From: Joseph Saad (joseph.samir.saad@gmail.com)
Date: Sat Sep 08 2007 - 12:16:05 ART
Yes it will.
There is possibly a route via a hub to the "lost stub neighbor" via the hub.
In a sense, still however your stub neighbor is still a hub (as it is
connected to another stub neighbor which you lost the route to its
networks).
Also for this to work, default of sending connected and summary wouldn't be
enough for reachability from the "real hub" to the end spokes, unless you
manually configure a summary.
Very complex, but the point is: you configure eigrp stub on a spoke router
which is only connected to the hub. This basically tells the hub not send
queries to this stub in case it lost a route to a network which it doesn't
have a feasible successor. It also control the advertisement from the stub
router to hub. Connected and Summary by default.
Joseph.
On 9/8/07, lalit gupta <lalit.tech@gmail.com> wrote:
>
> Hey Joseph,
>
> what if stub router itself has stub neighbors ? Will it query hub router
> for route lost to stub neighbor ?
>
> thanks
>
> On 9/8/07, Joseph Saad <joseph.samir.saad@gmail.com> wrote:
> >
> > It is not sensible to configure a hub router as an EIGRP stub router in
> > the
> > first place. It is meant to be configured on spokes.
> >
> > I don't see a reason that would require a hub router to be configured as
> > an
> > EIGRP stub.
> >
> >
> >
> > On 9/8/07, lalit gupta <lalit.tech@gmail.com> wrote:
> > >
> > > HI Nitin,
> > >
> > > I have lab it up and found that stub does query to hub... This
> > question
> > > seems interesting...
> > >
> > >
> > > Rack1R1#debug eigrp packets query
> > > EIGRP Packets debugging is on
> > > (QUERY)
> > > Rack1R6#
> > > *Sep 8 18:56:58.463: EIGRP: Received QUERY on FastEthernet1/1.68 nbr
> > > 4.4.68.10
> > > *Sep 8 18:56:58.467: AS 10, Flags 0x0, Seq 133/0 idbQ 0/0 iidbQ
> > un/rely
> > > 0/0 peerQ un/rely 0/0
> > >
> > > After making downstream neighbor stub still the results are same
> > >
> > > Rack1R1#
> > > *Sep 8 18:59:02.095: EIGRP: Received QUERY on FastEthernet1/1.68 nbr
> > > 4.4.68.10
> > > *Sep 8 18:59:02.099: AS 10, Flags 0x0, Seq 145/56 idbQ 0/0 iidbQ
> > > un/rely
> > > 0/0 peerQ un/rely 0/0
> > >
> > > If stub has multiple routers attached ..... and if it does query to
> > hub
> > > for
> > > lost routes then i really dont understand the purpose of making stub
> > > network
> > > in eigrp...
> > >
> > > Can some one test this topology and reply , What is the purpose of
> > stub
> > > router if it has multiple neighbors as stub ?
> > >
> > >
> > >
> > > thanks
> > > lalit
> > >
> > >
> > >
> > > On 9/8/07, NITIN NITIN <ccie_study_123@yahoo.com> wrote:
> > > >
> > > > Hi ,
> > > >
> > > > I have a querry , if I have
> > > >
> > > >
> > > > R1 ---- R2 ( EIGRP STUB) ---R3
> > > >
> > > > As per my knowledge R1 doesn't send querry to R2 for Lost routes.
> > > >
> > > > if R3 loopback goes down and R2 is eigrp stub , will R2 send
> > querry to
> > > > R1 for this
> > > >
> > > >
> > > >
> > > >
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