From: Marvin Greenlee (marvingreenlee@yahoo.com)
Date: Sun Jun 27 2004 - 15:05:32 GMT-3
In the case of 'backup interface' the interface is in
standby with the line protocol down. You would not be
able to ping the interface, even locally.
Example 2 - Frame Relay and ISIS
In the Frame relay section, you may be asked to
configure a subinterface. The frame-relay section may
not state whether to use a point-to-point or a
multipoint subinterface. A later section may ask you
to configure an ISIS neighbor relationship over the
frame. If you configured the wrong type of
subinterface, your neighbor relationship will not form
between the two routers. In this case, you would need
to 'undo' your previous configuration.
Example 3 - BGP loopback
One section may ask you to configure a few loopbacks
for BGP, and state that all BGP routers should see
those loopbacks. A later section may ask that you
filter such that either only a summary, or only some
of the loopbacks are seen by a certain router.
Obviously, if you are filtering, the earlier
requirement of 'all BGP routers should see these
loopbacks' is broken.
If the conflicting sections are part of the same
general topic (ISDN and ISDN, BGP and BGP, etc.), it
is most likely that the requirement is temporary, and
it is OK if the later step breaks part of the earlier
step.
If the conflicting sections are part of two different
topics, (frame and IGP, etc.) make sure that there is
not a way to accomplish both.
When in doubt, ask the proctor.
As many others have mentioned, make sure to read
through the entire lab before you start.
Marvin Greenlee
Network Learning, Inc.
marvin@ccbootcamp.com
--- ccie2be <ccie2be@nyc.rr.com> wrote:
> Thanks Marvin for that excellent example. But, in
> that case, what should
> one do? Does a solution exist that doesn't break
> the first requirement &
> fulfills the 2nd or in this case, the 2nd task takes
> precedence?
>
> Thanks, Tim
> ----- Original Message -----
> From: "Marvin Greenlee" <marvingreenlee@yahoo.com>
> To: "Richard Dumoulin" <richard.dumoulin@vanco.es>
> Cc: <ccielab@groupstudy.com>
> Sent: Sunday, June 27, 2004 10:40 AM
> Subject: RE: Funky Stuff - Undoing something done
> earlier in the lab
>
>
> > There are times where sections can 'break' other
> > sections. One example would be dial backup with
> > 'backup interface'. The first section could state
> > 'configure ISDN between X and Y...., X should be
> able
> > to ping Y across the ISDN..., etc.' If a later
> section
> > asks for 'backup interface', that would break the
> > ability to ping across the link, as your BRI
> interface
> > is now in 'standby' mode.
> >
> > Marvin Greenlee
> > Network Learning, Inc.
> > marvin@ccbootcamp.com
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