i would like to ask a question regarding deploying ISP networks.
I am a CCNA and CCNP certified graduate and i i have been presented with an opportunity to deploy an Entire ISP network based on Cisco technologies and i am going to intergrate the Cisco technologies (Routers,Switches and firewalls) with Motorola Canopy Broadband wireless technologies.
Now my design which i have already put to test,is as follow.
I have the clients network which will be publicly addressed. Then i have the Motorola Canopy Wireless Network ( work as a normal physical leased lines )which is the transit network between the clients public network and our Core NOC network which is on totally private block of addresses.Then i have the Outside networking pointing to our upstream providers on totally public addresses.
Is this implementation valid ,because it seems to be working fine and NAT is only done on the ASA 5510 only i a routed mode.
My worry is i see most ISP's i have worked with using public addresses on there T1 WAN links between them and there clients, but for me i have decided to use private addresses on the WAN links between our NOC Network and clients to route the public address we provide to our customers.
Is this design really valid.