[c-nsp] OSPF LSA Type 3 / 5 question ...

[Fabio Mendes]

An even simpler way to do it is to suppress the announcement of the /24 to
area 0 and leave only the IA.

The 10.100 network is already behind the 10.0.0.0/8 summary and it's
reachable through the same ABR generating that IA summary.




On Thu, Feb 2, 2017 at 9:20 PM, Fabio Mendes <fabio.mendes at bsd.com.br>
wrote:

> the full command to summarize external LSA is summary-address, it wasn't
> very clear on my last email
>
> On Thu, Feb 2, 2017 at 9:16 PM, Fabio Mendes <fabio.mendes at bsd.com.br>
> wrote:
>
>> If I understood correctly you are generating an IA LSA via the area range
>> command on the ABR and are also receiving a E1/2 LSA for a /24 that is part
>> of the IA range and want to mask it behind that same IA LSA.
>>
>> One simple way to do it is use the summary command under the ospf
>> process, announcing a 10.0.0.0/8 to the backbone area.
>>
>> Now the backbone has an IA for 10.0.0.0/8 and a E1/2 for the same prefix.
>>
>> In that case the IA will be preferred.
>>
>> Since the 10.100 subnet is behind the same ABR that's generating the
>> 10.0.0.0/8 IA into the backbone, you will not have any connectivity
>> problems by doing that.
>>
>>
>>
>