From: Shamin (ccie.xpert@gmail.com)
Date: Thu May 24 2007 - 09:35:17 ART
Hi,
So you mean to say that, in the area range summarization command,
I will not be able to configure as below.
area 0 range 10.10.4.0 <http://10.10.0.0/> 255.255.224.0 .
It should be
area 0 range 10.10.0.0 255.255.224.0
Confusion arised as in some summarization commands, we configure the
the first network in the summary as the argument for the
summarization command.
Thanks
regards
On 5/24/07, Ronnie Angello <ronnie.angello@gmail.com> wrote:
>
> Your 2nd config, 10.10.0.0/19, is both correct and as specific as
> possible.
>
>
>
> On 5/24/07, Shamin <ccie.xpert@gmail.com> wrote:
>
> > Dear All,
> >
> > I have a rather basic question. If someone can clear it off.
> >
> > I have the topology as below.
> >
> >
> > Area 1 Area 0
> > R2 <----------------------> R3 <---------------------> R4
> >
> > I am running Ospf Area 1 between R2 & R3 , and Area 0 between R3 & R4.
> >
> > R4 has 4 loopback interfaces with the following IP's advertised into
> > Area 0
> >
> > 10.10.4.1
> > 10.10.18.1
> > 10.10.20.1
> > 10.10.25.1
> >
> > The requirement is that, R2 sees a single route all these 4 networks.
> > So we have to configure a area range command.
> > Now my qestion is , If the question is that the summary should be as
> > specific as possible,
> > how will the summary configuration be like.
> >
> > The binary for the 3rd octet is as below,
> > 4 - 00000100
> > 18 - 00010010
> > 20 - 00010100
> > 25 - 00011001
> >
> > As per my understanding, we can configure to the summary to be till the
> > 19th
> > bit. i.e 255.255.224.0
> >
> > So should the configuration be on R3 as below:
> >
> > router ospf 1
> > area 0 range 10.10.4.0 255.255.224.0
> >
> > OR
> >
> > router ospf 1
> > area 0 range 10.10.0.0 255.255.224.0
> >
> >
> > With the 1st config, the router gives a error, that of an Iconsistent
> > mask.2nd config is accepted
> >
> > Can any one guide me as to which is the correct config and is my
> > configuration meeting the requirement
> > that the summary shoyld be as specific as possible.
> >
> > Regards
> > All the best in your preprations
> >
> > Shamin
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
>
>
>
> --
> Ronald Angello
> CCIE #17846
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