From: Paul Borghese (pborghese@xxxxxxxxxxxxxx)
Date: Mon Mar 04 2002 - 12:18:16 GMT-3
Ugh, of course! This is something that I seem to need to re-learn about
once a year. Thanks for the help! Now if only I can get my EIGRP
authentication to reliably work....
Paul
----- Original Message -----
From: "Jaeheon Yoo" <kghost@chollian.net>
To: "ccielab" <ccielab@groupstudy.com>; "John Neiberger" <neiby@ureach.com>
Sent: Sunday, March 03, 2002 7:22 PM
Subject: Re: distribution lists in RIP
> Yes, this is intuitively very confusing.
> So, I always think this command by adding "of" before a routing protocol.
>
> distribute-list 1 out (of) ospf 1
> <<-------------
>
> distribute-list 1 out int serial 0
> --------->>
>
> Jaeheon,
>
> ----- Original Message -----
> From: "John Neiberger" <neiby@ureach.com>
> To: "Paul Borghese" <pborghese@groupstudy.com>; <ccielab@groupstudy.com>
> Sent: Monday, March 04, 2002 7:34 AM
> Subject: Re: distribution lists in RIP
>
>
> >
> > This is one of those things that confuses me all the time.
> >
> > > router rip
> > > distribute-list 1 out ospf 1
> >
> > Intuitively, at least to me, this says to filter RIP routes
> > that match access-list 1 when redistributing to OSPF 1.
> > However, I don't think that's what it really does.
> >
> > I think it means "When redistributing routes from OSPF 1 into
> > RIP, filter out routes that match access list 1 before sending
> > them to other RIP neighbors." If I'm wrong I hope someone will
> > correct me.
> >
> > Regards,
> > John
> >
> >
> > ---- On Sun, 3 Mar 2002, Paul Borghese
> > (pborghese@groupstudy.com) wrote:
> >
> > > I have a configuration where I would like to redistribute
> > from RIP to
> > > OSPF.
> > > I would prefer to apply a filter to limit my distributions.
> > I am
> > > running
> > > RIP on an ethernet interface and OSPF on a serial interface.
> > When I
> > > apply
> > > the command:
> > >
> > > router rip
> > > distribute-list 1 out ospf 1
> > >
> > > It filters the RIP updates out the ethernet interface. So
> > the router
> > > seems
> > > to ignore the fact that I told it to only filter when
> > redistrbuting into
> > > OSPF and instead filters regular rip updates. Here is some
> > debugging
> > > output:
> > >
> > > Before applying distribute-list 1 out ospf:
> > > --------------------------------------------------------------
> > ------
> > > 02:24:10: RIP: sending v1 update to 255.255.255.255 via
> > Ethernet0
> > > (190.27.2.3)
> > > 02:24:10: RIP: build update entries
> > > 02:24:10: network 87.0.0.0 metric 7
> > > 02:24:10: network 180.70.0.0 metric 7
> > > 02:24:10: subnet 190.27.1.0 metric 7
> > > 02:24:10: subnet 190.27.10.0 metric 7
> > > 02:24:10: subnet 190.27.11.0 metric 7
> > > --------------------------------------------------------------
> > -----------
> > >
> > > Notice there are a number of routes being advertised out E0.
> > >
> > > Now I will apply the command:
> > > --------------------------------------------------------------
> > --------------
> > > --
> > > R7(config-router)#router rip
> > > R7(config-router)#distribute-list 1 out ospf 1
> > > R7(config-router)#
> > > 02:24:15: RIP: Distribute-list changed: sending triggered
> > update
> > > R7(config-router)#
> > > 02:24:35: RIP: sending v1 update to 255.255.255.255 via
> > Ethernet0
> > > (190.27.2.3)
> > > 02:24:35: RIP: build update entries - suppressing null update
> > > --------------------------------------------------------------
> > --------------
> > > --------
> > >
> > > Notice the update did not have any entries. So the command
> > > distribute-list
> > > 1 out ospf 1 blocks routes from leaving the ethernet
> > interface.
> > >
> > > Why?
> > >
> > > Paul Borghese
> > >
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