From: Peter van Oene (pvo@usermail.com)
Date: Thu Apr 29 2004 - 11:17:59 GMT-3
At 03:31 AM 4/29/2004, Richard Dumoulin wrote:
>Richard, this is what the employers expect from their engineers, being able
>to find solutions even if the question is absurd. I believe it is also
>required in the exam. Well done and thank you for making me learn something
>today,
What did you learn?
Maybe it was how to hose up your network by changing RID values that likely
causes way more harm than good. While I don't disagree that this might fix
this one problem, it is a waste of time to try and figure out. If you had
RIDs and loopback addresses mixed up in my network, we'd be sitting down
chatting about reference letters and your need to prep your resume.
I don't disagree that learning how to figure out things, and using
technology creatively is a good thing. Who is going to argue with
that. What I disagree with is spending time learning how to manipulate
routers to suit test scenarios that don't relate to appropriate uses of
technology (real world or otherwise) Spending time figuring out how
protocols work when you set them up to do things that they weren't designed
to do has very limited rewards. I personally think that the reason these
situations exist stems from some proctors desire to make the test hard,
instead of making it judge valuable skills.
>--Richard
>
>-----Original Message-----
>From: Edwards, Andrew M [mailto:andrew.m.edwards@boeing.com]
>Sent: jueves, 29 de abril de 2004 1:05
>To: Richard Davidson; Peter van Oene; ccielab@groupstudy.com
>Subject: RE: Another burning question on BGP
>
>
>Nonetheless, I'm glas I asked and thanks for the response Richard.
>
>andy
>
>-----Original Message-----
>From: Richard Davidson [mailto:rich@myhomemail.net]
>Sent: Wednesday, April 28, 2004 1:02 PM
>To: Peter van Oene; ccielab@groupstudy.com
>Subject: Re: Another burning question on BGP
>
>
>I agree with Peter. However, if my memory serves me
>this is what to do.
>
>At the ASBR (R1) you are redistributing the BGP routes
>into ospf and they are comming from the ASBR ospf
>Router ID R1. Those routes get to R3 and they are
>from ,,, you guessed it R1. Well stop there and
>switch to BGP.
>
>R1 & R3 both peers with R2 which is a RR. When the
>BGP route gets to R3 it is from R2 "not R1". Sync
>will fail.
>Solution: swap BGP router IDs with R2 and R1. Now R1
>sends a BGP route as if he is R2. R2 gets it and it
>sends it as if it is R1 to R3. When R3 sees the BGP
>route is from the R1 BGP Router ID and the OSPF route
>is from the R1 ospf Router ID it will sync.
>
>---------------------
>{R1}---{R2}----{R3} |
> |
> AS1 |
>---------------------
>--- Peter van Oene <pvo@usermail.com> wrote:
> > The short answer is that this is an @#$@'ing
> > ridiculous scenario that is a
> > complete waste of your time. If Cisco wants to test
> > on it, then shame on
> > them for forcing you to study such a moronic topic.
> > There is nothing
> > anywhere near a practical requirement for such a
> > topology and
> > synchronization is years more outdated than many of
> > the already deprecated
> > items that have found space on the CCIE lab.
> >
> >
> >
> > At 12:39 PM 4/28/2004, Edwards, Andrew M wrote:
> > >I'm trying to understand methods to keep
> > synchronization on in BGP and
> > >provide BGP to OSPF redistribution with route
> > reflectors.
> > >
> > >You know the problem where the route reflector
> > server receives an update
> > >from a route reflector client that is
> > redistributing BGP to OSPF.
> > >
> > >When the route reflector server gets the update, it
> > reflects that update
> > >to all other RR clients but changes the BGP ID to
> > itself.
> > >
> > >Obviously the other BGP RR clients get the BGP
> > update but the OSPF
> > >router ID and BGP ID do not match on the clients so
> > the BGP route is not
> > >marked
> > >As a best path ">"
> > >
> > >So the question I have is what methods are
> > available to make this work
> > >with synchronization on and using route reflectors?
> > >
> > >Is the answer go to full mesh or transfer to
> > confederations?
> > >
> > >I'm stumped on how to change the BGP router-id to
> > the originators BGP
> > >router ID on the RR server.
> > >
> > >Thanks for the input... or clearing up my
> > confusion.
> > >
> > >Andy
> > >
> >
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> >
> >
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>
>=====
>Richard Davidson
>Yahoo IM: r1davidson
>e-mail rich@myhomemail.net
>
>_______________________________________________________________________
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>
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>
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>
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