topic Re: Telnet listener on Decserver in Operating System - OpenVMS

Telnet listener on Decserver

labadie_1 — Tue, 07 Feb 2006 04:46:44 GMT

Alpha Vms 6.2-1H3, DS90M.

I have some TNAxxx: ports created on a Decserver 90M.

When the Alpha crashes and reboots, the port can't be created
telnet/create host 2002 177
%TELNET-E-NOCRSES, Failed to create session
-SYSTEM-F-REJECT, connect to network object rejected

I have to reboot the DS90M in order to re-create the TNA, but not on all DS90M. I have not been able to spot a difference in configuration between the DS90M.

Any idea ?

DS90M> sh telnet listener 2002
Listener TCP-port: 2002 Listener Type: RAW TCP
Identification: Indicateur telnet
Ports: 2
Connections: Enabled
IP Address: 10.44.32.61

Local>

Re: Telnet listener on Decserver

Karl Rohwedder — Tue, 07 Feb 2006 05:05:36 GMT

Are all servers on the same software revision?

regards Kalle

Re: Telnet listener on Decserver

labadie_1 — Tue, 07 Feb 2006 05:13:26 GMT

the versions are puzzling, as the DS90M which needs reboot has BL29-52, like another one which works fine (no need to reboot the DS90M in order to create the TNA device).

Another DS90M which works has BL10C-40.

:-(

Re: Telnet listener on Decserver

Wim Van den Wyngaert — Tue, 07 Feb 2006 05:21:38 GMT

I don't find it directly in the help but is it possible that keepalive must be enabled for TCP ? Or is the (show server) setting applied ? As long as listenner has a connection, it will not accept new ones.

Wim (without much knowledge of tcp on decservers)

BTW : great wine, only 1 bottle left

Re: Telnet listener on Decserver

Karl Rohwedder — Tue, 07 Feb 2006 05:23:15 GMT

I meant the SW version, or servers are running e.g.:

Network Access SW 2.3A, BL47-60

A sample telnet port on the VAX looks like:
Remote: vuw03t.wob.vw.vwg:2006
TNA9314: BG296: Outgoing Local: vuw30:49169
Remote: vuw02t.wob.vw.vwg:2007
TELNET> sho dev 9314/fu
Device TNA7224:
Access port name: (none)
Characteristics: (none)
Connection attempts: 0 (tries)
Connection interval: 0 (seconds)
Connection timeout: 0 (seconds)
Data high limit: 512 (bytes at VCI port)
Data low limit: 256 (bytes at VCI port)
Idle interval: 0 (seconds)
Idle timeout: 0 (seconds)
Network device name: (not connected)
Protocol: undefined (raw)
Local address: (not available)
port:
Remote address: (not available)
port:
Service type: None

Re: Telnet listener on Decserver

labadie_1 — Tue, 07 Feb 2006 05:43:09 GMT

telnet > sh dev xxx/fu
is not available with ucx 4.2 Eco 4 :-(

the sw version is 2.2 for the DS90M working and the other not working, and 2.0 for another DS90M working.

Re: Telnet listener on Decserver

Wim Van den Wyngaert — Tue, 07 Feb 2006 05:56:50 GMT

on the decserver the default keepalive is 8 * 120 sec, so 16 minutes.
> show internet
should show the settings.

Wim

Re: Telnet listener on Decserver

labadie_1 — Tue, 07 Feb 2006 06:06:36 GMT

120 (keepalive timer), 8 (retry) on the 2 DS90M with SW 2.2, on the third one, sh internet does not show any parameter

show internet
State: Enabled
Internet Address: 10.64.32.61
Subnet Mask: 255.255.0.0

Local>

Re: Telnet listener on Decserver

Wim Van den Wyngaert — Tue, 07 Feb 2006 06:47:55 GMT

And did you already wait let say 20 minutes after the crash of the alpha before rebooting the decserver ? How long ?

Wim

Re: Telnet listener on Decserver

labadie_1 — Tue, 07 Feb 2006 07:21:43 GMT

I usually wait less than 10 minutes, when I can log in, I recreate the TNA devices.

