From: André Bersvendsen (an-bersv@xxxxxxxxx)
Date: Sun Apr 07 2002 - 06:34:27 GMT-3
Jim,
You are right about that OSPF suppresses hellos if you use
passive-interface. But you can bring up an adjacency with neighbor
statements. All LSA's will then be exchanged between the routers.
So if the goal is to not send out any LSA's then a filter is better.
On broadcast and NBMA networks you can configure the filter on the
interface like this:
(config-if)#ip ospf database-filter all out
The above filter is used for multicast based OSPF.
If you are using neighbor statements under the OSPF process then you
must configure the filter on the neighbor statement (unicast based
OSPF).
Regards,
Andri Bersvendsen
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Jim Newton
Sent: 5. april 2002 17:25
To: John Neiberger; Phil; Larry Whitfill ; ccielab@groupstudy.com
Subject: RE: Re: OSPF LSA's
Maybe this would be good if you didn't want to advertise out a certain
interface, but still wanted it to form an adjacency and receive routes.
If I
am not mistaken, passive-interface also suppresses hellos. But at this
point
I may very well be wrong, as my brain is really fried lately.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
John
Neiberger
Sent: Friday, April 05, 2002 7:46 AM
To: Phil; Larry Whitfill ; ccielab@groupstudy.com
Subject: Re: Re: OSPF LSA's
Sure. If you add an interface to OSPF using a network
statement and then make it passive, that network gets
advertised into OSPF but no OSPF packets will leave that
particular interface.
John
---- On Fri, 5 Apr 2002, =?iso-8859-1?q?Phil?=
(ciscostudent1@yahoo.com.br) wrote:
>
> John,
> Can you use passive-interface with OSPF?
> Phil
>
> John Neiberger <neiby@ureach.com> escreveu: Why would you
want to run
> OSPF on an interface, only to deny
> all LSAs from crossing the link? Perhaps the passive-
interface
> command would be your friend?
>
> Then again, do you want hellos to pass? Then use the database
> filter command. Again, I must ask...why? why?? WHY??? :0)
>
> John
>
>
>
> ---- On Thu, 4 Apr 2002, Larry Whitfill (whitfill@cox.net)
> wrote:
>
> > I'm trying to control LSA flooding.
> >
> > If I create a totally stubby area in OSPF, I block all but
> type 1, and 2
> > LSAs (plus a single type 3). Using the "area filter list,"
I
> assume we
> > can
> > block even the default type 3 LSA. Is there a way to block
> even types 1
> > and
> > 2 without using the "OSPF database filter" command?
> >
> > I've been racking my brain for a month and haven't found a
> good
> > solutions.
> >
> > Thanks for the help!
> >
> > Larry
> >
>
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