Cisco Catalyst 2960 Series, Configuration Manual

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Description Variable
The pass-through POSIX error code (9 bits = 512
values). This represents the last of the 32-bit
sequence, and the string corresponding to this error
code is contained in $_cerr_posix_err. PPPPPPPP
Error Class Encodings for XY
The first variable, XY, references the possible error class encodings shown in the table below.
Table 170: Error Class Encodings
CERR_CLASS_SUCCESS 00
CERR_CLASS_INFO 01
CERR_CLASS_WARNING 10
CERR_CLASS_FATAL 11
An error return value of zero means SUCCESS.
SUMMARY STEPS
1.
enable
2.
show event manager policy available detailed policy-filename
3. Cut and paste the contents of the sample policy displayed on the screen to a text editor.
4. Define the required
event_register
Tcl command extension.
5. Add the appropriate namespace under the ::cisco hierarchy.
6.
Program the must defines section to check for each environment variable that is used in this policy.
7. Program the body of the script.
8.
Check the entry status to determine if a policy has previously run for this event.
9. Check the exit status to determine whether or not to apply the default action for this event, if a default
action exists.
10.
Set Cisco Error Number (_cerrno) Tcl global variables.
11. Save the Tcl script with a new filename, and copy the Tcl script to the device.
12.
configure terminal
13. event manager directory user { library path | policy path }
14. event manager policy policy-filename [ type { system | user }] [ trap ]
15. Cause the policy to execute, and observe the policy.
16. Use debugging techniques if the policy does not execute correctly.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
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How to Write Embedded Event Manager Policies Using Tcl