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Re: advertise EIGRP internal route as external posted 02/20/2007
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"I am working on EIGRP and came across an issue that I can't resolve.  How
do
you configure a device to advertise a prefix that is connected to another
EIGRP neighbor as an External route? " by Jo Johnson on Jan 23.

Dayo: Hopefully this will clarify what I meant about similar situations:

Situation 1:"diagram"
(1.1.1.0). --- R1 ----- R2 ------ R3

(1.1.1.0) -- R1--- R2: OSPF process 1 area 0
R2 - R3: OSPF process 2 area 0
if in R2 you mutually redistribute OSPF 1 into 2, R3 would see network
1.1.1.0 as External

Situation 2:"diagram"
(1.1.1.0) -- R1 --- R2 ----R3


(1.1.1.0) -- R1 --- R2: EIGRP AS 10
R2 --- R3: EIGRP AS 20
if in R2 you mutually redistribute between AS 10 and 20, R3 would see
network 1.1.1.0 as External


My question is if it's possible to have another way to configure these EIGRP
routers so that R3 would receive network 1.1.1.0 as External without adding
new secondary IP addresses?

Thanks,
Andre



On 2/20/07, Narbik Kocharians <narbikk@xxxxxxxxx> wrote:
>
> Is it possible to repost the question?
>
>
>
> On 2/19/07, Andre Serrao <andreserrao@xxxxxxxxx> wrote:
>
> > That was not my idea..To be in the same AS number is one of the
> > requirements
> > > of EIGRP neighbor relationship. My solution is to have one router (R1)
> >
> > > configured with two ASs (10, 20). One AS (10) has to be the same as
> > the
> > > neighbor (R2). The route to be seen as external by that neighbor (R2)
> > will
> > > be in a different AS (20). In R1, you will have to redistribute
> > between
> > > eigrp 10 and eigrp 20.
> > >
> > > I saw some labs from vendors that use the technique of having  1 OSPF
> > > router with 2 processes and then redistributing between each process.
> > I
> > > think the same idea could be applied to EIGRP.
> > >
> > > On 2/19/07, dayo@xxxxxxxxxxxxx <dayo@xxxxxxxxxxxxx> wrote:
> > > >
> > > > do you think eigrp will see its neighbour if they are not configured
> > to
> > > > be in the same AS number
> > > >
> > > > On 2/19/07, Andre Serrao < andreserrao@xxxxxxxxx> wrote:
> > > >
> > > > > I am trying to catch up with the discussions of this group, and I
> > came
> > > > >
> > > > > across this one (sent 1 month ago) which I believe it's still
> > > > > unresolved.
> > > > >
> > > > > Although I like Bit Gossip's solution, I don't think it's the best
> >
> > > > > one,
> > > > > specially if a question like that doesn't let you add any new IP
> > > > > addresses
> > > > > (same restriction as the real exam).
> > > > >
> > > > > My solution for this question would have the eigrp routers in
> > > > > different AS
> > > > > and then redistribute between them. However, that would only be
> > > > > possible if
> > > > > question DOES NOT specify that those routers have to be in the AS.
> >
> > > > >
> > > > > Does anybody agree with this? And if the AS numbers have to be the
> > > > > same, any
> > > > > ideas how to solve it?
> > > > >
> > > > > Andre
> > > > >
> > > > >
> > > > > On 1/23/07, Jo Johnson < groupstudyjo@xxxxxxxxx > wrote:
> > > > > >
> > > > > > Hi everyone,
> > > > > >
> > > > > >
> > > > > >
> > > > > > I am working on EIGRP and came across an issue that I can't
> > > > > resolve.  How
> > > > > > do
> > > > > > you configure a device to advertise a prefix that is connected
> > to
> > > > > another
> > > > > > EIGRP neighbor as an External route?  With the configuration
> > below,
> > > > > the
> > > > > > route continues to show up as internal with an AD of 90.  If I
> > take
> > > > > out
> > > > > > the
> > > > > > network statement for that prefix, my neighbor relationship goes
> > > > > down and
> > > > > > the route is advertised as external.  Neither solves my problem.
> >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > router eigrp 99
> > > > > >
> > > > > > redistribute connected metric 1 1 1 1 1 route-map EXTERNAL
> > > > > >
> > > > > >
> > > > > >
> > > > > > route-map EXTERNAL permit 10
> > > > > >
> > > > > > match interface gig 0/0
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > Thanks,
> > > > > >
> > > > > > Jo
> > > > > >
> > > > > >
> > > > >
> > _______________________________________________________________________
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> >
> > _______________________________________________________________________
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> >
>
>
>
> --
> Narbik Kocharians
> CCIE# 12410 (R&S, SP, Security)
> CCSI# 30832
> Network Learning, Inc. (CCIE class Instructor)
> www.ccbootcamp.com (CCIE Training)