topic Re: Link down notification and logging in Operating System - HP-UX

Link down notification and logging

Adam Morris — Tue, 16 May 2006 13:50:53 GMT

Greetings,

I have a server running 11i which has had the switch connected to it fail a few times recently.

I checked the syslog output last time and nothing anywhere in it relates to the link going down. I've since told it to send everything of .notice or higher to one file so that I can check.

Is this normally logged somewhere? If so, where?

dmesg shows nothing, syslog is either configured to ignore it, or it isn't logged there.

Any ideas?

Re: Link down notification and logging

Tom Danzig — Tue, 16 May 2006 14:00:50 GMT

If the network tracing and logging daemon is running (which it should be), run:

netfmt -f /var/adm/nettl.LOG00 > /tmp/log

Look at the end of the output file for any clues. Netwwork disconnects should show up here.

dmesg should show these also.

Re: Link down notification and logging

Steven E. Protter — Tue, 16 May 2006 14:18:32 GMT

Shalom,

That is decidedly abnormal. If link is lost there should be syslog entries.

I do recall 11i v1 not being as twitchy as 11.00 but if link is lost the system should complain.

You can set this up in EMS with sam and have the system monitor the link. If its lost, you will get notice when it comes back up.

Not terribly helpful,but better than nothing.

SEP

Re: Link down notification and logging

Adam Morris — Tue, 16 May 2006 15:06:10 GMT

netfmt ... worked to show me the times it went down.

dmesg has been flooded by a user filling up /home (normally at 16% used)...

But syslog had nothing...

If it was writing to syslog does anyone know the standard facility and level that it would write at?

Thanks,

Adam

Re: Link down notification and logging

Chauhan Amit — Wed, 17 May 2006 00:27:36 GMT

Hi Adam,

Generally the Network related error messages are logged in "/var/adm/nettl.LOG000" .
But syslog also shows these messages wehn the Monitoring for the resource ("lan" in our case) is configured. I have seen in ServiceGuard setup , you do get "Subnet down" messages in syslog as well.

-Amit