From: Ina&Laurean (ina.laurean@gmail.com)
Date: Wed May 14 2008 - 23:43:29 ART
Depending on IP address space on Area 5 you may experince problems if you
want to summarize.
A single summary route for Area 5 won't work if you don't link the two
sections together.
Laurean
On Wed, May 14, 2008 at 9:31 PM, Miguel Trejo <mike.trejo@gmail.com> wrote:
> The main reason behind this working with no problem is that LSA doesn't
> carry out area information once they are injected as inter-area routes. So
> when they reach the "other"area 5 that ABR doesn't care about the original
> area this belonged to, only about the ABR that originated the route as the
> routers inside the "other" area 5 only care that this ABR knows how to
> reach
> the remote networks. OSPF is alink state protocol only at area level, when
> talking about routes to networks in other areas we rely on what the ABR
> says, pretty much like distance vector.
>
>
> On Sat, May 10, 2008 at 3:51 PM, ahmed badr <eng.ahmedbadr@gmail.com>
> wrote:
>
> > ok I got it. thnx
> >
> >
> >
> > 2008/5/10 Ibrahim kabir <kebramccie@live.com>:
> >
> > > yeah jason i meant OI i.e inter-area routes. The terms keep confusing
> me
> > > inter(btween areas) and intra(within same) area.
> > >
> > > Kabir K Ibrahim
> > > B.sc CCNA CCNP CCDP CCNP MCP
> > > +2348036477283
> > >
> > >
> > > > Date: Sat, 10 May 2008 08:23:43 -0600
> > > > From: madsen.jason@gmail.com
> > > > To: kebramccie@live.com
> > > > Subject: Re: OSPF areas
> > > > CC: eng.ahmedbadr@gmail.com; ccielab@groupstudy.com
> > >
> > > >
> > > > correct, a virtual link doesn't seem appropriate here. Kebram, I
> think
> > > you
> > > > meant that the discontiguous area 5s are seeing each other as
> > inter-area
> > > > routes and not intra-area routes, right? each area 5 should end up
> > being
> > > > it's own unique area unless a tunnel is used.
> > > >
> > > > Jason
> > > >
> > > > On Sat, May 10, 2008 at 6:15 AM, Ibrahim kabir <kebramccie@live.com>
> > > wrote:
> > > >
> > > > > Ahmed,
> > > > >
> > > > > neva thought about this type of design at all. bt i labbed it and
> it
> > > worked
> > > > > without gre or virtual-links. The main thing to look out for is
> that
> > > each
> > > > > area
> > > > > should be connected to the backbone area (Area 0). and looking at
> > your
> > > > > diagram the condition is true. only that the discontigious area 5's
> > see
> > > > > each
> > > > > others routes as intra-area routes.
> > > > > Lab it and see for urself.
> > > > > cheers,
> > > > > kebram
> > > > >
> > > > >
> > > > > > Date: Sat, 10 May 2008 13:30:06 +0300> From:
> > eng.ahmedbadr@gmail.com
> > > >
> > > > > To:
> > > > > ccielab@groupstudy.com> Subject: OSPF areas> > Dears,> > according
> > to
> > > the
> > > > > diagram below, should I link area 5 in the two sides by any> mean
> (eg
> > > > > tunnel)
> > > > > or it should work fine.> > > > Area5 Area0 Area5>
> -------------------
> > > > > ----------- ------------------> - - - - - -> - --R1-----------
> > > > > R2------------R3------------R4-- -> - - - - - ->
> -------------------
> > > > > ----------- -------------------> > >
> > > > >
> > >
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