We have a huge network on fibre and copper, where there are a number of switches cascaded. One of the customer has connections to us as well as to another ISP. Now the problem is that one customer in another location is able to connect to the other ISP using our network. This is done by using the PPPoE protocol. The other ISP has a PPPoE server located at the first customer’s place. We want to block this PPPoE protocol in one of our D-Link or Cisco swithes. We are looking for help on how to block this protocol in any of these switches.
