appeared to be telnet/ssh problem ...

[ran_li]

Hello,

Have this situation need a clue to start troubleshoot.

hpux11.11, ping this host seems to be fine, system always on the line, however, telnet and ssh occasionally do not work hence could not login as any user once in a while or current telnet/ssh session will be disconnected.

/etc/service is good
/usr/sbin/inetd is running (restarted, but still the same)
syslog does not say anything about it.

please see if can help, appreciate.

[Steven E. Protter · Accepted solution]

Shalom ran_li,

Possible issues(not in any order):

* Possible network problem.
* Possibly another machine is coming up trying to use the same IP address of the target host.
* Patching issues.

Suggestions:
traceroute or ping to the machine, or shut it off when this happens and ping its IP. If you get an answer, see network administration.

inetd -l # turns on enhanced logging
tail -f /var/adm/syslog/syslog.log

Monitor and look for messages, there is probably something there.

At the console, run lanscan and then linkloop against the mac address of the external card to see if there is a problem.

Check cabling and ports and switches. Switchport settings can cause problems. You need to make sure 100 BaseT cards are configured Manual 100 BT full duplex on cisco switches. 1000BaseT cards must be auto negotiate.

run hardware diags on the nic with mstm,cstm or xstm exercize functions.

SEP

[ran_li]

Thanks for the input. It was the network problem, some host else uses the same IP. I shutdown the host and still can ping that IP address.

Appreciated!