In article <H000006600031be3@MHS>, [log in to unmask] says:
>
>I've got a customer with a DTC problem which no one has been able to
>figure out yet.
>
>They have a pair of routers which are configured as bridges, and a
>DTC16iX on the other end. Everything was working fine, then they
>messed with the network on the DTC end. They now claim to have put
>everything back the way it was however.
>
>The DTC downloads fine from the 3000.
>
>TERMDSM says it is fine, status and everything looks good.
>
>Spooled and hot printers on the DTC work fine.
>
>Sessions can be started on the DTC ports with :STARTSESS and work.
>
>But, if a user hits <CR> on a logged-off terminal, they immediately
>get a "Cannot Establish Connection" error.
>
>Anyone have any bright ideas?
>
>G.
 
Hi Gavin:
 
I fought a similar problem last month at a customer site, and the culprit
turned-out to be a duplicate IP address that had been "accidently" typed
when the some configurations were re-entered to "put things back as before".
PING would work, but a connection would be refused (or similar inconsistent
symptoms).
 
Also, a "stub" or bad connection/termination in the wiring can
cause wierd directional effects between certain nodes (runts, retransmissions,
timeouts, etc.) Any EE text on Maxwell's theory of electromagnetic wave
propogation through transmission lines will offer full details .............
 
Winston