BLARSON@USC-ECLB.ARPA.UUCP (06/06/86)
I frequently have problems trying to get files from cu20b.columbia.edu using ftp from either usc-eclb.arpa (milnet) or usc-oberon.arpa (arpanet). Tops-20 ftp (usc-eclb.arpa) gives the message "connection rejected for unknown reason" and 4.2bsd ftp (usc-oberon.arpa) gives the message "network unreachable". (This is the second night in a row this week, and I have had similar problems before.) I have also had many mail messages returned with "system unreachable" after three days through both usc-ecl.arpa (milnet) and usc-eclc.arpa. (arpanet) (both Tops-20) Apparently cu20b.columbia.edu (also a tops-20 machine) has no problems sending mail to us, we get the info-kermit digest regularly. Neither the local postmaster or the info-kermit people seem to know a reason for this problem. Where is the proper place to report this type of problem? Are other people experiencing it to? Mail can be gotten through by routing via other systems. (I used to use columbia.arpa, but it no longer understands the % hack and I haven't figured out out to specify an @host1:user@host2 address to tops-20 mm.) For ftp, I just keep trying until it decides to work. Bob Larson <Blarson@Usc-Ecl.Arpa> -------
melohn%sluggo@SUN.COM (Bill Melohn) (06/06/86)
Chances are good that the network which cu20b is on has fallen out of the limited size EGP reachablity table that you (or more likely your core gateway) use. This appears to happen to our non-backbone network every once in a while. The solution is to get more powerful core gateways that implement EGP and provide more space for the ever increasing numbers of non-backbone internet networks. If access to cu20b is really important to your site, you might consider adding the entry for the columbia gateway to ECLx's INTERNET.GATEWAYS file. That way you will not have to ask your core gateway how to get to cu20b. Bill