Re: 3 OSPF non-zero areas

Hi Anantha
You can create a virtual link to extend area 0 to area 4, and then create a
2nd virtual link to extend area4 to area 5.

2009/5/6 Anantha Subramanian Natarajan <anantha.natarajan_at_gravitant.com>

> Hi All,
>
> Is it possible to run OSPF when there are three OSPF areas as shown below
> and none of them is not a area 0.
>
> R1 --ospf area3 --R2 ---ospf area4 ---R3 ----ospf area5 --R4
>
> My understanding is that, virtual-link would be only useful when to join a
> non-zero area to connect to area0 which is seperated by another
> non-zero area.Also the virtual links would be useful in case where area 0
> is
> broken in between a non-zero area.Assuming my above understanding is
> right,I
> am thinking the above scenario will not be able to use virtual links to
> propagate OSPF routes among R1,R2,R3,R4.
>
> In this case,if I would be able to build GRE tunnel between
> R1-R2,R2-R3,R3-R4 and run OSPF on area0 over them,In that case,will the
> OSPF
> routes would be able to get propagated ?
>
> Thanks for the help
>
> Regards
> Anantha Subramanian Natarajan
>
>
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Regards
Roy
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