I do not want to intrude into Paul's line of answering but after a short review of your configuration, these are two my suggestions:
Lower the DHCP lease time from 3 days you currently have to something considerably shorter, say, 30 minutes. Use the lease 0 0 30 command in your DHCP pool to accomplish this. This will allow for quicker reuse of your IP addresses.
Try using the spanning-tree portfast default global configuration command to declare all access ports as PortFast ports by default. This will allow the station to obtain its IP address more rapidly, without needing to wait over 30 seconds after it is first connected to a port.
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.