The global routing table contains all prefixes reachable on the internet.
Current size (as of ):
- Over IPv prefixes
- Over IPv prefixes
- Growing roughly % per year
Who carries full tables?
- Transit providers
- Large content networks
- Internet exchange points
Alternatives:
- Partial tables (customer routes plus default)
- Default route only
Memory requirements: A full table needs several GB of RAM. Table growth is a long-term scaling concern.