Re: Ospf lsa filtering command.

Ok, there are even more options as Narbik would put it..

1)interface level ip ospf database-filter all out
2)neighbor x.x.x.x database-filter all out [cost]

Then there, is the

3) area 1 filter-list prefix prefix-list-name in/out
4) use the area 1 range x.x.x.x y.y.y.y no-advertise on the abr
5) use the summary-address x.x.x.x y.y.y.y no-advertise command on the asbr.

And finally we, have the distribute-lists, if you want to filter the routes
from your local routing table! :D

Regards,
Andy H.

On Wed, Jun 3, 2009 at 8:34 PM, ALL From_NJ <all.from.nj_at_gmail.com> wrote:

> Good comments on that ...
>
> I had a lab and it said " the 10/8 network should not come into are 6". I
> used that command on the ABRs to filter these routes and keep that network
> out of area 6.
>
> Nice comments!
>
>
>
> On Tue, Jun 2, 2009 at 9:56 PM, Piyoush Sharma <piyoush_at_gmail.com> wrote:
>
>> For any LSA filtering (of a specific network type) you can use area filter
>> command, when the routes are flooded into another area (in backbone area
>> from, say, area 2). This filter can be applied inbound or outbound, based on
>> the requirements.
>>
>> Piyoush
>>
>>
>> On Tue, Jun 2, 2009 at 12:31 PM, Andy Hogard <andyhogard_at_gmail.com>wrote:
>>
>>> Thanks a lot! Will sit on it in some time. :)
>>>
>>> On Wed, Jun 3, 2009 at 12:35 AM, ALL From_NJ <all.from.nj_at_gmail.com>
>>> wrote:
>>>
>>> > Here is the doc cd in which it describes when you might use this
>>> command
>>> > (watch the ugly word wrap)
>>> >
>>> >
>>> >
>>>
>>> http://www.cisco.com/en/US/docs/ios/iproute/configuration/guide/irp_ospf_cfg_
>>> ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1054763<http://www.cisco.com/en/US/docs/ios/iproute/configuration/guide/irp_ospf_cfg_%0Aps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1054763>
>>> >
>>> > From this link:
>>> >
>>> > You can block OSPF flooding of LSAs two ways, depending on the type of
>>> > networks:
>>> >
>>> > On broadcast, nonbroadcast, and point-to-point networks, you can block
>>> > flooding over specified OSPF interfaces.
>>> >
>>> > On point-to-multipoint networks, you can block flooding to a specified
>>> > neighbor.
>>> >
>>> > So the command you would use would depend on the interface type and
>>> what
>>> > you are trying to do.
>>> >
>>> > I saw a caveat related to testing this feature, and this was that I
>>> > sometimes needed to manually clear the OSPF process on the spoke
>>> router,
>>> > even if the router had bounced the neigh relationship itself, it still
>>> would
>>> > required a clear from me.
>>> >
>>> > Seems to me this is a command to use for your spokes where they have
>>> only
>>> > one path. I note of caution for this ... if using this towards your
>>> spokes,
>>> > this command also blocks a default route LSA that you may be using for
>>> a
>>> > default route. HTH,
>>> >
>>> > Andrew Lee Lissitz
>>> >
>>> >
>>> >
>>> > On Tue, Jun 2, 2009 at 2:15 PM, Andy Hogard <andyhogard_at_gmail.com>
>>> wrote:
>>> >
>>> >> Also, it works under the network type of "point-to-multipoint
>>> >> non-broadcast"
>>> >> as it requires the neighbor command as well!
>>> >>
>>> >> :)
>>> >>
>>> >> On Tue, Jun 2, 2009 at 11:39 PM, Andy Hogard <andyhogard_at_gmail.com>
>>> >> wrote:
>>> >>
>>> >> > Arg!!
>>> >> >
>>> >> > "R2#conf t
>>> >> > Enter configuration commands, one per line. End with CNTL/Z.
>>> >> > R2(config)#router ospf 1
>>> >> > R2(config-router)#neighbor 131.1.23.3 database-filter all out
>>> >> > OSPF: Neighbor command is allowed only on NBMA and
>>> point-to-multipoint
>>> >> > networks
>>> >> > R2(config-router)#"
>>> >> >
>>> >> > Got it!! :D
>>> >> >
>>> >> > On Tue, Jun 2, 2009 at 11:30 PM, Andy Hogard <andyhogard_at_gmail.com>
>>> >> wrote:
>>> >> >
>>> >> >> Hi,
>>> >> >>
>>> >> >>
>>> >> >> Was wondering ..with what ospf network types does, "neighbor
>>> 131.1.23.3
>>> >> >> database-filter all out" command work?! Are there any caveats to
>>> watch
>>> >> out
>>> >> >> for, eh?
>>> >> >>
>>> >> >>
>>> >> >> Greets,
>>> >> >> Andy H.
>>> >> >>
>>> >> >> --
>>> >> >> My Blog URL: http://ccielog.blogspot.com/
>>> >> >>
>>> >> >
>>> >> >
>>> >> >
>>> >> > --
>>> >> > My Blog URL: http://ccielog.blogspot.com/
>>> >> >
>>> >>
>>> >>
>>> >>
>>> >> --
>>> >> My Blog URL: http://ccielog.blogspot.com/
>>> >>
>>> >>
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>>> >>
>>> >>
>>> >>
>>> >>
>>> >
>>> >
>>> > --
>>> > Andrew Lee Lissitz
>>> > all.from.nj_at_gmail.com
>>> >
>>>
>>>
>>>
>>> --
>>> My Blog URL: http://ccielog.blogspot.com/
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>>>
>>
>
>
> --
> Andrew Lee Lissitz
> all.from.nj_at_gmail.com
>

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