Re: 3 OSPF non-zero areas

I think Anantha is really going "outside the box" here as he has NO
area 0 at all.

It is really late for me, but I am thinking the only time we can go
without an Area 0 in OSPF is when we only have a single area.

Warmest Regards,

Anthony J. Sequeira, CCIE #15626
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On May 6, 2009, at 1:01 AM, Roy Waterman wrote:

> Sorry what i meant to say was:
>
> You can create a virtual link to extend area 0 to area 4, and then
> create a
> 2nd virtual link to extend area 0 (which was extended to area 4) to
> area 5.
>
> 2009/5/6 Roy Waterman <roy.waterman_at_gmail.com>
>
>> 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
>>
>
>
>
> --
> Regards
> Roy
>
>
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Received on Wed May 06 2009 - 01:28:52 ART