Re: Ospf lsa filtering command.

I forgot filtering using the distance option, works under all the
protocols!! :)

Cheers!

On Wed, Jun 3, 2009 at 8:45 PM, Andy Hogard <andyhogard_at_gmail.com> wrote:

> 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/
>>>> >>
>>>> >>
>>>> >> Blogs and organic groups at http://www.ccie.net
>>>> >>
>>>> >>
>>>> _______________________________________________________________________
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>>>> >>
>>>> >>
>>>> >>
>>>> >>
>>>> >>
>>>> >>
>>>> >>
>>>> >
>>>> >
>>>> > --
>>>> > Andrew Lee Lissitz
>>>> > all.from.nj_at_gmail.com
>>>> >
>>>>
>>>>
>>>>
>>>> --
>>>> My Blog URL: http://ccielog.blogspot.com/
>>>>
>>>>
>>>> Blogs and organic groups at http://www.ccie.net
>>>>
>>>> _______________________________________________________________________
>>>> Subscription information may be found at:
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>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>
>>
>> --
>> Andrew Lee Lissitz
>> all.from.nj_at_gmail.com
>>
>
>
>
> --
> My Blog URL: http://ccielog.blogspot.com/
>

-- 
My Blog URL: http://ccielog.blogspot.com/
Blogs and organic groups at http://www.ccie.net