network unreachable


Aydin Edguer (mandrill!edguer@tut.cis.ohio-state.edu)
12 Jun 88 04:45:12 GMT


I am trying to understand why certain sites are unreachable from my machine.
Background:
 I am currently at mandrill.ces.cwru.edu [129.22.16.1]. CASE.Edu used to be
 a CSNET site only, hooked up to relay-csnet via a leased line. It has since
 become a part of the NSFnet with T-1(?) links to Pittsburgh and Columbus.
 It was renamed CWRU.Edu. Since joining the Internet I have enjoyed using
 {smtp,nntp,ftp} to obtain information and sources. Recently, however, a
 number of sites which were reachable now return the message "network
 unreachable". These sites include such places as purdue.edu, uunet.uu.net,
 and decwrl.dec.com.
Question(s):
 Why would sites which were reachable become unreachable like this?
 Is this due (perhaps) to the dismantling of the ARPAnet which I understand
 is taking place?
 What can I do to find out why they have become unreachable?
 What can I do to try to reach them now that my router has given up?

Aydin Edguer INTERNET: edguer@mandrill.ces.cwru.edu
+1 216 368 3195 (w) UUCP: {att,cbosgd,decvax,sun}!mandrill!edguer



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