When I was working one of the budget ISP in Australia, the CTO suggested to use mailing list for change control. Which is any change you made to the router need to send an email to email@example.com.
I was speaking to my friend yesterday. He told me that Cisco has a built-in scripting thing which can send out email automantically when the configuration is changed. It is more convenience than manually sending an email. And sometime, some people would try to cover their ass when they did the configuration wrong, they just said – “I have never tough the router configuration”. To eliminate this kind of people telling shXt, cisco EEM will do a better job in change control in my opinion.
Using Cisco EEM scirpt all changes will be sent out automantically with who did the changes. Below is the script that i have on my router.
event manager environment _Email_Server smtp.howardtang.com
event manager environment _Email_To firstname.lastname@example.org
event manager environment _Email_From RouterChange@howardtang.com
event manager applet mail_cfg_chg
event syslog pattern ".*%SYS-5-CONFIG_I.*"
action 1.0 info type routername
action 1.1 cli command "enable"
action 1.2 cli command "show archive log config all"
action 1.3 mail server "$_Email_Server" to "$_Email_To" from "$_Email_From" subject "Config change on router: $_info_routername" body "$_cli_result"
action 1.4 cli command "clear archive log config force"
Before adding the EEM script we need to enable log for configuration change on the router.
notify syslog contenttype plaintext
Each configuration change will be then send to the email address as soon as you exit the enable mode. You may do more research on google and you will find more useful EEM Script that written by others.