Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!ucbvax!BBN.COM!malis From: malis@BBN.COM (Andy Malis) Newsgroups: comp.protocols.tcp-ip Subject: Re: Goofy Router? Message-ID: <9104162048.AA11960@ucbvax.Berkeley.EDU> Date: 16 Apr 91 13:41:26 GMT References: <1324.28042ba5@sleepy.bmd.trw.com> Sender: usenet@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 58 Bryan, > we're oz.bmd.trw.com (129.193.100.6) and we're trying to get to > afsc-bmo.af.mil (132.62.71.1) afsc-bmo.af.mil (actually 131.62.7.1) is an Air Force host at Norton Air Force base, behind an Air Force Concentrator (Cisgo gateway) connected to the MILNET. The Concentrator is norton-piv-1.af.mil, with addresses 26.8.0.39 and 131.62.0.1. > When I did a traceroute to afsc-bmo.af.mil on 4/10/91 I got this - > 1 outdsg.nba.TRW.COM > . > . > . > 13 192.52.195.1 > 14 * * * > 15 * * * > . > . > . > 30 * * * As of 09:30 EDT on 4/16, it appears that norton-piv-1.af.mil is dead. I'm able to ping 26.0.0.39 (another host on the same MILNET PSN), but 26.8.0.39 isn't answering. When trying a traceroute from BBN to afsc-bmo.af.mil, the NSFNET reports that the destination network is unreachable: 7 princeton-nss.near.net (192.80.80.1) 40 ms !N 40 ms !N 20 ms !N I also tried a traceroute via your host, by using "traceroute -g oz.bmd.trw.com afsc-bmo.af.mil", and found a router at TRW was reporting host unreachable: 20 129.193.76.252 (129.193.76.252) 340 ms !H * 400 ms !H > What is this router at 192.52.195.1 doing? When I > traceroute just to 192.52.195.1 I got this - > 14 192.52.195.1 (192.52.195.1) 1060 ms !P 1020 ms !P 1050 ms !P 192.52.195.1 is MOFFETT-FLD-MB.DDN.MIL, a Mailbridge between the NSFNET (and several other nets) and the MILNET. It is responding to traceroute by reporting that it is receiving datagrams using an unsupported protocol (the !P flag). You should read the traceroute man page for more information on how it works, and other indications you can receive from traceroute. In general, if you are having trouble reaching a host on the MILNET, or on a network behind a MILNET-attached router, such as an Air Force Concentrator, you should call the MILNET Monitoring Center at (800) 451-7413, or (202) 692-5726. They are also reachable by email at DCA-MMC@DCA-EMS.DCA.MIL. Regards, Andy Malis BBN Communications