From: Alejandro Cadarso (a.cadarso@xxxxxxxxxxxxxx)
Date: Mon Sep 11 2000 - 06:37:54 GMT-3
Earl,
As you can see that was also my undersatnding, but I tried to filter out
routes in a ABR on friday and it doesn't work, I can't understand why IOS
doesn't allow it.
As a reminder in the cco link below:
http://www.cisco.com/warp/public/104/9.html#Q9
"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 inter-area routes."
Earl Aboytes wrote:
>
> My understanding is that all routers in a single area must have the same
> database. It makes sense that you cannot filter within an area but you
> should be able to filter at the ABR to prevent a route from existing in an
> area.
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Earl Aboytes CCIE #6097
> Senior Technical Consultant
> GTE Managed Solutions
> 805-381-8817
> earl.aboytes@verizon.com
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Kenneth Kriel
> Sent: Sunday, September 10, 2000 5:59 AM
> To: 'Ccielab; Alejandro Cadarso
> Subject: RE: OSPF Filtering
>
> Hi all,
>
> Thank you for your replies, I am sorry I could not attend to it earlier
> cause I was out of the country.
>
> As many have said, distribute lists do not work if it is in the same OSPF
> AS. This I found out the hard way, by trying distribute lists incoming and
> outgoing on both routers. The route still appears in my OSPF area 0.
>
> I would like to assume the following, however, I need confirmation:
>
> Distrubute lists do not work within OSPF, due to the link state issue !
>
> If you believe differently, and you can prove it please send me your config.
> Mine is as follows : (on R2 as per the diagram at the botom !
>
> Thank you for your assistance !!!
>
> Ken
>
> !
> interface Loopback0
> ip address 132.1.1.1 255.255.255.255
>
> interface Serial0
> ip address 135.1.2.1 255.255.255.224
> encapsulation frame-relay
> ip ospf network point-to-multipoint
> no ip mroute-cache
> bandwidth 64
> no fair-queue
> clockrate 64000
> frame-relay map ip 132.1.2.3 104 broadcast
> frame-relay map ip 132.1.2.4 104 broadcast
>
> router ospf 1
> network 135.1.1.1 0.0.0.0 area 1
> network 135.1.2.1 0.0.0.0 area 0
> distribute-list 17 in Serial0
>
> access-list 17 deny 192.2.2.0 0.0.0.255
> access-list 17 permit any
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Alejandro Cadarso
> Sent: Friday, September 08, 2000 6:30 PM
> To: mark salmon; ccielab
> Subject: Re: OSPF Filtering
>
> For me the distibute-list in works Ok
>
> 2503-mad#sh ip ospf dat
>
> OSPF Router with ID (190.19.15.225) (Process ID 200)
>
> Router Link States (Area 0)
>
> Link ID ADV Router Age Seq# Checksum Link count
> 190.19.15.193 190.19.15.193 804 0x80000006 0x960E 3
> 190.19.15.225 190.19.15.225 838 0x800000F5 0x9BE6 2
> 210.10.10.9 210.10.10.9 7 (DNA) 0x800000EB 0x1FAA 1
>
> Summary Net Link States (Area 0)
>
> Link ID ADV Router Age Seq# Checksum
> 190.1.0.0 210.10.10.9 246 (DNA) 0x80000094 0x95D
> 190.19.15.224 190.19.15.225 766 0x80000095 0xB27
> 192.19.18.0 210.10.10.9 246 (DNA) 0x80000093 0x47FA
> 210.10.10.8 190.19.15.193 804 0x80000002 0xACF6
> 210.10.10.8 210.10.10.9 11 (DNA) 0x8000009D 0x803A
>
> 2503-mad#sh ip ro 190.1.0.0
> % Network not in table
>
> Perhaps some misconfigured command or IOS bug.
>
> mark salmon wrote:
> >
> > II have used the dstributed in with OSPF in the past. At first, the
> > route was gone from the routing table. After about 1 minute, the route
> > was back.
> >
> > Geatti wrote:
> > >
> > > Remember, OSPF sends LSAs not ROUTES so a distribute-list out on an
> > > interface is useless.
> > > You can use a distribute-list in and this should work for blocking the
> route
> > > from the local router.
> > > If this doesn't work for you post your config.
> > >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > > Kenneth Kriel
> > > Sent: Friday, September 08, 2000 9:42 AM
> > > To: 'Ccielab
> > > Subject: OSPF Filtering
> > >
> > > Gentleman,
> > >
> > > How do I filter a route from coming into OSFP ? I know it might be a
> stupid
> > > question but I can not get it to work !
> > >
> > > Layout
> > >
> > > OSPF Area 1 Area 0
> > > 192.2.2.0/24----|
> > > |--R1-----R2
> > > 135.1.x.0/24----|
> > >
> > > I do not want to see 192.2.2.0/24 on router R2 !
> > >
> > > I tried distribute-list out on R1 and in on R2 but no luck !
> > >
> > > Thank you in advance !
> > >
> > > Ken
> > >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:24:54 GMT-3