From: chrlewis@cisco.com
Date: Fri Sep 23 2005 - 12:51:51 GMT-3
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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