From: CCIE FUN (ccieexam2002@yahoo.com)
Date: Mon Mar 10 2003 - 17:59:34 GMT-3
enter command
show dialer and see the dial reason.
that should tell you if RIP is triggering the call.
But if you have OSPF/RIP configured on the same router
and both OSPF/RIP subnets fall under the same major
class then it is good idea to deny rip updates over
ISDN.
--- tria_ka@gmx.net wrote:
> hi,
>
> thanks for the information.
> now i want to deny the rip updates.
>
>
> > There are reasons for the ISDN demand circuit to
> flap.
> > topology change on the OSPf network somewhere.
> > and i see u are redistributing rip.
> > disallow any rip updates in the dialer list.
> > also about your question R1 is not allowed to
> > authenticate.
> > This means you need to configure PPP
> > authentication(pap or chap) callin on R2.
> > This means only R2 is authenticated by R1 but R1
> is
> > not by R2.
> >
>
> i wait for a time but the router dial more than 10
> times.....and never
> stop..;-)
>
>
>
> >
> > Initially when you configure demand-circuit it
> > typcially goes up and down for a while until the
> > database are synchronised.
> > once that is done it should settle down unless
> > something changes somewhere on the network not
> > necessarily on OSPF but in rip which gets
> > redistributed
> > into OSPF.
> >
> > let me know if that helps/
> >
> > --- tria_ka@gmx.net wrote:
> > > hi group,
> > >
> > > actual i configure some isdn environments for
> > > preparing for the lab.
> > > now i'm a littlie confused about what to do and
> > > exactly what is the mean of
> > > the sample questions.
> > > assume the following:
> > >
> > >
> >
>
R1-------ethernet--------(ospf)-R2-(RIP)---------------R3
> > > (RIP)
> > > | ospf a0 |
> > > |_______isdn backup_____________|
> > >
> > > R1/R2 speaks ospf and R3 only RIP. Distribution
> is
> > > on R2.
> > >
> > > Q:isdn should put in ospf area while ethernet
> > > between R1/R2 too. The same
> > > area.
> > > isdn shoul act as backup but without the backup
> > > statement.
> > > The isdn link should not flap.
> > >
> > > also R1 NOT allowed to authenticate.
> > > sometimes i also confused about anything like
> this:
> > > Rx...shoud not
> > > challenge.
> > > what does it mean exactly with not challenge??
> > >
> > > first i configure this scenarium without
> > > authentication and want to test
> > > ospf demand-circuit.
> > > but the link always stay up and if it go down
> there
> > > comes a broadcast
> > > 224.0.0.5 and bring it up.
> > > i think with the demand statement there are no
> ospf
> > > packets about this link
> > > ??
> > >
> > > any help ? thanks
> > >
> > > udo
> > >
> > > --
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