Brocade MLX Series and Brocade NetIron XMR Diagnostic Guide ...

Using Diagnostic CommandsChapter1How to use debug commandsThis chapter describes how to use Brocade diagnostic debug commands to monitor andtroubleshoot the Brocade NetIron XMR and Brocade MLX series device configurations. Debugcommands are accessible from the Privileged EXEC mode in the Multi-Service IronWare commandline interface (CLI). Most debug commands can be configured to send output to a destination thatyou specify.When enabled, debug commands can noticeably affect system performance. Many debugcommands are specifically designed to be used in conjunction with calls to Brocade TechnicalSupport. If you report a problem, the support engineer may ask you to execute one or more of thedebug commands described in this guide.ATTENTIONSome debug commands report information about internal hardware settings and registers that arerelevant primarily to the Brocade engineering staff. These commands are not described in thisdocument.Show commandsShow commands provide information that is extremely helpful for troubleshooting. For most of theenvironments discussed in this document, related show commands, show command output, andoutput descriptions are included.Many debug commands work in conjunction with show commands to generate output for a specificconfiguration.show logSyntax: show logThe show log command allows you to view the system log or traps logged on an SNMP trap receiver.Command output similar to the following is displayed. This output indicates that one switchoverfrom standby to active has occurred.Brocade# show logSyslog logging: enabled (0 messages dropped, 0 flushes, 0 overruns)Buffer logging: level ACDMEINW, 24 messages loggedlevel code: A=alert C=critical D=debugging M=emergency E=errorI=informational N=notification W=warningStatic Log Buffer:Sep 28 11:31:25:A:Power Supply 1, 1st left, not installedSep 28 11:31:25:A:Power Supply 3, middle left, not installedSep 28 11:31:25:A:Power Supply 4, middle right, failedSep 28 11:31:25:A:Power Supply 5, 2nd right, not installedDynamic Log Buffer (50 lines):Sep 27 18:06:58:I:Interface ethernet6/2, state upBrocade MLX Series and Brocade NetIron XMR Diagnostic Guide 153-1002426-02