RFC 1621 Pip Near-term Architecture May 1994 Table of Contents 1. Pip Architecture Overview ................................... 4 1.1 Pip Architecture Characteristics ........................... 4 1.2 Components of the Pip Architecture ......................... 5 2. A Simple Example ............................................ 6 3. Pip Overview ................................................ 7 4. Pip Addressing .............................................. 9 4.1 Hierarchical Pip Addressing ................................ 9 4.1.1 Assignment of (Hierarchical) Pip Addresses ............... 12 4.1.2 Host Addressing .......................................... 14 4.2 CBT Style Multicast Addresses .............................. 15 4.3 Class D Style Multicast Addresses .......................... 16 4.4 Anycast Addressing ......................................... 16 5. Pip IDs ..................................................... 17 6. Use of DNS .................................................. 18 6.1 Information Held by DNS .................................... 19 6.2 Authoritative Queries in DNS ............................... 20 7. Type-of-Service (TOS) (or lack thereof) ..................... 21 8. Routing on (Hierarchical) Pip Addresses ..................... 22 8.1 Exiting a Private Domain ................................... 23 8.2 Intra-domain Networking .................................... 24 9. Pip Header Server ........................................... 25 9.1 Forming Pip Headers ........................................ 25 9.2 Pip Header Protocol (PHP) .................................. 27 9.3 Application Interface ...................................... 27 10. Routing Algorithms in Pip .................................. 28 10.1 Routing Information Filtering ............................. 29 11. Transition ................................................. 30 11.1 Justification for Pip Transition Scheme ................... 31 11.2 Architecture for Pip Transition Scheme .................... 31 11.3 Translation between Pip and IP packets .................... 33 11.4 Translating between PCMP and ICMP ......................... 34 11.5 Translating between IP and Pip Routing Information ........ 34 11.6 Old TCP and Application Binaries in Pip Hosts ............. 34 11.7 Translating between Pip Capable and non-Pip Capable DNS Servers ................................................... 35 Francis