ISDN demand circuit question: link always up why?

From: michael robertson (michael_w_2ca@xxxxxxxx)
Date: Fri Feb 15 2002 - 01:03:40 GMT-3

   
Hi, Group,

Can somebody explain to me the following link

http://www.cisco.com/warp/customer/104/dcprob.html

Reason 4:

When the link goes down the /32 disappearspears and
OSPF understands this as a change in topology. The
demand circuit brings the link up again to propagate
the MAXAGE version of the /32 mask to its neighbor.

I understand that ppp will install a /32 host in R1, (
even though I don't know why here). but wy the demand
circuit has to bring up the link to propogate teh
MAXAGE version of /32 mask to its neighbot.

So why one solution can be that you use different
major net at the different R1 ( rip router) interface

 as always, any help will be greatly appreciated

thanks

Michael

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