Re: preferring OSPF inter-area compared to intra-area

Argh, I forgot to apply my talk to early supressors... now I see that R3
is twice in your diagram.
OSPF needs same DB on all same area routers. So what are your extended
requirements ? May be running 2 copies of OSPF at R3 ?
Filtering that route from OSPF and running another proto ?

-Carlos

Carlos G Mendioroz @ 07/01/2013 07:19 -0300 dixit:
> 10^6-1,
>
> Do you have a link between R3 and SW1 that you forgot to mention ?
> Cause if not, even though R3 lo is in "area 2", that would be "another"
> area 2 compared to R3-SW1-R6.
>
> -Carlos
>
> ccie99999 @ 07/01/2013 01:41 -0300 dixit:
>> hello everybody..
>>
>> I've decided to drop this question here in Gs since I'm confused and not
>> able to understand this scenario.
>>
>> I would like to filter an OSPF intra-area route in this scenario.
>>
>>
>> =============VL0===VL1=
>> 22222222222211111444444
>> R3 - SW1 - R6 - R1 - R3
>>
>> from R3 to R6 there is Area2
>> from R6 to R1 there is Area1
>> from R1 to R3 there is Area4
>> R1, R3 and others are in Area0
>> There is a VL between R6 to R1 and from R1 to R3
>>
>> R3 LO is on Area2.
>> What I want to do is configure some filtering in R6 that allows me to
>> reach
>> R3 L0 through path R6->R1->R3
>> Without filtering I reach R3 L0 via R6->SW1->R3 since it's an intra-area
>> route.
>> If I shut down the link between R6 and SW1 I can reach R3 L0 via
>> R6->R1->R3 (this is an inter-area route and this means VLs are working)
>> my requirement: I want to filter on R6 so I would prefer inter-area
>> instead
>> of intra-area.
>> As far as I know I cannot use :
>>
>> - area x range command: since this filters type3 between areas
>> - distribute-list: since I've to filter based on a source also and I
>> cannot
>> do with it
>> - only valid solution looks using a route-map matching prefix-list and
>> something else.
>> - I've tried this solution matching prefix list R3 L0 and ip
>> route-source
>> and doesn't work
>> - I've tried same as above but matching interface (interface
>> between R3
>> and SW1)
>> - I've tried same as above but matching a tag but I don't
>> understand how
>> to tag a route 'out' with ospf.
>>
>>
>> Is there something easier to filter this type 1 LSA into R6? Or to prefer
>> inter area compared to intra ones?
>>
>> thanks
>>
>>
>>
>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net