I recently purchased a cisco 871 for use at home with a cox business line.
For initial setup/testing I had connected it to a linksys router but it would not receive an ip address. After beating my head against the wall for an hour, I read somewhere that dhcp will not work with a non-routable ip address on the wan link.
So I went ahead and plugged into my cable modem, and was able to pull an ip address from cox.
The problem is that after a random period of time it would stop routing traffic out the wan interface. All routes still showed up as they should, and I did not touch the config. A release/renew dhcp would fix the problem for another random amount of time (would pull same address).
I then brought it into work with me, and it will not pull a routable ip address from our campus dhcp server. debug dhcp revealed the following error which I was initially getting when hooked into the linksys:
"unknown dhcp problem.. no allocation possible"
if I assign a static ip address on wan interface, everything works fine.
i have also tried this with a completely clean config file (other than ip address dhcp entry on wan interface) with the same results.
from a pc connected to my 871, i initiated a ping -t to the gateway router (cable modem). everything works fine initially. but then after a random period of time (anywhere from 5-10 minutes that I observed) the pings begin to fail.
if i then go to my 871 router and issue release dhcp and renew dhcp commands, the pings are then again successful for another random period of time.
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.