Netgear XCM8810 Chassis Hardware Installation Guide - Page 389

NETGEAR 8800 Chassis Switch CLI Manual • Severity Level-indicates the urgency of a condition reported in the log. Table 11 describes the severity levels assigned to events. • 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 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 Chapter 8. Commands for Status Monitoring and Statistics | 389