Re: Distribute-list

Here is in example. Using "out ospf" under EIGRP filter routes from OSPF
into EIGRP. The syntax is not very intuitive.

http://ccietobe.blogspot.com/2008/11/redistribution-filtering-with.html

On Sun, Jul 12, 2009 at 11:27 AM, Roy Waterman <roy.waterman_at_gmail.com>wrote:

> Malik
> The distribute list is under eigrp 100 and it is applied OUTBOUND into ospf
> 1
>
> Example B:
> router eigrp 100
> redistribute ospf 1 metric 1 1 1 1 1
> distribute-list 5 out ospf 1
> !
> access-list 5 permit 10.10.10.0
>
> Now, as far as I am aware, the above says:
>
> permit only 10.10.10.10 to go into ospf 1, from eigrp 100.
> However, OSPF needs to have:
>
> router ospf 1
> redistribute eigrp 100 subnet ...
>
> in order for OSPF to KNOW that it needs to redistribute eigrp 100 routes
> in,
> namely the 10.10.10.10.
> EIGRP is saying to OSPF..ok you want to redistribute? Here Ill just give
> you
> 10.10.10.10.
>
> G2, test out these scenarios that you mentioned, & then you will understand
> how things work.
>
> Regards
> Roy
>
>
>
> What the above means is, only permit
>
> 2009/7/12 S Malik <ccie.09_at_gmail.com>
>
> > distribute-list 5 out F1/0 means permit outgoing routes on interface F1/0
> > permitted by ACL5.
> >
> > distribute-list 5 out ospf 1 Means permit routes referenced in ACL5 which
> > are sourced from OSPF1.
> >
> >
> >
> >
> >
> > On Sat, Jul 11, 2009 at 4:03 PM, G2 <farawayguy_at_gmail.com> wrote:
> >
> > > I guess my question was not very clear. Let me try to rephrase it.
> > >
> > > I am looking for some clarification on the differences between using a
> > > distribute with the following two syntaxes:
> > >
> > > Example A:
> > > router eigrp 100
> > > redistribute ospf 1 metric 1 1 1 1 1
> > > distribute-list 5 out F1/0
> > > !
> > > access-list 5 permit 10.10.10.0
> > > !
> > >
> > > VERSUS
> > >
> > > Example B:
> > > router eigrp 100
> > > redistribute ospf 1 metric 1 1 1 1 1
> > > distribute-list 5 out ospf 1
> > > !
> > > access-list 5 permit 10.10.10.0
> > > !
> > >
> > >
> > >
> > > Any good documentation would be great.
> > >
> > > Thanks,
> > >
> > >
> > >
> > > On Jul 11, 2009, at 8:42 PM, Darby Weaver wrote:
> > >
> > > > It's a question on whether you want to permit/allow traffic at the
> > > > interface level or at the process level. It becomes a question of
> > > > granularity and/or where one wants to influence traffic. Let's find
> > > > some freebie examples.
> > > >
> > > > And note that if used at the process level - consider the gateway
> > > > option to filter updates from a certain entry point.
> > > >
> > > > Here's a step-by-step example on using a distribute-list under a
> > > > process versus an intrerface.
> > > >
> > > >
> > >
> >
> http://www.petri.co.il/how-to-use-a-distribute-list-to-filter-out-routing-updates-in-cisco-ios.htm
> > > >
> > > > This example may offer a little more insight too, but read carefully
> > > > as the material is a bit dated:
> > > >
> > > >
> > >
> >
> http://books.google.com/books?id=oBWU-q9Ovg8C&pg=PA159&lpg=PA159&dq=distribute-list+cisco&source=bl&ots=BB3j3ez_pU&sig=_Sipi1rVIcWthp6qZNyQs_k1nB8&hl=en&ei=_stYSuHGLJT7tgex6PndCg&sa=X&oi=book_result&ct=result&resnum=10
> > > >
> > > > Some things to keep in mind:
> > > >
> > > >
> > > > http://www.911networks.com/index.php/Cisco/RedistDistLists
> > > >
> > > >
> > > > On Sat, Jul 11, 2009 at 9:54 AM, G2 <farawayguy_at_gmail.com> wrote:
> > > > Does anyone have any good documentation or explanation on distribute-
> > > > list being used via routing process vs the physical interface?
> > > >
> > > > Thanks,
> > > > Gary
> > > >
> > > >
> > > > Blogs and organic groups at http://www.ccie.net
> > > >
> > > >
> _______________________________________________________________________
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> >
> >
> >
> >
> >
>
>
> --
> Regards
> Roy
>
>
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-- 
Bryan Bartik
CCIE #23707 (R&S), CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com
Blogs and organic groups at http://www.ccie.net