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Hi Carsten,
This is a fault. I have done this on many occasions with every type
of Juniper router and there is no reboot when you power on a second
power supply. You should be able to leave one power supply running,
replace a faulty unit and power on the replacement with no
interruption to service.
Regards,
Guy
> -----Original Message-----
> From: Strahler, Carsten [mailto:Carsten.Strahler@lambdanet.net]
> Sent: Thursday, December 13, 2001 3:42 PM
> To: 'Guy Davies'; Strahler, Carsten; Juniper-Nsp (E-Mail)
> Subject: AW: [j-nsp] Hot-plugable power-supplies in a M20 ?
>
>
> Hi,
>
> sorry for my imprecise reading of the manual. But it
> *reboots* after turning
> on the replaced PSU. We tested this on two M20s.
>
> Carsten
>
> > -----Ursprüngliche Nachricht-----
> > Von: Guy Davies [mailto:Guy.Davies@telindus.co.uk]
> > Gesendet: Donnerstag, 13. Dezember 2001 16:11
> > An: 'Strahler, Carsten'; Juniper-Nsp (E-Mail)
> > Betreff: RE: [j-nsp] Hot-plugable power-supplies in a M20 ?
> >
> >
> >
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> > Hi Carsten,
> >
> > No, there is no conflict. If you're going to replace a
> PSU, you must
> > switch off *that* PSU to disengage the interlock mechanism. You
> > can then remove the PSU and replace it with a working one.
> Obviously, if
> > that's your only PSU then you must power down the unit. But, if
> > you've got a second PSU, it will continue functioning while you
> > replace the faulty unit and, when installed, you can power it up
> > without any impact on the performance of the box.
> >
> > Turning on a power supply causes a router to boot if it is not
> > already booted. It doesn't cause it to *reboot*. If that were
> > the case, you'd get a double hit whenever you turned on a dual
> > PSU box (unless you flicked the switches on both PSUs at exactly
> > the same time).
> >
> > Regards,
> >
> > Guy
> >
> > > -----Original Message-----
> > > From: Strahler, Carsten [mailto:Carsten.Strahler@lambdanet.net]
> > > Sent: Thursday, December 13, 2001 3:03 PM
> > > To: Juniper-Nsp (E-Mail)
> > > Subject: [j-nsp] Hot-plugable power-supplies in a M20 ?
> > >
> > >
> > > In the hardware-manual of the M20 I found these two statements
> > > :
> > >
> > > >Hot-removable and hot-insertable-You can remove and
> replace these
> > > components without
> > > >powering down the system and disrupting routing functions.
> > > Power supplies,
> > > fan assemblies, >and Flexible PIC Concentrators (FPCs) are
> > > hot-removable and
> > > hot-insertable.
> > >
> > >
> > > >Verify that a DC power supply is installed correctly:
> > > >Make certain the ejector is clamped down and the thumbscrew
> > > is tightened.
> > > >Turn the power switch on the power supply to the ON position.
> > > >If the power supply is functioning normally, the green OK
> > > power supply LED
> > > directly below >the handle lights.
> > > >Turning on the power supply causes the router to boot.
> > >
> > > I guess there is a conflict between these two points. When I
> > > use a hot-removable and hot-insertable component, the router
> > > mustn't reboot after
> > > turning on a replaced component.
> > >
> > >
> > >
> > > ----------------------------------------------------------------
> > > Carsten Strahler
> > >
> > > IP Planning
> > >
> > > Lambdanet Communications GmbH (AS 13237)
> > > Guenther-Wagner-Allee 13
> > > D-30177 Hannover (Germany)
> > >
> > > Phone +49 (0)511 / 84 88 - 12 86
> > > Fax +49 (0)511 / 84 88 - 12 59
> > > mailto:carsten.strahler@lambdanet.net
> > >
> > > web: www.lambdanet.net
> > > -----------------------------------------------------------
> > >
> >
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> >
> >
>
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