From: Kevin Baumgartner (kbaumgar@xxxxxxxxx)
Date: Wed Sep 20 2000 - 19:02:05 GMT-3
That's OK since the LSA hellos will not be sent across when OSPF demain circuit
is enabled on the BRI interface. The problem is that if you redistribute this r
oute back
into OSPF for another routing protocol this will be seen as a topology change
and will cause the ISDN line to be brought up. Topology changes are what cause
the link to be activated.
Kevin
At 04:48 PM 9/20/00 -0500, you wrote:
>Because the BRI's are in area 0, OSPF updates will constantly be triggering th
e ISDN line. How do you keep this line from always coming up?
>
> >>> Kevin Baumgartner <kbaumgar@cisco.com> 09/19/00 09:42PM >>>
> Why do say that OSPF demand circuit won't cut it?
>The key to using demand circuit is
>
> 1. Define the bandwidth on the BRI interface to be less that serial interfac
e
> 2. If doing any redistribution on either of the BRI routers
> filter such that IP subnet between the two BRI router
> interfaces doesn't get redistributed. If you let this route
> through the BRI interface will flap because of routing updates.
> 3. Define OSPF demand circuit on only one router (optional).
>
>The other two methods to do this is like you said dialer watch-list
>and backup interface.
>
> Kevin
>
>
> >
> > Hey bud, got a good config for the following ?
> >
> > s0 & bri0 are in the same area 0 of OSPF
> >
> > what's a good dial backup config for this for when s0 goes down without bri
0
> > flapping? demand circuit doesn't seem to cut it, floating statics are out
of
> > the question, leaving only dialer watch-list (IOS 12.3 & higher) or backup
> > interface - but what other way is there if any !?
> >
> >
> > Mike L. Chase
> > Sr. Network Architect
> > ISG: Information Services Group
> > Broadcom Corporation World Headquarters, BLDG A-1050
> > 16215 Alton Parkway, Irvine, California 92618-3616
> > OFFICE:949-585-6057|CELL:949-283-4254|FAX:949-585-6227
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > Kevin Baumgartner
> > Sent: Tuesday, September 19, 2000 7:10 PM
> > To: Steve McNutt
> > Cc: ccielab@groupstudy.com
> > Subject: Re: Hello, new on list
> >
> >
> > Yes in theory ISDN is simple but I would be able to do the following
> > and have practiced the following on routers.
> >
> > 1. OSPF on demand circuit
> > 2. Dial backup
> > 3. Appletalk over ISDN (and how to filter so ISDN is not up all the time)
> > 4. IPX over ISDN (also how to filter so ISDN is not up all the time)
> > 5. Dialer watch
> > 6. PPP Multilink
> > 7. PPP CHAP/PAP
> > 8. PPP Callback
> > 9. Snapshot routing
> >
> > Kevin
> >
> > >
> > > practice ISDN? ISDN is pretty simple to configure and troubleshoot. DOD
> > > routing using rotary groups and dialer profiles gives me fits though hehe
.
> > > If you don't build your configs in the correct order the dialer interface
s
> > > never seem to work right.
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > > Kevin Baumgartner
> > > Sent: Tuesday, September 19, 2000 9:30 PM
> > > To: jix@netrue.com
> > > Cc: ccielab@groupstudy.com
> > > Subject: Re: Hello, new on list
> > >
> > >
> > > If you don't practice ISDN, ATM or FR you have no chance of passing.
> > > They have to be part of your practice lab.
> > >
> > > Kevin
> > >
> > >
> > >
> >
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