From: Victor (cisco.all.stuff@gmail.com)
Date: Sun Mar 08 2009 - 19:54:03 ARST
Thank you Everybody for your help.
Now it looks clear (make sense) :-)
Cheers.... Johan Victor
On Sun, Mar 8, 2009 at 5:32 PM, Sharma, Praveen <Praveen.Sharma@spansion.com
> wrote:
>
>
>
> Q. Can I use the distribute-list in/out command with OSPF to filter
> routes?
>
> A. The distribute-list commands are supported in OSPF but work
> differently than distance-vector routing protocols such as Routing
> Information Protocol (RIP) and Enhanced Interior Gateway Routing
> Protocol (EIGRP). OSPF routes cannot be filtered from entering the OSPF
> database. The distribute-list in command only filters routes from
> entering the routing table; it does not prevent link-state packets from
> being propagated. Therefore, this command does not help conserve router
> memory, and it does not prohibit a router from propagating filtered
> routes to other routers.
>
> Caution: Use of the distribute-list in command in OSPF may lead to
> routing loops in the network if not implemented carefully.
>
> The command distribute-list out works only on the routes being
> redistributed by the Autonomous System Boundary Routers (ASBRs) into
> OSPF. It can be applied to external type 2 and external type 1 routes,
> but not to intra-area and interarea routes.
>
>
>
> HTH
>
> Praveen
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Victor
> Sent: Sunday, March 08, 2009 10:34 AM
> To: Cisco certification; Cisco certification
> Subject: OSPF distribute list - Lab study
>
> Hello
>
> A distribute list INBOUND in OSPF avoids the route from entering local
> RIB
> but doesn't stop LSAs propagation. I tried to use a distribute list
> OUTBOUND
> and results are: routes still in IP routing table and still LSAs being
> propagated.
>
> Is there anyone than can explain me the effect of distribute list in
> OSPF??
>
> Sorry if it seems an stupid question. Thanks in advance and Brgds.....
> Johan
>
>
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