Re: isdn - backup - challenge - authentication ??? posted 03/07/2003
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
> 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
> 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
> into OSPF.
> let me know if that helps/
> --- tria_ka@xxxxxxx 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:
> > (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
> > 220.127.116.11 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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