RE: OSPF STUB/TOT-STUB

From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Fri Sep 05 2003 - 13:13:38 GMT-3

Raj,

        Yes, that is the correct way to configure a totally stubby area.
All devices within the area must agree on the stub or nssa flag. It is
the ABR that determines whether the area is totally stubby or not so
totally stubby. These variations are as follows

Stub 

----
ABR: area 1 stub
Area routers: area 1 stub

Totally Stubby
--------------
ABR: area 1 stub no-summary
Area routers: area 1 stub

Not So Stubby
-------------
ABR: area 1 nssa
Area routers: area 1 nssa

Not So Totally Stubby
---------------------
ABR: area 1 nssa no-summary
Area routers: area 1 nssa

HTH,

Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com 

Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-334-8987
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-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
John Matijevic
Sent: Friday, September 05, 2003 10:31 AM
To: Rajagopal S; ccielab@groupstudy.com
Subject: Re: OSPF STUB/TOT-STUB

Hello Rajagopal,
I believe you have configured a totally stubby area, when you configure
this
you only configure one-side with the no-summary command.
Sincerely,
Matijevic
----- Original Message ----- 
From: "Rajagopal S" <raj_ccie@yahoo.com>
To: <ccielab@groupstudy.com>
Sent: Friday, September 05, 2003 10:59 AM
Subject: OSPF STUB/TOT-STUB

> Hi group,
> I noticed a strange thing today...
>
> I was practicing on OSPF STUB and TOTALLY stub araes. I have 2 routers
connected on a point to point FR link.
>
> All characteristics of stub and totally stub are working fine.
>
> I changed the configurations of the routers such that one router was
configured for stub and another for totally-stub.
>
> I had changed the router's configs as below:
>
> Router - A :
>
> router ospf 1
>  log-adjacency-changes
>  area 1 stub no-summary
>
> Router - B:
> router ospf 1
>  log-adjacency-changes
>   area 1 stub
>
>
> Even after this, the OSPF neighbor relation was on and routing
information
was like as a Stub area in Router - A. Is this possible ? Is it
documented ?
>
> how can a stub and a totally stub area talk ? arent the stub fields
different for these?
>
> Cheers
> Raj
>
>
>
> ---------------------------------
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>
>

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