From: John (veryconnected@xxxxxxxxx)
Date: Wed May 10 2000 - 13:55:07 GMT-3
it really depends on the type of area
on the other side of the ABR
you could config a stub area to kill exteranl
type e1 and e2 routes from entering
no summary to kill summary routes
and NSSA if redistributing a protocol
that you want to filter.
if its a regular area you can't filter routes
--- Kevin Young <kvyoung@sina.com> wrote:
> yes, i agree with you.
>
> ----- Original Message -----
> From: John Conzone <jkconzone@home.com>
> To: Kevin Young <kvyoung@sina.com>
> Cc: ccielab <ccielab@groupstudy.com>
> Sent: Wednesday, May 10, 2000 8:12 PM
> Subject: Re: OSPF route filtering on ABRs...now I'm
> confused(again)
>
>
> > So, same PID, send LSA's, ditribute list has
> no effect on LSA, just
> > routes.
> > Different PID's, routes are exchanged, not
> LSA's, so OSPF 10 thinks OSPF
> > 20 is another protocol, sends routes, and
> distribute list work? Does
> > thatmean OSPF 10 and OSPF 20 don't see each others
> LSA's?
> > Hmmmmmmmmm. I will most defintely read up on
> that!
> >
> > ----- Original Message -----
> > From: "Kevin Young" <kvyoung@sina.com>
> > To: "John Conzone" <jkconzone@home.com>
> > Cc: "ccielab" <ccielab@groupstudy.com>
> > Sent: Wednesday, May 10, 2000 7:53 AM
> > Subject: Re: OSPF route filtering on ABRs...now
> I'm confused(again)
> >
> >
> > > yeah, ospf recognize the different pid's in the
> same AS and allows you to
> > filter.
> > >
> > > Routing TCP/IP Volume1 p771-780 has wonderful
> description.
> > > when use distribute-list xx out interface is
> meaningless under link state
> > protocol because LS doesn't advertise route to its
> neghbor but LSAs, route
> > filters have no effect on LSAs. but
> distribute-list xx out protocol done, it
> > means allow ospf to advertise routes which
> discovered by other protocol .
> > >
> > >
> > >
> > > **************************************
> > > Kevin Young
> > > Senior Network Engineer
> > > Yinxi Electronic Information Co.,Ltd
> > > (86)-10-82625798 x 810
> > > **************************************
> > >
> > > ----- Original Message -----
> > > From: John Conzone <jkconzone@home.com>
> > > To: Goh, Winston <winston.goh@sg.unisys.com>;
> 'Kevin Young'
> > <kvyoung@sina.com>; <ccielab@groupstudy.com>
> > > Sent: Wednesday, May 10, 2000 7:35 PM
> > > Subject: Re: OSPF route filtering on ABRs...now
> I'm confused(again)
> > >
> > >
> > > > Okay, now I'm confused.
> > > > Reading Caslow last night said the OSPF
> process-id was only locally
> > > > significant. I took that to mean that as long
> as you had OSPF routers
> > > > touching the same area 0 they were in the same
> AS, regardless of process
> > ID
> > > > number.
> > > > To have a seperate OSPF AS, you'd need
> another routing protocol
> > > > isolating them, say BGP. That was my take,
> anyway. I didin't know you
> > could
> > > > filter routes bewteen routers in the same AS,
> regardless of pid.
> > > > OSPF recognize the different pid's in the
> same AS and allows you to
> > > > filter?
> > > > Winston, please explain "during
> redistribution, distribution-list
> > will
> > > > filter the route since routes are injected
> into the opsf but not the
> > > > link-states"
> > > > Has anyone actually tried this?
> > > > Thanks.
> > > >
> > > >
> > > >
> > > > John
> > > >
> > > > ----- Original Message -----
> > > > From: "Goh, Winston"
> <winston.goh@sg.unisys.com>
> > > > To: "'Kevin Young'" <kvyoung@sina.com>;
> <ccielab@groupstudy.com>
> > > > Sent: Wednesday, May 10, 2000 6:40 AM
> > > > Subject: RE: OSPF route filtering on ABRs...
> > > >
> > > >
> > > > > Hi,
> > > > > i think Mohan is not running 2 ospf process.
> if you are running 2 ospf
> > > > > process, of course , during redistribution,
> distribution-list will
> > filter
> > > > > the route since routes are injected into the
> opsf but not the
> > link-states.
> > > > I
> > > > > think the solution is to configure area 1 as
> stub. cheers
> > > > >
> > > > > Winston Goh
> > > > > CCNP, CVE
> > > > > Snr Network Specialist
> > > > > Unisys Singapore
> > > > > mobile : 97469192
> > > > >
> > > > >
> > > > > -----Original Message-----
> > > > > From: Kevin Young [mailto:kvyoung@sina.com]
> > > > > Sent: Wednesday, May 10, 2000 6:18 PM
> > > > > To: Goh, Winston
> > > > > Cc: ccielab
> > > > > Subject: Re: OSPF route filtering on ABRs...
> > > > >
> > > > >
> > > > > Hi , you could do it!
> > > > >
> > > > >
> > > > > r1e0-----e0r2e1-----e0r3
> > > > > area0 area1
> > > > >
> > > > > you must config r2 two ospf routing
> process such as 10 and 20,
> > > > > put r2e0 with area0 in process 10, and put
> r2e1 with area1 in process
> > 20,
> > > > > do this:
> > > > > router ospf 20
> > > > > netowork x.x.x.x x.x.x.x area 1
> > > > > redistribute ospf 10 subnets
> > > > > distribute-list 1 out ospf 10
> > > > >
> > > > > access-list 1 permit x.x.x.x
> (which u want to propagate in
> > area
> > > > 1)
> > > > >
> > > > >
> > > > >
> > > > > **************************************
> > > > > Kevin Young
> > > > > Senior Network Engineer
> > > > > Yinxi Electronic Information Co.,Ltd
> > > > > (86)-10-82625798 x 810
> > > > > **************************************
> > > > >
> > > > > ----- Original Message -----
> > > > > From: Goh, Winston
> <winston.goh@sg.unisys.com>
> > > > > To: 'Kevin Young' <kvyoung@sina.com>; Muthu
> Mohanasundaram
> > > > > <mmsundar@yahoo.com>
> > > > > Cc: ccielab <ccielab@groupstudy.com>
> > > > > Sent: Wednesday, May 10, 2000 9:54 AM
> > > > > Subject: RE: OSPF route filtering on ABRs...
> > > > >
> > > > >
> > > > > > hi,
> > > > > > since ospf is a link-state protocol, using
> distribue-list out ospf
> > is
> > > > > rather
> > > > > > useless because ospf does not propagate
> routing table out its
> > interface
> > > > > but
> > > > > > link states. Therefore, downstream routers
> will still receive the
> > link
> > > > > > states and generate the routes. cheers
> > > > > >
> > > > > > Winston Goh
> > > > > > CCNP, CVE
> > > > > > Snr Network Specialist
> > > > > > Unisys Singapore
> > > > > > mobile : 97469192
> > > > > >
> > > > > >
> > > > > > -----Original Message-----
> > > > > > From: Kevin Young
> [mailto:kvyoung@sina.com]
>
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