Exactly what version of DFM do you have? At what point does the application hang when you are clearing alerts? What makes you think it's hung?
As for alert lifetime, an alert will remain active so long as there is at least one underlying event that is active. Since new events can become part of an alert at anytime, an alert COULD potentially live forever.
Every time an event within an alert changes (or a new event is added), you will get an email about that alert (assuming you have alert notifications configured). In general, alert notifications are useless as they do not give you the real details about what is happening. Therefore, we typically recommend to customers to uncheck the alert options within their Notification Group, and only check the event options. This way, the emails will contain more useful information.
Manually cleared alerts will remain in the Alerts and Activities display for 30 minutes. After that, they can be found under Fault History for up to a month.
A lot of the major problems with the alerts and activities interface was fixed in LMS 3.0. It's now much more responsive, and less prone to errors. I'm not saying this will address your current issue, but it may help the usability to upgrade.
To disable notifications for alerts, go to Notification Services > Notification Groups, edit your notification group, and uncheck the boxes under Alert Severity and Alert Status. Only have boxes checked under Event Severity and Event status, and make sure you've selected the proper Event Set (assuming you configured one).
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.