Re: should i use virtual-link in this case?

No.
Because when LSA type 1 and 2 from area 1 on the left hit the ABR, they get
to the backbone and to the other right area 1 as LSA 3.
In this LSA there is no note of which area it came from.
For routers in right area 1, they see it as LSA type 3 and work just fine.

The only need for virtual links is to connect discontiguous (or separated)
area 0's

On Wed, Nov 30, 2011 at 12:37 PM, Lindsay Hill <lindsay.k.hill_at_gmail.com>wrote:

> No.
>
> Virtual links are for connecting disconnected backbones, i.e. area 0s.
>
> If your network looked something like this:
>
> Area0 --- R1 --- Area 1 ---- R2 --- Area 0, then you would need to look at
> virtual links.
>
> Having disconnected non-backbone areas is not a problem technically,
> although it can do your head in a bit when you're trying to work out what's
> going on.
>
> - Lindsay
>
> On 30/11/2011, at 8:32 PM, Tom Young wrote:
>
> > hi, everybody
> >
> > Pls give me a judgement that should should i use virtual-link in the
> case below?
> >
> > Area1----R1-----Area0-------R2----Area1
> >
> > Do I have to set a virtual-link between R1 and R2 for connecting the
> area 1??
> >
> > Thanks
> >
> >
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Received on Wed Nov 30 2011 - 15:39:07 ART