From: Sam Munzani (smunzani@xxxxxxxxx)
Date: Wed Sep 20 2000 - 21:26:21 GMT-3
That's correct. It is very close to a real lab
scenario according to some romours I heard.
An the thing is, I had it working once. This time it
doesn't work.
Sam
--- Daniel Keller <DMKeller@comdisco.com> wrote:
> The problem is that area 2 is a virtual link.
> Because of this, LS updates will always keep the
> line dialing. Can you place the bri connections
> into a different area? If not you will need to find
> an alternative, such as using backup interface. Is
> this from a lab that you have?
>
> Dan Keller
>
> >>> Sam Munzani <smunzani@yahoo.com> 09/20/00
> 05:50PM >>>
> Hi Group,
>
> I have attached my configs with e-mail. Tell me what
> am I doing wrong? ISDN keeps flapping. Scenario is
> as
> below.
>
> Grumpy--(Bri 0) ------ (Bri 0 )-- Sleepy
>
> The BRI link is in OSPF area 2. I used OSPF demmand
> circuit and also used no peer neighbor route.
> Bandwidth is not specified on serial link so it will
> be default T1 for frame link.
>
> I have also attached "ip ospf data" results on each
> router. I had it working some time ago but this time
> it doesn't work.
>
> Rather than throwing some hints please justify
> proper
> methodology for this configuration. I am sure
> everybody will get hit by this scenario in some
> flavor
> so it is important.
>
> Sam
>
>
> --- Daniel Keller <DMKeller@comdisco.com> wrote:
> > Because the BRI's are in area 0, OSPF updates will
> > constantly be triggering the 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 interface
> > 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 bri0
> > > 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 interfaces
> > > > 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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