Installation Guide

Brocade MLX Series and Brocade NetIron XMR Installation Guide 219
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Managing the device
Static and dynamic buffers
The software provides a static buffer and a dynamic buffer:
• Static – logs power supply failures, fan failures, and temperature warning or shutdown messages
• Dynamic – logs all other message types. In previous releases, power supply messages were displayed in static logs only, with
only the last event logged. Beginning with release 03.8.00, power supply messages are displayed in both static and dynamic
logs.
In the static log, new messages replace older ones, so only the most recent message is displayed. For example, only the most recent
temperature warning message will be present in the log. If multiple temperature warning messages are sent to the log, the latest one
replaces the previous one. The static buffer is not configurable.
The message types that appear in the static buffer do not appear in the dynamic buffer. The dynamic buffer contains up to the maximum
number of messages configured for the buffer (50 by default), then begins removing the oldest messages (at the bottom of the log) to
make room for new ones.
The static and dynamic buffers are both displayed when you enter the show logging command.
Brocade(config)# show logging
...
Static Log Buffer:
Aug 27 12:42:42:A:Power Supply 6, 1st right, failed
Dynamic Log Buffer (50 lines):
Aug 27 12:19:04:I:Interface ethernet3/4, state up
Aug 27 12:19:04:I:Interface ethernet6/3, state up
Aug 27 12:19:04:I:Interface ethernet3/2, state up
Aug 27 12:19:04:I:Interface ethernet6/1, state up
Aug 27 12:19:00:N:Module up in slot 6
Aug 27 12:19:00:N:Module up in slot 3
Aug 27 12:18:43:I:Warm start
When you clear log entries, you can selectively clear the either buffer, or you can clear both. For example, to clear only the dynamic buffer,
enter the clear logging command at the Privileged EXEC level.
Brocade# clear logging dynamic-buffer
TABLE 33 Syslog buffer configuration
Field Description
Syslog logging The state (enabled or disabled) of the Syslog buffer.
messages dropped The number of Syslog messages dropped due to user-configured filters. By default, the
software logs messages for all Syslog levels. You can disable individual Syslog levels, in
which case the software filters out messages at those levels. Each time the software
filters out a Syslog message, this counter is incremented.
flushes The number of times the Syslog buffer has been cleared by the clear logging command.
For information about clearing the Syslog buffer, refer to “Static and dynamic buffers” on
page 219.
overruns The number of times the dynamic log buffer has filled up and been cleared to hold new
entries. For example, if the buffer is set for 100 entries, the 101st entry causes an
overrun. After that, the 201st entry causes a second overrun.
level The message levels that are enabled. Each letter represents a message type and is
identified by the key (level code) below the value. If you disable logging of a message
level, the code for that level is not listed.
messages logged The total number of messages that have been logged since the software was loaded.
level code The message levels represented by the one-letter codes.