I have read confusing reports that when using the command "backup interface" on a primary serial interface, the backup interface does not become active unless the primary interface experiences a loss of signal (layer-1). If only line protocol (layer-2) is down the back up link won't become active.
But, when I have been testing my potential config, backup interface command seems to work with only line protocal being down.
The problem shows up when using frame relay. If the PVC goes down, but the link to the frame switch is still up, traffic will continue to route over the frame relay path instead of the backup link path. I found that dialer-watch works much better in a frame relay environment with dial backup, but needs a routing protocol to trigger the dial backup.
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.