From: Brian Van Benschoten (vader@xxxxxxxxxxxx)
Date: Tue May 25 1999 - 23:19:13 GMT-3
I thought the IP OSPF NETWORK POINT-TO-POINT also stopped the DR election.
All routers ( directly connected via a PVC) on a frame-relay network using
this command would establish a FULL adjacency without the electing a DR and
a BDR?
any comments
----- Original Message -----
From: Scott Morris <SMorris@tele-tech.com>
To: 'Nentarz, Dave' <Dave.Nentarz@compaq.com>; 'Brian Van Benschoten'
<brian.vanbenschoten@inacom-msn.com>; <ccielab@groupstudy.com>
Sent: Monday, May 24, 1999 6:11 PM
Subject: RE: OSPF and virtual links
> Ummmm.... All that statement does (as far as i'm aware) is change the
> timers of the OSPF process on that interface... If you want to advertise
a
> loopback any way other than /32, you'll need to do redistribute connected,
> and possibly use a route map to pull that route through (ie. don't add
that
> network directly into the OSPF process).
>
> Scott Morris, MCSE, CNE (3.x), CCDA, CCIE #4713
> smorris@tele-tech.com
>
>
> -----Original Message-----
> From: Nentarz, Dave [mailto:Dave.Nentarz@compaq.com]
> Sent: Monday, May 24, 1999 10:20 AM
> To: 'Brian Van Benschoten'; ccielab@groupstudy.com
> Subject: RE: OSPF and virtual links
>
>
> I remember seeing a tech tip regarding this.
>
> Configure this under (loopback) interface mode:
> ip ospf network point-to-point
>
> This will make OSPF advertise your loopback interface as the network or
> subnet it's mask defines, rather than the /32 host route.
>
> I tried searching CCO docs for this to find which IOS level this first
> appeared in as a feature, but couldn't find anything on it..I'll keep
> looking.. try it in your lab and let me know if it works.
>
> Dave
>
> -----Original Message-----
> From: Brian Van Benschoten [mailto:brian.vanbenschoten@inacom-msn.com]
> Sent: Sunday, May 23, 1999 12:55 PM
> To: ccielab@groupstudy.com
> Subject: OSPF and virtual links
>
>
> I set up a lab test using virtual links. I used loopback interfaces
with
> high ip numbers) on both the routers that the vitural link connected. I
did
> this for stability and the fact the one of the routers had an ISDN dial
> backup link with a higher IP address than the other interaces. This is
the
> method most people recommend to do in the field. I realized that the
> loopbacks must be reachable from both routers in order to establish the
> virtual link. (the virtual link command points to the ROUTER ID, not an
> interface) so i included the loopbacks in the routing protocol. This got
me
> thinking about the CCIE lab
>
> A question regarding the CCIE lab exam..... I've had people tell me not
to
> do anything extra / more than is asked for during the lab. People have
told
> me that at the end of a section where different ip routing protocols /
> redistribution are used, all routers should be able to ping all other
> interfaces. Does this mean the "extra" interfaces i created to do a task
?
>
> If i include my loopback interfaces in whatever area my router is in,
using
> the network command; OSPF advertises loopback interfaces as /32. This
mask
> wont redistribute into classfull routing protocols like IGRP. I could run
> the loopbacks in a seperate area an use the "area range" to summarize
those
> addresses to match whatever subnet nask the classful protocol needed. But
> then am I supposed to create more OSPF areas than what the lab required ?
I
> could redistribute connected into OSPF but then the routes show up as
> external ?
>
> anyone see where I'm going with this ? Any opinions?
>
>
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