Extreme Networks ExtremeWare 7.7, Справочник по командам

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792 ExtremeWare 7.7 Command Reference Guide
Commands for Status Monitoring and Statistics
• Component, Subcomponent, and Condition Name—describes the subsystem in the software that
generates the event. This provides a good indication of where a fault might lie.
• Message—a description of the event occurrence. If the event was caused by a user, the user name is
also provided.
This command displays the messages stored in either the internal memory buffer or in NVRAM. The
messages shown can be limited by specifying a severity level, a time range, or a match expression.
Messages stored in the target have already been filtered as events occurred, and specifying a severity or
match expression on the
show log
command can only further limit the messages shown.
If the
messages
keyword is not present, the messages stored in the memory-buffer target are displayed.
Otherwise, the messages stored in the specified target are displayed.
If the
only
keyword is present following the severity value, then only the events at that exact severity
are included. Without the
only
keyword, events at that severity or more urgent are displayed. For
example, severity
warning
implies critical, error, or warning, whereas severity
warning only
implies
only warning.
Messages whose timestamps are equal or later than the starting time and are equal or earlier than the
specified ending time will be shown if they also pass the severity requirements and match expression, if
specified.
If the format phrase is specified, this format overrides the format already configured for the specified
log. See the command
configure log target format
on page 696 for more information on specifying
a format.
If a
match
phrase is specified, the formatted message must match the simple regular expression
specified by
match-expression
for it to be shown.
A simple regular expression is a string of single characters including the dot character (.), which are
optionally combined with quantifiers and constraints. A dot matches any single character while other
characters match only themselves (case is significant). Quantifiers include the star character (*) that
matches zero or more occurrences of the immediately preceding character or dot. Constraints include
the caret character (^) that matches at the beginning of a message, and the currency character ($) that
matches at the end of a message. Bracket expressions are not supported. There are a number of sources
available on the Internet and in various language references describing the operation of regular
expressions.
If the
chronological
keyword is specified, messages are shown from oldest to newest; otherwise,
messages are displayed newest to oldest.
Severity Level. The severity levels are
critical
,
error
,
warning
,
notice
, and
info
, plus three
severity levels for extended debugging,
debug-summary
,
debug-verbose
, and
debug-data
. In log
messages, the severity levels are shown by four letter abbreviations. The abbreviated forms are:
• Critical—Crit
• Error—Erro
• Warning—Warn
• Notice—Noti
• Info—Info
• Debug-Summary—Summ
• Debug-Verbose—Verb
• Debug-Data—Data