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Conference irocz::terminal_servers

Title:Terminal Servers
Notice:See Note 2 for Directory of important notes. Please use keywords.
Moderator:LAVC::CAHILLON
Created:Tue May 14 1991
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3547
Total number of notes:12300

3466.0. "lat connection not cleaned up" by UTRTSC::KNOPPERS (Oswald Knoppers) Fri Mar 14 1997 05:31

*********** crosposted in noted::lat *******************************

Hi,

An application (running on VAX/VMS V6.2) initiates connections (HIC) to a
number of ports on a DECserver 700-8 (V1.1a bl45). Four ports have a normal
modem connected and two have an ISDN modem.

This VMS system has two ethernet interfaces (qna and isa), on both ethernets
a lat link is created.

User dial in on thes modem and ISDN lines and are then using this application.
When the user is finished he disconnects the telephone or ISDN connection.

The application gets a hangup and will then reconnect to the decserver port.

For the normal modem lines this works fine. On the ISDN lines however, the
hangup is not received in the application. Latcp shows that the lta device is 
still connected, on the server however the port is idle. Also a latcp show
connection/full stll shows a VC to this DECserver with multiple sessions
including this one...

I can imagine that the modem signal timing is different on the ISDN modem but
I dont understand how it is possible that the terminal servers port state is
idle while VMS still thinks the lta device is connected.

Has anybody seen anything like this?

Regards,

Oswald
T.RTitleUserPersonal
Name
DateLines
3466.1analog vs. digital modemsLAVC::CAHILLJim CahillFri Mar 14 1997 13:5111
> User dial in on thes modem and ISDN lines and are then using this application.
> When the user is finished he disconnects the telephone or ISDN connection.

Analog modems tell the DECserver to log out the port by dropping DSR or
some other signal between the modem and the DECserver.

Are your ISDN modems capable of and configured to toggle the same signals
as their analog cousins?  Is MODEM CONTROL and DSRlogout enabled on the
DECserver ports?

Jim
3466.2I'll get the infoUTRTSC::KNOPPERSOswald KnoppersMon Mar 17 1997 02:319
Re .1

Unfortunally I don't have that information (yet), but I fail to see how it
is possible that VMS still thinks the port is connected while the port on
the server is idle.

Regards,

Oswald
3466.3still an issueUTRTSC::KNOPPERSOswald KnoppersTue May 27 1997 09:5713
It has been very quiet here... We will try to get a lan trace from this. In
the mean time I have verified that the server indeed thinks the port is
idle while on VMS the lta device is still connected.

I personally doubt if something is revealed in the lan trace... But we'll
see.

Anyway, does anybody has other ideas on how to troubleshoot this? Should we
force a dump of the server when it is in this state?

Regards,

Oswald