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Additional Diagnostics Tools
System Impacts of Temperature Logging
The temperature logging feature does not impact the performance of the system, but temperature
logging causes one log entry during every hour of switch operation. To prevent the loss of important
log messages, Extreme Networks recommends the use of an external syslog server. For more
information about the use of an external syslog server, refer to
"Syslog Servers" on page
94.
Network Impact of Temperature Logging
There is no network impact due to temperature logging, because it is an internal log message option of
the switch.
Syslog Servers
Log information is critical not only to troubleshoot a failed system, but also to identify contributing
conditions that might lead to future failures. One major problem with internal switch logs is that only a
limited amount of memory can be allocated for logs. After 1,000 messages, the log wraps and the first
messages are lost. Normally, this is not an issue, but in case of failure, a failure might be recorded in the
log, but lost because subsequent messages cause the earlier, true cause of the failure to be purged.
Another important fact to consider when designing for effective recovery is that network device logs
might be lost after a catastrophic failure.
Syslog servers are an effective and inexpensive way to address both of the internal log capacity
limitation and the risk of loss in a catastrophic failure. Syslog servers receive and store log messages
from network devices. With the use of syslog servers, information remains intact after failure and no
buffer threshold will be reached, allowing administrators or Extreme Networks TAC representatives to
identify the triggering event in a failure. Syslog servers also offer the added advantage of integrated
tools to store, sort, scan, and issue alerts on configured error conditions. This capability enables greater
control of the networking environment, especially when planning for effective recovery.
Related Commands
enable syslog
disable syslog
configure syslog {add} <host name/ip> {: <udp-port>} [local0 ... local7] {<severity>}
configure syslog delete <host name/ip> {: <udp-port>} [local0 ... local7]
Enabling Logging to Remote Syslog Server Targets
To enable logging to a remote syslog server, use this command:
enable syslog
NOTE
The enable syslog command must be issued in order for messages to be sent to the configured remote
syslog server(s). Syslog is disabled by default.
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Advanced System Diagnostics and Troubleshooting Guide
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Table of Contents
Troubleshooting
