[j-nsp] OSPF neighbor Down :: without reason

[Stefan Fouant]

Sure, there could be many reasons such as mismatched Hello or Dead timers,
duplicate Router IDs, OSPF HELLOs not being processed due to lack of CPU
resources, underlying L2 problems preventing the Hellos from being received,
MTU mismatch, receipt of an unexpected Database Descriptor sequence
number... the list is endless...

And even... sometimes router gremlins come out at night for no other reason
than to make our lives miserable.

Stefan

On Fri, Mar 28, 2008 at 12:04 PM, Farhan Jaffer <bandhani at gmail.com> wrote:

> Thanks for all comments.
>
> But these logs are valuable if it happens again. I am running this n/w
> more than 2 yrs now. And this is first time OSPF neighbor failed
> without any apparent reason.
>
> My question is, Is there any other reasons other than media to flapped
> neighbor relationship?
>
> Thanks again for all feedback.
>
> Regards
> Farhan Jaffer
>
> On Mon, Mar 24, 2008 at 4:47 PM, Stefan Fouant <sfouant at gmail.com> wrote:
> > Can you 'set flag event detail' on the traceoptions within 'protocols
> ospf'?
> > You should be able to get a little more detailed information as to what
> is
> > causing this problem.
> >
> > Stefan Fouant
> >
> >
> > On 3/24/08, Farhan Jaffer <bandhani at gmail.com> wrote:
> > >
> > >
> > >
> > > Hi,
> > >
> > > I am running OSPF in my n/w. Yesterday one neighbor got down & up
> > > after few seconds, i couldn't get any idea from logs.
> > >
> > > One side:
> > > rpd[3120]: RPD_OSPF_NBRDOWN: OSPF neighbor a.b.c.d state changed from
> > > Full to Down due to InActiveTimer (event reason: neighbor was inactive
> > > and declared dead)
> > >
> > > Other side:
> > > rpd[3055]: RPD_OSPF_NBRDOWN: OSPF neighbor e.f.g.h state changed from
> > > Full to Init due to 1WayRcvd (event reason: neighbor is in one-way
> > > mode)
> > >
> > > There was no media flapping, errors on media, router malfunctioning,
> etc,
> > etc.
> > >
> > > Any idea?
> > >
> > > Thanks in advance.
> > > _______________________________________________
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> > > https://puck.nether.net/mailman/listinfo/juniper-nsp
> > >
> >
> >
>