[j-nsp] ABR exit to NSSA routes

[Amr Mahmoud]

Hi Alan,

The problem is that whatever summary (shortest match or longest match) you
do on the lower RID ABR has no effect because Highest RID is the only
router that performs LSA7-LSA5 translation into Backbone area. area-range
take effect only when done on Highest RID ABR. There is no LSA5 seen in
backbone area at all from lowest RID (regardless if area-range is
configured on it or not). I wish you try it and notice it yourself.

Warm Regards,

On Mon, Nov 24, 2014 at 11:23 AM, Alan Gravett <alangra at gmail.com> wrote:

> Ok...no longer mobile, so easier to write more detail...
>
> First a few assumptions - the routes you are trying to summarize are all
> learned from the ASBR?
> (so type-7 LSA)
>
> If the IPv4 Summary route is 198.100.0/19, then try the following:
>
> On R1:
> set protocols ospf area 55 nssa area-range 198.100.0/19
> set protocols ospf area 55 nssa area-range 198.100.0/20 ---> longest match
> lookup
>
> On R3:
> set protocols ospf area 55 nssa area-range 198.100.0/19
> set protocols ospf area 55 nssa area-range 198.100.16/20  ---> longest
> match lookup
>
> Can you try this and let me know if it works?
>
> If it does do the same thing for IPv6!
>
> Hope this helps...
>
> Alan
>
> On Mon, Nov 24, 2014 at 9:52 AM, Alan Gravett <alangra at gmail.com> wrote:
>
>> This is something I have never tried, but can you try splitting your
>> summary and advertising both out each?
>> On 24 Nov 2014 09:49, "Amr Mahmoud" <amr.masoud at gmail.com> wrote:
>>
>>> Thanks Alan for your reply,
>>>
>>>  But using area-range restrict will not provide failover to the
>>> non-prefered ABR when preferred ABR fails. Sorry, I had to mention in my
>>> question that failover is required.
>>>
>>> Is there any way to configure different router-id for OSPFv3 (in the
>>> same routing instance) ?
>>>
>>> Best Regards,
>>> Amr Masoud
>>>
>>> On Mon, Nov 24, 2014 at 7:58 AM, Alan Gravett <alangra at gmail.com> wrote:
>>>
>>>> Try area-range xxxx/y restrict on one abr and the same for ipv6 summary
>>>> route with restrict keyword on the other abr
>>>> On 24 Nov 2014 06:48, "Amr Mahmoud" <amr.masoud at gmail.com> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>>
>>>>>
>>>>> I have R10 as ASBR in NSSA area#10 , R1 & R3 are two ABRs between
>>>>> area#10
>>>>> and backbone area. R2 is in backbone area equally dual connected to
>>>>> both R1
>>>>> & R3. I need to let R1 be prefered by R2 for IPv4 external routes
>>>>> advertised by R10. and to let R3 be prefered by R2 for IPv6 external
>>>>> routes
>>>>> advertised by R10. I also need to summarize NSSA routes to backbone
>>>>> area.
>>>>>
>>>>>
>>>>>
>>>>> The problem I am facing is that both OSPFv3 & OSPFv2 are using the same
>>>>> RID. R3 has the highest RID and it performs LSA7-LSA5 translation for
>>>>> both
>>>>> OSPFv2(IPv4) & OSPFv3(IPv6) . So R2 always points to R3 for both IPv4 &
>>>>> IPv6 external routes originated by R10 regardless of any nasa
>>>>> area-range
>>>>> configuration done on R1.
>>>>>
>>>>>
>>>>> Amr,
>>>>> _______________________________________________
>>>>> juniper-nsp mailing list juniper-nsp at puck.nether.net
>>>>> https://puck.nether.net/mailman/listinfo/juniper-nsp
>>>>>
>>>>
>>>
>