Re: OSPF LSA type 3 filtering

Sara, as far as I know it works in this way:

with the first option, the filter-list you can filter only lsa type 3 and
this filtering only affects the local routing table, not the OSPF database.

with the second option you are filtering every LSA type but this filtering
affect the OSPF database, therefore also the local routing table.

There is another option that applies to route summarization when
distributing routes into OSPF. This also has the feature "not-advertise",
and the syntax is: summary-address ip-prefix summary-mask [not-advertise]

I hope someone else can add more details.

On Wed, Jan 2, 2013 at 5:16 AM, Sarad <tosara_at_gmail.com> wrote:

> Hi Experts,
>
> Can somebody help me to get my head around this, I've been labbing ospf
> type 3 filtering, Main method use for this is filter-list command. Which we
> can use to filter route based on the direction (in /out)
>
>
>
> Then there is area range command with not-advertise switch we can use to do
> limited filtering on ABR. When I tested this it only works when I filter
> LSA type 3 from non backbone area to a backbone area.
>
> Can somebody help me to explain what is the exact usage of this command in
> term of filtering in OSPF. There is nothing much in the doc CD
>
> *
> *
> *area area-id filter-list prefix prefix-list-name {in | out}
> area* area-id *range* ipv6-prefix /prefix-length [*advertise* | *
> not-advertise*] [*cost* cost]
>
>
> Cheers
> Sara
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>

-- 
@ccie99999
Blogs and organic groups at http://www.ccie.net