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Re: LAT ports to modem has gone inactive

 
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Fredrik.eriksson
Valued Contributor

LAT ports to modem has gone inactive

Hi,
As I've posted earlier I'm quite the rookie at openvms, so I hope I can explains this properly :)

I have 8 LAT ports that should be connected to modems. But recently all but 3 has gone inactive. Restarting the modems doesn't solve anything and I can't seem to find a failure reason.

Is there anyway to reset the port or have it try to connect again?

I've tried the following to figure out why they all got disconnected, but it hasn't really given me anything solid.

VMS1>mc latcp show ports

Port Name Port Type Status Remote Target (Node/Port/Service)
--------- ----------- ------------- -----------------------------------------
_LTA5004: Application Inactive SERVER200-1/PORT_1/
_LTA5010: Application Inactive SERVER200-2/PORT_2/
_LTA5016: Application Inactive SERVER700-1/PORT_4/
_LTA5031: Application Inactive SERVER200-2/PORT_7/
_LTA5034: Application Inactive SERVER200-2/PORT_8/
_LTA5037: Application Active SERVER200-2/PORT_3/
_LTA5040: Application Active SERVER200-2/PORT_5/
_LTA5043: Application Active SERVER200-1/PORT_6/

VMS1>mc latcp show port lta5004/full

Local Port Name: _LTA5004: Local Port Type: Application (Queued)
Local Port State: Inactive
Connected Link:

Target Port Name: PORT_1 Actual Port Name:
Target Node Name: SERVER200-1 Actual Node Name:
Target Service Name: Actual Service Name:

VMS1>mc latcp show port LTA5004 /counters

Port Name: _LTA5004:

Seconds Since Zeroed: 9070820
Remote Accesses: 0 Framing Errors: 0
Local Accesses: 0 Parity Errors: 0
Bytes Transmitted: 0 Data Overruns: 0
Bytes Received: 0 Password Failures: 0
Solicitations Accepted: 0
Solicitations Rejected: 0
Incoming Solicits Accepted: 0
Incoming Solicits Rejected: 0
Last disconnect reason code: 0
(%LAT-F-LRJUNKNOWN, unknown)

Is it so easy that I just have to recreate them?

Best regards
Fredrik Eriksson
27 REPLIES 27
marsh_1
Honored Contributor

Re: LAT ports to modem has gone inactive

hi fredrik,

i take it these modems are connected via a decserver (200)? , if so have you logged on to the decserver to check the ports and their settings ? it sometimes helps if you log them out then check port with a mon port (port num) stat. has anything else changed recently ?
Fredrik.eriksson
Valued Contributor

Re: LAT ports to modem has gone inactive

Yes ofcourse, I should have mentioned that they're connected via 2 DECservers.

I haven't logged on to the decservers yet, because we're having abit of password trouble since the guy who set them up about 8-9 years ago has left and there aren't that many that was involved in it in the later years.

I was thinking that I should log on and see if I could see anything from there thou.

Nothing has changed regarding those. It started about 2 weeks ago when our application started acting up and lost processes and then they just stopped working.

There is something wierd on them thou. There's a led named "CD" on the modems that isn't active on the ones that aren't working. But figuring out what "CD" means by googling doesn't seem to be an easy task (obviously).

Best regards
Fredrik Eriksson
Volker Halle
Honored Contributor

Re: LAT ports to modem has gone inactive

Fredrik,

CD = Carrier Detect

this signal should be ON, if a working connection exists to the remote modem.

A LAT session being Active means, that a LAT connection exists betwwen your VMS system and the specified port on the DECserver.

Are these dial-in or dial-out modems ?

For Application LTA devices, you normally establish the LAT connection to the DECserver port by doing a WRITE IO to the LTAxx: device from the OpenVMS system or application. I would expect an application process as the owner process of those LTA devices, check with SHOW DEV/FULL LTA5040:

Are the inactive LTA devices owned as well ? Has their owner process disappeared ?

Volker.
Fredrik.eriksson
Valued Contributor

Re: LAT ports to modem has gone inactive

Hi Volker,

They are dial-out modems. Some of them is associated with sending faxes.

