of the switches is
crashing
System status shows
issues
Table 1.11
Verify that the Primary and Secondary switches are Standby enabled and have the
correct MAC address configured for the correct Primary/Secondary switch.
Mismatch configurations are not allowed. Verify that the Primary and Secondary
switches have the same software versions running.
Use the show system command at the WS5000> prompt.
Verify that the Primary and Secondary switch are configured properly and attempt to
ping each switch (using the ping command) from each switch.
Review the local logs on the Standby switch.
Review the Syslog. The correct MAC address should be seen when checking the Syslog
heartbeat messages. Use the show syslog command.
If more than one Primary switch exists on the same network, then use MAC addresses
to configure.
Table 1.12 provides suggestions to troubleshoot this issue.
follows:
• Use the disable command:
SM-WS5000.(Cfg).StandBy> disable
• Adjust the holdtime. For example:
SM-WS5000.(Cfg).StandBy>set holdtime 15
• Use the enable command. For example:
SM-WS5000.(Cfg).StandBy> enable
Check the CPU usage. For example:
SM-WS5000>show sysstat
Verify that the switch is not crashing. Check system status. For example:
SM-WS5000>show sysstat
System Troubleshooting
provides suggestions to troubleshoot this
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