[NTLUG:Discuss] Is there a such 'low power standby' phenomenons?

[m m]

>From: Jared Cook <jaredmcook at yahoo.com>
>Reply-To: discuss at ntlug.org
>To: discuss at ntlug.org
>Subject: Re: [NTLUG:Discuss] Is there a such 'low power standby' 
>phenomenons?
>Date: Thu, 10 Jan 2002 20:21:24 -0800 (PST)
>
>
>--- m m <llliiilll at hotmail.com> wrote:
> >
> >
> >
> > >From: Mark Bickel <eusmb at exu.ericsson.se>
> > > > Is there a such 'low power standby'
> > phenomenons?
> > > > what happpen to my box is that If I let the box
> > idle for a while,
> > > > then nobody can conncet to my server, even ping
> > the box,
> > > > the server is kind of 'dead'.
> > > > but if I physically go back to 'use' the box
> > (any kind of use, edit a
> > >file,
> > > > telnet to some where...), the server become
> > alive, all the servers
> > > > works fine.
> > >
> > >I would look first at APM setings in the BIOS and
> > also if any apm services
> > >are running in the OS. Are any apm modules being
> > loaded or apm compiled in
> > >the
> > >kernel?
> >
> > I double checked:
> > There is no APM settings on the BIOS (disabled)
> > no amp modules was compiled in the kernel.
> > ampd is not rinning.
> >
> > still has this problem.
> >
> > any idea?
> >
> > thanks
> >
> >
> >
>I'm new here, but I'll be going to my first NTLUG
>meeting soon.
>
>Here's one from out in left field.  I had problems
>with ARP while using an LVS/IPVS cluster.  There are a
>lot of issues with virtual IPs and ARP addresses that
>I won't get into here, but the bottom line is I had to
>ping stuff in order to broadcast my ARP address
>because the router would add another MAC to it's table
>after a while.  {This might sound really strange, but
>in LVS, you have the members with the same virtual IP
>as the director, and if they are also responding to
>ARP requests your director is left out in the cold)
>I finally fixed it, but it was a nightmare trying to
>figure it out.
>
>My point is this, if you are on the other side of a
>router from the clients, your router may not have your
>ARP address for some odd reason.  Yes, it should be
>asking, but if another machine has the same IP, it
>could be responding to the ARP request first, or not
>responding at all for some reason.  This would explian
>why you had to telnet and ping arround for the others
>to get to you.
>
>So, in a nutshell, check to see if another machine has
>the same IP.
>
>Without more knowledge of your network topography it
>can be difficult to determine what the problem
>is.
>

my network topography is very simple and typical:

internet
  |
(eth0:public ip)
linux box
(eth1:private ip) -> other boxes(all internal ip)

There is only one public ip assigned on firewall box. the rest of them are 
use
non-routable ips.

again, All the boxes are APM disabled on BIOS (linux, windoz boxes), all 
liunx don't run ampd, the firewall box even don't have any APM related stuff 
in the kernel. and something interest is all the linux boxes will 'make' the 
monitor standby (power is on, but
screen is dark, nothing) after idle for a while, but the the windoz just 
stays on forever.

again, any other idea?

>Jared Cook
>
>
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