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11-14-2005 06:16 AM
11-14-2005 06:16 AM
ucx socket elimination
I have conections a cluster via telnet.
if I lost my switch or hub(power outage) my users that connect via this switch, they lost the conection in all pc applications (internet, mail and emulator for connect vms kea!), but in to my system the user keep the same ip and comunication socket.
all users only are be able to connect twice (maxjobs=2), but after power outage the sesion not died. when the try connect again the system reject because the job is max limit.
Some one know if I need configure my ucx at moment I loss the network automacly the socket kill or telnet sesion kill completly..?
Thanks
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11-14-2005 01:30 PM
11-14-2005 01:30 PM
Re: ucx socket elimination
You can use keepalive to get rid of the disconnected telnet sessions.
Try the following.
UCX> set service telnet/proto=tcp=probe=xx
UCX> set service telnet/proto=tcp=drop=n
(xx and n are set depending on how soon you would like to have your disconnected sessions terminated.)
This can be used to shorten the time for the disconnected sessions to disappear.
Which version of UCX or TCP/IP services are you running?
There are fixes on different versions for dangling telnet sessions. So make sure you have the latest ECO kit for the version of TCP/IP you use.
Thanks and regards.
Michael
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11-15-2005 02:34 AM
11-15-2005 02:34 AM
Re: ucx socket elimination
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11-16-2005 12:07 AM
11-16-2005 12:07 AM
Re: ucx socket elimination
The suggestions from Michael and Sebastian both look good to me, and we actually began using Michael's before seeing it posted here--found it in the manuals first.
We modified an in house application to use socket keepalive, for similar situations where a link goes down and we need the socket closed at the other end.
So this just might take care of your problem, too. But if Sebastian's suggestion works for you, you may prefer it. After a connection is dropped, user will be able to re-connect to the virtual terminal and continue working.
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11-16-2005 01:37 AM
11-16-2005 01:37 AM
Re: ucx socket elimination
Im looking for a parameter to check or any idea and know if the network have gaps or any parameter in my ucx.
no errors in operator.log no errors in to dec event I set my security audit only for alarm logout and not have a lot information.
Thanks for all your time
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11-16-2005 11:48 AM
11-16-2005 11:48 AM
Re: ucx socket elimination
When you said your session is over 20 minutes, do you mean an idle session or a busy session?
You can try the following.
1. On one telnet session, start a continuous ping so that data is passing through the telnet session for display. See if this will be disconnected.
2. On another telnet session, just leave it idle and see if it is disconnected.
If only the idle session is disconnected and the process on OpenVMS is still there, then the disconnect was not done by UCX. It might be likely that there is a firewall between the UCX host and your telnet clients. If this is the case, the keepalive will also protect your idle telnet session being 'killed' by the firewall.
Thanks and regards.
Michael