Say there is ISP-Alice (ISP-A) and ISP-Bob (ISP-B). They both serve neighboring areas, but they currently only peer with ISP-Charlie. They want to change that and peer directly with each other to speed up service.
Given this situation I would like to know the steps ISP-A and ISP-B would take to peer with each other. Specifically:
- Is dedicate fiber normally used to connect their data centers or do they leverage fiber that is already servicing customers at the perimeter?
- Once the PHY path is established, how does each start sending BGP advertisements through the Path?
- Assuming they are using IP; how did they set up the initial IP addresses? Are those initial IP addresses public or just meant to talk between them (some /31 p2p connection?)?
- Can the customer equipment see any of these advertisements?