[SunHELP] solaris 8 problem ....

[Adrian Florea]

Anyway I looked into /etc/nsswitch.conf file and there is specified:

files nis [UNAVAIL=continue NOTFOUND=continue]

so why the system doesn't resolve that names from /etc/hosts file ?

Adrian.



On Thu, 13 Jun 2002, Kurt Huhn wrote:

> > > I'm facing a strange problem:
> > >
> > > -one machine ultra10/NIS client/Solaris8
> > > -when ethernet cable is disconnected the machine blocks/hangs very bad,
> > > the ping program does not says the classical answer (no response from ...)
> > > when I ping hosts by name, only when I ping hosts by IP.
> > >
> > > Even if I try to see processes on the system with ps, it is blocked.
> > >
> > > If have some knowledge of such a problem please let me know,
>
> The problem is name resolution.  If you try to ping a system by IP, the
> remote system is easily accessable with no further translation needed.
> If you try to ping a system by name (wheter using DNS or NIS for
> resolution) the system needs to find the IP address of the remote system
> before it can try to ping it.
>
> Now, if you disconnect the ethernet cable and try to ping by name, your
> system will be unable to find the IP address of the remote system.  It
> may sit there for a very long time attempting to find the name of the
> remote system.  If it can't find the name, it may sit there
> indefinitely, waiting for the information it wants.  That's because,
> while the OS may know the cable is unplugged, it doesn't pass that info
> along to name resolution applications - so routines like gethostbyname
> that are called by ping and other apps won't be able get the info they
> want, and they may go into endless loops trying to find the name of the
> remote system.
>
> With the ethernet cable unplugged, you won't be able to ping anything
> anyway.  Is there a deeper problem you're trying to solve?  I'm not sure
> what the desired result is...
> --
> Kurt
> kurt at k-huhn.com
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