From: Mark Detrick (mdetrick@xxxxxxxxx)
Date: Thu Jun 22 2000 - 20:59:51 GMT-3
Muthu,
Question about below. If your DDR is 30 bit mask and you are redistributing
RIP into OSPF, why would there be a topology change? What I'm thinking
about is the fact that RIP is classful and 30 bit mask is not. In the lab
the ISDN does go up and down with no route-map. I haven't had the chance to
try the filter yet.
What do you think?
Mark Detrick
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Muthu Mohanasundaram
Sent: Saturday, May 13, 2000 7:02 AM
To: ccielab@groupstudy.com
Subject: Re: OSPF demand circuit
Hi,
Are you running IGRP, EIGRP or RIP on this router and
redistributing into OSPF?
If so, you will have to redistribute only the relevant
routes into OSPF.Use route-maps while redistributing
into OSPF.
The resaon is, after the idle timer the ISDN will go
down due to demand circuit, but IGRP (or RIp or EIGRP)
will see it as a link down and advertise it to the
IGRP domain. Becasue of redistribution, this will also
be redistributed into OSPF. Therefore OSPF thinks
there is a change in topology and brings up the ISDN
to send the LSA to the other end. This is the reason
ISDN goes up and down.
So the solution is to redistribute only routes in the
IGRP domain. You can use route-maps of distribute-list
in commnad on the IGRP side interfaces.
Read Jeff Doyle pages 776 - 780.
Good Luck,
Mohan.
--- tok cok <tokcok@hotmail.com> wrote:
> Hi,
> I thought using ospf demand-circuit will keep the
> line quiet but seem it is
> not.
>
> Below is the routers' configuration, R5 and R6.
> Demand-circuit is used on
> the ISDN link. But the ISDN line keeps going up due
> to the multicast
> traffic ( I did a show dialer packet).
>
> Can anyone help me in this? Did I miss out anything
> to make the demand
> circuit
> works?
>
> Router 6
> interface BRI0
> ip address 137.20.224.6 255.255.240.0
> encapsulation ppp
> ip ospf demand-circuit
> dialer idle-timeout 10
> dialer map ip 137.20.224.5 name R5 broadcast 5552000
> dialer-group 1
> no cdp enable
> ppp authentication chap
> !
> !
> dialer-list 1 protocol ip permit
> !
>
>
> Router 5
> interface BRI0
> ip address 137.20.224.5 255.255.240.0
> encapsulation ppp
> dialer idle-timeout 10
> dialer map ip 137.20.224.6 name R6 broadcast
> dialer-group 1
> no cdp enable
> ppp authentication chap
> !
> !
> dialer-list 1 protocol ip permit
> !
>
>
>
> deb dialer packet
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 84 bytes,
> interesting (ip PERMIT)
> BRI0: sending broadcast to ip 137.20.224.5
> %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected
> from 5552000 R5, call
> lasteds
> %LINK-3-UPDOWN: Interface BRI0:1, changed state to
> down
> %LINEPROTO-5-UPDOWN: Line protocol on Interface
> BRI0:1, changed state to
> down
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 84 bytes,
> interesting (ip PERMIT)
> BRI0: sending broadcast to ip 137.20.224.5 --
> failed, not connected
> %LINK-3-UPDOWN: Interface BRI0:1, changed state to
> up
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 84 bytes,
> interesting (ip PERMIT)
> BRI0: sending broadcast to ip 137.20.224.5
> %LINEPROTO-5-UPDOWN: Line protocol on Interface
> BRI0:1, changed state to up
> %ISDN-6-CONNECT: Interface BRI0:1 is now connected
> to 5552000 R5
> %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected
> from 5552000 R5, call
> lasteds
> %LINK-3-UPDOWN: Interface BRI0:1, changed state to
> down
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 84 bytes,
> interesting (ip PERMIT)
> BRI0: sending broadcast to ip 137.20.224.5 --
> failed, not connected
> %LINK-3-UPDOWN: Interface BRI0:1, changed state to
> up
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 84 bytes,
> interesting (ip PERMIT)
> BRI0: sending broadcast to ip 137.20.224.5
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 64 bytes,
> interesting (ip PERMIT)
> BRI0: sending broadcast to ip 137.20.224.5
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 64 bytes,
> interesting (ip PERMIT)
> BRI0: sending broadcast to ip 137.20.224.5
> %ISDN-6-CONNECT: Interface BRI0:1 is now connected
> to 5552000 R5
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 64 bytes,
> interesting (ip PERMIT)
> BRI0: sending broadcast to ip 137.20.224.5
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 84 bytes,
> interesting (ip PERMIT)
> BRI0: sending broadcast to ip 137.20.224.5
> %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected
> from 5552000 R5, call
> lasteds
> %LINK-3-UPDOWN: Interface BRI0:1, changed state to
> down
> %LINEPROTO-5-UPDOWN: Line protocol on Interface
> BRI0:1, changed state to
> down
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 84 bytes,
> interesting (ip PERMIT)
> BRI0: sending broadcast to ip 137.20.224.5 --
> failed, not connected
> %LINK-3-UPDOWN: Interface BRI0:1, changed state to
> up
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 84 bytes,
> interesting (ip PERMIT)
> BRI0: ip (s=137.20.224.6, d=224.0.0.5), 84 bytes,
> interesting (ip PERMIT)
>
>
>
>
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