I do not understand when I need to re-create the TNA devices only on one DS90M, not on the two others.

Re: Telnet listener on Decserver

Walter Miller_1 — Tue, 07 Feb 2006 13:02:48 GMT

If you have not already done so, check the port configurations on the servers and look for differences.

Local> show port 2

Also next time you get the error check the status of the port to see if there is still a connection showing on the port.

Local> show port 2 status

Look for Current Service, Current Node and Current Port.

Instead of rebooting the DS90M you might try logging out the port.

Local> set priv
Password>
Local> log port 2

Hope this helps.

Re: Telnet listener on Decserver

Kelly Cox — Tue, 07 Feb 2006 23:29:55 GMT

I agree with Walter Miller.
Just logout the port in question.

I have this happen at least once weekly at client sites where I have no control over the terminal servers. I just logout the port and recreate the telnet session from the VMS side.

I would need to find some old notes from long ago, but a DEC support person told me it was related to terminal server port not dropping the session when it lost communication. I don't remember how to change a 90M, but I would compare port settings on the ones that work and the ones that don't.

Re: Telnet listener on Decserver

Wim Van den Wyngaert — Wed, 08 Feb 2006 01:59:52 GMT

Release notes 2.3A in 1998 (found on cd)

It is possible, in some circumstances, for the Telnet connection to the remote console to be broken, without disconnecting the remote console session itself. In this situation, the remote console will be continually "in use", and unavailable until the access server is rebooted.

But that doesn't explain why 1 has the problem and 1 isn't. There is also mentioned a bug when memory is nearly full.

Wim

Re: Telnet listener on Decserver

labadie_1 — Wed, 08 Feb 2006 06:28:45 GMT

Local> sh port X
on both DS90M shows exactly the same characteristics, but
Local> sh port X status
shows one difference
the DS90M which reconnects smoothly has
input signals: RXD
while the "disturbing" DS90M has
input signals: DSR RXD

DSR means (I think) Data Set Ready, or something similar

thanks to all who replied, I am going to modify the setup (remove the DSR) and, will try to just logout (if this happens before :-)

Re: Telnet listener on Decserver

Volker Halle — Wed, 08 Feb 2006 07:10:43 GMT

Gerard,

DSR is an Input Signal - normally indicating that the pin in the RS232 cable has a signal applied by whatever is at the other end of the cable. Same with RXD, which is received data signal.

I don't think you can TURN OFF DSR from the DS90M side.

The fact that 'DSR' is set, may just indicate, that the TELNET connection had not been completely torn down, so a LOGOUT PORT may be needed and may turn off DSR.

Volker.

Re: Telnet listener on Decserver

labadie_1 — Wed, 08 Feb 2006 07:30:05 GMT

Ok Volker

So this means that it is not this difference that explains the different behavior :-(

Re: Telnet listener on Decserver

labadie_1 — Wed, 08 Feb 2006 09:00:16 GMT

In order to have a procedure that connects to a decserver, set priv, log port 2, as my vms node has 6.2-1h3, what should I do ?

telnet client accepting non interactive commands needs Vms 7.1
http://h18000.www1.hp.com/support/asktima/appl_tools/009E60A3-96F8B0E0-1C0186.html

tsm ?

any other way ?

Thanks

Re: Telnet listener on Decserver

Walter Miller_1 — Wed, 08 Feb 2006 09:12:56 GMT

One other place to look for differences.

Local> show port 2 telnet client

Check for input flow control and output flow control.

Re: Telnet listener on Decserver

Volker Halle — Wed, 08 Feb 2006 09:19:11 GMT

Gerard,

use TSM V6.1, it's on the Freeware V6.0 CD.

Volker.

Re: Telnet listener on Decserver

labadie_1 — Wed, 08 Feb 2006 09:40:12 GMT

Walter

sh port 2 telnet client gives exactly the same output :-(

Volker

I will install Tsm

thanks