Private Data Network Routing (pdnrout)
--------------------------------------

 Charter
 Last Modified: 04/07/1998

 Current Status: Concluded Working Group

 Chair(s):
     CH Rokitansky  <roki@isi.edu>

 Routing Area Director(s):
     Bill Fenner  <fenner@research.att.com>
     Alex Zinin  <zinin@psg.com>

 Routing Area Advisor:
        <0>

 Mailing Lists: 
     General Discussion:pdn-wg@bbn.com
     To Subscribe:      pdn-request@bbn.com
     Archive:           

Description of Working Group:

The DoD INTERNET TCP/IP protocol suite has developed into a de facto
industry standard for heterogenous packet switching computer networks.
In the US, several hundreds of INTERNET networks are connected
together; however the situation is completely different in Europe.

\vspace{.15in}
The only network which could be used as a backbone to allow
interoperation between the many local area networks in Europe, now
subscribing to the DoD INTERNET TCP/IP protocol suite, would be the
system of Public Data Networks (PDN). However, so far, no algorithms
have been provided to dynamically route INTERNET datagrams through
X.25 public data networks.  Therefore, the goals of the Public Data
Network Routing Working Group are the development, definition and
specification of required routing and gateway algorithms for an
improved routing of INTERNET datagrams through the system of X.25
Public Data Networks (PDN) to allow worldwide interoperation between
TCP/IP networks in various countries.  In addition, the application
and/or modification of the developed algorithms to interconnect local
TCP/IP networks via ISDN (Integrated Services Digital Network) will be
considered.

 Goals and Milestones:

   Done         Specification of an X.25 Call Setup and Charging 
                Determination Protocol. 

   Done         Specification of an X.25 Access and Forwarding Control 
                Scheme. 

   Done         Specification of routing metrics taking X.25 charges into 
                account. 

   Done         Specification of an X.121 Address resolution protocol. 

   Done         Consideration of INTERNET Route Servers. 

   Done         Development of Internetwork Management Protocols for 
                worldwide cooperation and coordination of network control 
                and network information centers. 

   Done         Provide a testbed for worldwide interoperability between 
                local TCP/IP networks via the system of X.25 public data 
                networks (PDN). 

   Done         Development of hierarchical VAN-gateway algorithms for 
                worldwide INTERNET network reachability information 
                exchange between VAN-gateways. 

   Done         Implementation of the required algorithms and protocols in 
                a VAN-Box. 

   Done         Assignment of INTERNET/PDN-cluster network numbers to 
                national public data networks. (Mapping between INTERNET 
                network numbers and X.121 Data Network Identification Codes 
                (DNICs)). 

   Done         Application of the INTERNET Cluster Addressing Scheme to 
                Public Data Networks. 

   Done         Interoperability between ISO/OSI hosts on TCP/IP networks 
                through PDN. 

   Done         Interoperability between local TCP/IP networks via ISDN. 

   Done         Definition of the PDN-cluster addressing scheme as an 
                Internet standard. 

   Done         Delayed TCP/IP header compression by VAN-gateways and 
                PDN-hosts. 

   Done         Assignment of INTERNET/PDN-cluster addresses to PDN-hosts 
                and VAN-gateways according to the developed hierarchical 
                VAN-gateway algorithms. 


 Internet-Drafts:

  No Current Internet-Drafts.

 Request For Comments:

  None to date.