To: Regional, Midlevel and Federal Network Operators From: Mark Knopper Merit/NSFNET Internet Engineering Subject: ANS to CIX Interconnection Plan Hi. Enclosed is a note from ANS describing their plan for the CIX to ANS network interconnection. Please let me know if you have questions or comments. Mark --------Forwarded Message To: Mark Knopper <mak@merit.edu> From: Jordan Becker <becker@ans.net> Subject: ANS-CIX Interconnection Plan Mark, Here is a description of the routing and configuration plan for the CIX to ANS connection. Please forward this to regionals, midlevels, etc. as appropriate. Jordan ----------------------------------- During an upcoming T3 network router configuration update window, there will be about 94 new networks configured in the policy routing database to support the interconnection between ANS CO+RE and the CIX. A new ANSNET router, ENSS187 has been connected via a T1 link to the CIX router. This new ENSS (AS1957) peers via BGP with the CIX router (AS1280). Ethernet ------- T1 ------------ | --------| | cix |----------------| enss187 |-----| | | | ags+ | | | |-----| Cnss11| ------- ------------ | | | | |-------- 1280 BGP 1957 BGP 690 There will be initially 987 networks announced to the T3 system via the CIX (AS1280). Most of these networks have previously been configured in the policy routing database and are already announced to the NSFNET backbone service at other T3 ENSS nodes. About 94 of these networks are not already announced to the T3 system via other ENSS nodes and will be announced via AS1280 for the first time. All CIX networks announced via AS1280 will be considered as ANS CO+RE services (commercial restriction free). An ASCII text file listing of all ANS CO+RE announced network numbers, network names, AS numbers and available service provider information is maintained by ANS and may be retrieved via anonymous ftp from FTP.ANS.NET as /pub/info/co+re/core.nets or NIS.NSF.NET as /nsfnet/core.nets. Updates to this file will be made a few days prior to any configuration updates for the T3 backbone that involve the CIX (AS1280). One of the new networks originates in the former Soviet Union, and traffic between US Government sponsored networks and the former Soviet Union is prohibited at this time. Therefore accordingly, the ANSNET will not re-distribute or announce any routes to this network. Note that the 94 new networks will potentially be generating traffic which does not comply with the NSFNET Acceptable Use Policy. The new network numbers will be announced by the ANSNET to the peer networks that are both ANS CO+RE and CIX members. Those regionals or midlevels who are using default routing to point their traffic to the NSFNET backbone may wish to explicitly prohibit traffic between their users and these new networks if their internal policies require it. This may be done by either internal means (eg. informing users), or by filtering in routers operated by the midlevel network. Regionals may contact Merit to discuss other options for blocking this traffic if required.