From: Peng Zheng (zpnist@yahoo.com)
Date: Fri Sep 13 2002 - 00:03:41 GMT-3
Thanks.
--- Jay Hennigan <jay@west.net> wrote:
> On Thu, 12 Sep 2002, Peng Zheng wrote:
>
> > Hi,
> >
> > I saw this under OSPF FAQ.
> >
> > Q: Which address-wildmask pair should I use for
> > assigning an unnumbered interface to an area?
> >
> > A: When an unnumbered interface is configured, it
> > references another interface on the router. When
> > enabling OSPF on the unnumbered interface, use the
> > address-wildmask pair of interfaces to which the
> > unnumbered interface is pointing.
> >
> > But I don't understand.
> >
> >
> > for example:
> >
> > (e0)R1(s0)-----(s0)R2(e0)
> >
> > Ip of e0 on R1: 1.1.1.1/24
> > ip of e0 on R2: 2.2.2.2/24
> > IF both s0 use ip unnumber ethernet 0
> >
> > And if I want to assign s0 of R1 to area 0
> >
> > Which address/wildmask I should use?
> > 2.2.2.2/24?
>
> No. The network statement determines which
> interfaces local to the
> router will participate in OSPF, and in what areas.
>
> Presumably on s0's interface configuration you have
> something like:
> ip unnumbered ethernet 0
>
> You would then use e0's address in the OSPF network
> statement.
>
> network 1.1.1.0 0.0.0.255 area 0
>
> Similarly, R2 will have in its OSPF router
> configuration:
>
> network 2.2.2.0 0.0.0.255 area 0
>
>
> Referencing loopbacks might be a better design if
> the scenario allows it.
>
> --
> Jay Hennigan - CCIE #7880 - Network Administration -
> jay@west.net
> NetLojix Communications, Inc. -
> http://www.netlojix.com/
> WestNet: Connecting you to the planet. 805
884-6323
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