If you want to encrypt the data for security reasons then you want to run an IPSec VPN over the links and IPSec (with ESP) will provide the encryption. If you run the IPSec with GRE then you can run EIGRP over the tunnel and have the advantages of a dynamic routing protocol along with IPSec.
I would suggest that first you set up the GRE tunnel and get it working (configure the tunnel interface, specify the tunnel source, the tunnel destination, and put IP addresses on the tunnel interface). Then enable EIGRP to run over the tunnel (just put a network statement in EIGRP that incldes the IP subnet of the tunnel. The issue to watch out for here is to be sure that the tunnel source or destination are not advertised by EIGRP because that leads to a problem with recursion. Once you get the tunnel working ok with EIGRP then configure IPSec. In configuring the IPSec the access list for interesting traffic to be protected by IPSec is just to permit the GRE traffic.
I have configured this type of thing quite a few times and it works well.
There is a problem with this. In particular the EIGRP network statement for network 10.75.48.80 0.0.0.3 indicates that the tunnel destination might be advertised by EIGRP. The router needs to know how to get to the tunnel destination independent of the EIGRP. So I suggest that you remove network 10.75.48.80 0.0.0.3. You would want a network statement for 126.96.36.199/30 so that EIGRP will become active on the tunnel.
The router needs to know how to get to 10.75.48.81. If it will know that from a static route then the redistribute static under router EIGRP is problematic. You would need a distribute list or some other filter to prevent 10.75.48.80 0.0.0.3 from being redistributed into EIGRP.
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.