This is what i get from an active/inactive lat port.

The Active one:
VMS1>show dev /full lta5040:

Terminal LTA5040:, device type unknown, is online, record-oriented device,
carriage control, device is busy.

Error count 0 Operations completed 31143055
Owner process "TEXCOM_TFX_001" Owner UIC [SYSTEM]
Owner process ID 26C002A1 Dev Prot S:RWPL,O:RWPL,G,W
Reference count 1 Default buffer size

The Inactive one:
VMS1>show dev /full lta5004:

Terminal LTA5004:, device type unknown, is online, record-oriented device,
carriage control.

Error count 0 Operations completed 3
Owner process "" Owner UIC [SYSTEM]
Owner process ID 00000000 Dev Prot S:RWPL,O:RWPL,G,W:RW
Reference count 0 Default buffer size 80

You're correct that there is now owner process.

As a late addition. I've now found out that we have a decserver 700 that's also in the loop :P. Which I can't connect to obviously (just getting "no response from remote system"). The 5 modems that isn't responding properly seems to be connected to that decserver.

I'm guessing I'll have to go down to the datacenter and connect a terminal and see if there's something iffy with it.

Best regards
Fredrik Eriksson
Oswald Knoppers_1
Valued Contributor

Re: LAT ports to modem has gone inactive

You can try the command:

$ set host/dte lta5004:

And hit a few returns. This should setup the connection.
If you get an error (dataset hangup or something like that) then the lat software is unable to setup the connection.

You can also remotely login to the decsever with the command:

$ set host/mop/addr=08-00-2b-xx-xx-xx

Or using NCP connect (decnet IV).

Regards,

Oswald
Fredrik.eriksson
Valued Contributor

Re: LAT ports to modem has gone inactive

The modems just says data hangup and when I try to connect to the decserver it as follows:
VMS1> set host/mop/circuit=CSMACD-1/address=08-00-2B-BE-4E-74
%CCR-F-NORESP, no response from remote system
VMS1>set host/dte lta5004

%REM-I-TOQUIT, connection established

Press Ctrl/\ to quit, Ctrl/@ for command mode



%REM-E-PORTRXERR, port receive error
-SYSTEM-F-HANGUP, data set hang-up

%REM-S-END, control returned to node BASNG1
%SYSTEM-F-HANGUP, data set hang-up

Best regards
Fredrik Eriksson
Oswald Knoppers_1
Valued Contributor

Re: LAT ports to modem has gone inactive

Can you do a set host/mop to the decservers still working?

Also your remark about the CD led not on suggest that the decserver died.

Oswald
Fredrik.eriksson
Valued Contributor

Re: LAT ports to modem has gone inactive

Okey... I've figured something out now.

It has to be something with the DECserver700 because the other modems connected to my DECserver200's is working fine. I can connect to them via set host/dte and I can send ath and atz without any problems.

And the first 3 modems (named mtu_1, _2 and _3) is the ones that is working as they should.

_4 throu _8 thou is not doing as they should. They're just not giving me anything then throws me out (as i described in my previous post).

If I've understood it correctly _4 to _8 is connected to the DECServer700 and it's not responding to my set host/mop... So I'll take a look at them in the upcoming days and get back if there's something I can solve or need help with :)

Best regards
Fredrik Eriksson
Volker Halle
Honored Contributor

Re: LAT ports to modem has gone inactive

Fredrik,

look at your inital LATCP> SHOW PORT output.

There are 3 different Target Node names:

SERVER200-1
SERVER200-2
SERVER700-1

There are active LTA devices on both SERVER200-n nodes, so those DECserver-200s seem to work. There are some other LTA ports on those servers, that are NOT active.

Note that the LTA devices will also become in-active, if the host application process aborts or does not run.

Verify, that you can connect to the working DECservers with NCP CONNECT (or SET HOST/MOP). Then verify, that you CAN'T connect to the DECserver-700 - the MAC address is at the back of the actual hardware unit.

Volker.