Example of the debug event manager tcl cli_library Command
This example uses the sample policy sl_intf_down.tcl. When triggered, sl_intf_down.tcl passes a configuration
command to the CLI through the CLI library. The command passed in below is show event manager
environment. This command is not a valid command in configuration mode. Without the debug command
enabled, the output is shown below:
00:00:57:sl_intf_down.tcl[0]:config_cmds are show eve man env
00:00:57:%SYS-5-CONFIG_I:Configured from console by vty0
Notice that with the output above the user would not know whether or not the command succeeded in the
CLI. With the debug event manager tcl cli_library command enabled, the user sees the following:
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : CTL : cli_open called.
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : OUT : nelson>
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : IN : nelson>enable
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : OUT : nelson#
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : IN : nelson#configure terminal
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : OUT : Enter configuration commands, one
per line. End with CNTL/Z.
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : OUT : nelson(config)#
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : IN : nelson(config)#show event manager
environment
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : OUT : ^
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : OUT : % Invalid input detected at '^'
marker.
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : OUT : nelson(config)#
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : IN : nelson(config)#end
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : OUT : nelson#
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : CTL : cli_close called.
01:17:07: sl_intf_down.tcl[0]: DEBUG(cli_lib) : IN : nelson#exit
01:17:07: sl_intf_down.tcl[0]: config_cmds are show event manager environment
01:17:07: %SYS-5-CONFIG_I: Configured from console by vty0
The output above shows that show event manager environment is an invalid command in configuration
mode. The IN keyword signifies all data passed in to the TTY through the CLI library. The OUT keyword
signifies all data read back from the TTY through the CLI library. The CTL keyword signifies helper functions
used in the CLI library. These helper functions are used to set up and remove connections to the CLI.
Debugging the SMTP Library
The SMTP library allows users to send e-mail messages to an SMTP e-mail server. An Embedded Event
Manager debug command has been provided for users of this library. The command to enable SMTP library
debugging is debug event manager tcl smtp_library. When enabled, this command displays all data that is
passed in and read back from the SMTP library routines. This data helps ensure users that the commands that
they are passing to the SMTP library are valid.
Example of the debug event manager tcl smtp_library Command
This example uses the sample policy tm_cli_cmd.tcl. When triggered, tm_cli_cmd.tcl runs the command show
event manager policy available system through the CLI library. The result is then mailed to a user through
the SMTP library. The output will help debug any issues related to using the SMTP library.
With the debug event manager tcl smtp_library command enabled, the users see the following on the
console:
00:39:46: tm_cli_cmd.tcl[0]: DEBUG(smtp_lib) : smtp_read : 220 XXXX.example.com ESMTP XXXX
1.1.0; Tue,
25 Jun 2002 14:20:39 -0700 (PDT)
00:39:46: tm_cli_cmd.tcl[0]: DEBUG(smtp_lib) : smtp_write : HELO XXXX.example.com
00:39:46: tm_cli_cmd.tcl[0]: DEBUG(smtp_lib) : smtp_read : 250 XXXX.example.com Hello
XXXX.example.com [XXXX],
pleased to meet you
00:39:46: tm_cli_cmd.tcl[0]: DEBUG(smtp_lib) : smtp_write : MAIL FROM:<XX@example.com>
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
1820
Configuration Examples for Writing Embedded Event Manager Policies Using Tcl
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