1. An Internet Without IP Minaxi Gupta Computer Science Dept. Indiana University, Bloomington

2. State of affairs We are running out of IP addresses Routing scalability is in danger Address fragmentation Multi-homing Traffic engineering Routers fail to aggregate aggregatable addresses

3. Lets examine identifiers Hosts have two: names and IPs Domains have two: prefixes and ASNs What if we picked one for each? Which ones? Users rely on names

4. What if hosts only had names? Host names eliminate address exhaustion concerns No need for name to IP address translation Can we route on host names?

5. Need a routing locator ASNs can act as route locators Need to translate host names to routing locators DNS can perform the mapping

6. Outcome ASNs are an order of magnitude fewer => faster packet forwarding No need for longest prefix match What about ASN growth? Multi-homing does not require organizations to acquire ASNs Traffic engineering does not cause routing table growth