>Hello guys,
>
>Mark is right, you can designate any other area as the backbone
>area. I configured a hub router with area 1 and two spoke routers
>with area 2 and 3, with each spoke a link to area 1. Works 100% ok,
>full routing table, full reachability.
>
>Regards,
>
>Georg
But is the source of the route in the routing table directly connected or
OSPF?
If I have
R2 (A2)-------R1 (A1)--------R3 (A3)
you will have connectivity in R1 because the routes are directly
connected, overriding OSPF. A general router interface will not form
an adjacency with an interface in a different area. Do the connected
routers appear in a show ip ospf neighbor command?
Does R2 see R3 and vice versa, without default routes? What LSDB
entries exist for the R2-R1 link and the R1-R3 link? If OSPF is
doing this, not other routing mechanisms, there should be entries in
R1 for each link, but R2 and R3 should only have their own link.
>
>>From: Joe
>>Reply-To: Joe
>>To: "'Mark Miller'" , "'Sam Munzani'"
>>, [EMAIL PROTECTED]
>>CC: [EMAIL PROTECTED]
>>Subject: RE: Can you have OSPF without area 0 at all?
>>Date: Mon, 17 Feb 2003 14:34:56 -0500
>>
>>Please send us the link you refer to. I have to say that this is simply
>>not true. You will ONLY send routes from your area, whatever it may be,
>>into area 0, the backbone, so you can't just arbitrarily designate any
>>area as the backbone. It MUST be area 0.
>>
>>Joe
>>
>>-----Original Message-----
>>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
>>Mark Miller
>>Sent: Friday, February 14, 2003 6:15 PM
>>To: Sam Munzani; [EMAIL PROTECTED]
>>Cc: [EMAIL PROTECTED]
>>Subject: Re: Can you have OSPF without area 0 at all?
>>
>>
>>The routing process in ospf has no concept that "area 0" is the backbone
>>area. You can make it any number you want. I remember reading
>>something on this. I'll try to dig it up and send you a link.
>>
>>Mark Miller
>>
>>
>>----- Original Message -----
>>From: "Sam Munzani"
>>To:
>>Cc:
>>Sent: Friday, February 14, 2003 12:56 PM
>>Subject: Can you have OSPF without area 0 at all?
>>
>>
>>> Team,
>>>
>>> I came across an interesting finding. I want to take everybody's
>>> opinion
>>on this before putting anything in production. We are building an OSPF
>>network that will eventually merge with company's main OSPF backbone
>>network. The core group has assigned us ospf area number 555.
>>>
>>> When I configure all my routers with OSPF area 555(with no area 0 at
>>> all),
>>it seems to be building up routing table. I always thought OSPF needs
>>area 0 to function. Will this work of we add a non cisco device with
>>area 555 configuration?
>>>
>>> What is the catch 22 in this configuration? I have started reading
>>> OSPF
>>RFC to figure out all technical details.
>>>
>>> Thanks,
>>> Sam Munzani
>
>
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