Once again: OSPF demand circuit & ISDN

From: Carlos G Mendioroz (tron@xxxxxxxxxxx)
Date: Sun Jun 30 2002 - 16:45:19 GMT-3


   
Hi,
got into a troublesome area, and no luck in getting out.

I have a simple setup, 2 routers linked via serial and ISDN.
OSPF in both links, ip ospf demand-circuit on ISDN, only
one side dialing. No other routing protocol involved.

It seems to break if I set dialer-profiles + multilink ppp
at the receiving side. Dialer profile w/o MPPP is ok.
Interface config (aka legacy) with or w/o MPPP is ok.
But as soon as I set dialer + multilink, there seems to
be a link down transient at the receiving side,
that gets translated in a LSA update that in turn triggers
a new call just after the previous one is torn down
(LS sequence jumps up by 2 each time).

I've read some 100+ posts on the subject but nothing that
clears this (but, maybe, some suggestions to filter
ospf traffic as interesting, that is not what I want to do).

Have tried 12.1.13, 12.1.15, 12.2.8T4 and all do the same.

Here's the receiving side conf:

interface BRI0/0
 no ip address
 encapsulation ppp
 dialer pool-member 1
 isdn switch-type basic-ni
 isdn spid1 1555000021
 isdn spid2 1555000021
 ppp authentication chap
 ppp multilink

interface Dialer1
 ip address 172.16.200.1 255.255.255.0
 encapsulation ppp
 ip ospf demand-circuit
 dialer pool 1
 dialer remote-name 2602
 dialer-group 1
 ppp authentication chap
 ppp multilink

Any suggestion as to how to get this working (or definitive
reason as to why it will not) is very welcome!

--
Carlos G Mendioroz  <tron@huapi.ba.ar>  LW7 EQI  Argentina


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