topic Re: telnet session limit in Operating System - OpenVMS

telnet session limit

wendling — Tue, 27 Sep 2005 04:27:30 GMT

Hello,
Openvms 6.2, ucx 4.2 eco4
We putted a telnet session limit of 300 ( ucx set service telnet /limit=300) but we still are limited to 200. Tcp/ip has be restarted.
Operator.log shows "ACP telnet request failed,
total service limit reached". Any idea ?

Thank's in advance.
Gérard.

Re: telnet session limit

Kris Clippeleyr — Tue, 27 Sep 2005 04:30:07 GMT

GÃ©rard,
Have you checked the system parameter IJOBLIM ?
Kris (aka Qkcl)

Re: telnet session limit

Wim Van den Wyngaert — Tue, 27 Sep 2005 04:41:10 GMT

Do ucx sho comm

and check for device_sockets (peak). This probably needs to be increased.

Wim

Re: telnet session limit

David B Sneddon — Tue, 27 Sep 2005 04:43:39 GMT

Gerard,

You may also want to check how many buffers are available
UCX SHOW COMM/MEM
and see if you are hitting some limit in there.

Another thing to look at is MAXPROCESSCNT in SYSGEN.
What is your current value (SHOW MEMORY/SLOT)?

Dave

Re: telnet session limit

wendling — Tue, 27 Sep 2005 04:52:14 GMT

Tank' all for those quick answers, nice to see such dynamic VMS forum.
IJOBLIM was at 250 putted 350, there are also some LAT connections ...
MAXPROCESSCNT is at 460, there where a max of 321 processes still last boot (100 days)
I will check the comm parameters ...
Gerard

Re: telnet session limit

Wim Van den Wyngaert — Tue, 27 Sep 2005 04:52:58 GMT

If it is dev_sockets you should get "process quota exceeded" when doing telnet from VMS.
But I didn't find any message in operator log.

Wim

Re: telnet session limit

Wim Van den Wyngaert — Tue, 27 Sep 2005 04:54:30 GMT

I wonder if your restart of TCP was done.
Try ucx disable servi telnet (will kill all session) followed by ucx ena servi telnet.
Just tried it and the new limit was accepted.

Wim