From: Niche (jackyliu419@gmail.com)
Date: Fri Sep 23 2005 - 13:02:56 GMT-3
Hi,
Let's take Imal's question as an example,
Yes, you can use the R3's FR interface for that side of ip unnumbered, but
how about the R1 side? No interface is at area 0 under the ospf process.
Create new subnet is because you need to configure that new subnet under
ospf process as area 0 in order to provide the simulation like VL to extend
the area 0 so area 2 has a touch of area 0 in this case..
Just want to clarify, may be my concept still wrong?
Cheer~
Jacky
On 9/23/05, chrlewis@cisco.com <chrlewis@cisco.com> wrote:
>
> Why would you need to advertize an extra network? Ip unnumbered works.
>
> Chris
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Jian Gu
> Sent: Friday, September 23, 2005 10:24 AM
> To: Imal kalutotage
> Cc: Cisco certification
> Subject: Re: Re- OSPF virtual link
>
> GRE tunnel will always work but you will need to advertise extra network
> which might not be allowed in the real lab.
>
> On 9/23/05, Imal kalutotage <imal.kalutotage@gmail.com> wrote:
> >
> > Hi Group,
> > I also have a similar question..
> >
> > If we have a senario like this
> >
> > -----------FR ---R3--eth----Cat3550----eth-----R1--------
> > Area 0 area 1 area2
> >
> > R3 is the ABR which connects to the area 0 & area 1.
> > R1 is the ABR which connects to the area 1 & area 2
> >
> > Cat 3350 both svi interfaces are in area 1.
> >
> > So we need to create a virtual link or tunnel to connect the area 2 to
>
> > the backbone area.
> >
> > In this case whcih method is prefered? Tunnel or the Virtual-link
> >
> >
> > Cheers,
> > Imal
> >
> >
> > On 9/23/05, Jian Gu <guxiaojian@gmail.com> wrote:
> > >
> > > Meant to say that two ABRs have to have direct L2 connection,
> > > otherwise OSPF packets would have been comsumed by transit routers.
> > >
> > > On 9/23/05, Jian Gu <guxiaojian@gmail.com > wrote:
> > > >
> > > > Hi, all,
> > > >
> > > > Quick question, an OSPF virtual link has to be established between
>
> > > > two ABRs, do the two ABRs have to have a direct L2 connection?
> > > > (direct L2 connection meaning on one Ethernet segement, physical
> > > > serial link or
> > > have a
> > > > frame-relay P2P broadcast PVC). I would say no, because all
> > > > multicast OSPF packets would be consumed by transit routers.
> > > > Better explanation anyone?
> > >
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