We offer Internet access using a cisco 3845 which we configure NAT/DHCP, we have the following issues:
1. We sometime get IP conflict on the private side of the interface, we believe some customers using Linksys router must have set IP address on the WAN port of their Linksys router.
2. We also noticed some customers see other computers belonging to other customers in their Windows network setup.
How do I mitigate against these?
ip dhcp excluded-address 172.20.255.0 172.20.255.254
ip dhcp pool CTBusiness3
network 172.20.0.0 255.255.0.0
dns-server 18.104.22.168 22.214.171.124
ip address 198.X.X.X 255.255.255.192
no ip directed-broadcast
ip nbar protocol-discovery
ip nat outside
description Connect to WuseII6506 fa3/34 (VLAN 34 access port)$FW_INSIDE$
ip address 172.20.0.1 255.255.0.0
ip nat inside
ip route 0.0.0.0 0.0.0.0 XXXXXXXXX
its only solution is MPLS.
I would agree that MPLS would be the best answer. That way each customer would have their own connection in and would be invisible to other customers/users.