To better clarify which Autonomous Systems will be effected by the April 21, 1995 action, here is a list of the NSFNET Backbone Service nodes and the associated Autonomous Systems that will be disabled . These sessions will be disabled on April 21, 1995 at 0900 EDT. --Elise City ENSS# Associated AS# -------------------------------------------------------------------------------- Ann Arbor, MI 131 237 MICHnet 1225 CICnet Argonne, IL 130 683 Argonne 1225 CICnet Boston, MA 134 560 NEARnet 701 Alternet Boulder, CO 141 68 Los Alamos 278 MexNet 297 NASA 2648 NIST Champaign, IL 129 555 MSC 698 UIRnet 1225 CICnet College Park, MD (FIX-East) 145 293 ESnet 297 NASA 568 Milnet 668 DREN 2699 DSI 1800 ICM Houston, TX 139 114 Sesquinet 297 NASA 3354 THEnet Ithaca, NY 133 174 PSI/NYSERnet 133 gated testing Lincoln, NE 140 93 MIDnet Palo Alto, CA 128 199 BARRnet 200 BARRnet Pittsburgh, PA 132 204 PSCnet 1206 PSCnet Princeton, NJ 137 97 GES/Jvncnet 1250 Princeton Salt Lake City,UT 142 210 Westnet Seattle, WA 143 685 NorthWestNet 73 NorthWestNet San Diego, CA 135 195 SDSC 1740 CERFnet 1838 CERFnet 2150 CSUnet 22 NOSC NASA Ames, CA 144 200 BARRnet The following ASes will disable their sessions with the NSFNET Service and will reestablish it after a period of time. These ASes have advised us that the disabling of their sessions with the NSFNET between 0900 and 1000 EDT on April 21, 1995 will cause reachability and capacity problems. Champaign,IL 129 1224 NCSA 38 UIUC Pittsburgh,PA 132 3577 Prepnet College Park, MD 145 1800 ICM (FIX-East) Merit has started collecting routing table snapshots from the NSFNET Backbone Service and SNMP stats (in/out packets, in/out bytes), and will continue to do so throughout most of the day tomorrow. If there is a catastrophic failure tomorrow morning, Merit will advise the ANS NOC to roll back to the previous configuration (those installed Friday morning during the normal configuration window). If it is determined that problems are isolated to individual autonomous systems, Merit will enable the sessions with those individual autonomous systems. If there are individual routes from many sources which are unreachable, Merit will designate one emergency configuration time period at which all of the independent additions will be made. This time period will probably be late Friday or early Saturday. If you are experiencing problems tomorrow after 0900 EDT, please send mail to merit-ie@merit.edu, or trouble@ans.noc, or call 1-800-456-6300. Merit engineers will be on-call to address your problems. Thanks to all of you who have already ceased peering with AS 690, and to those of you who have worked so hard to meet the April 21, 1995 deadline. Hoping not to hear from you tomorrow. :-) --Elise