From: keith tokash (ktokash@hotmail.com)
Date: Mon Dec 31 2007 - 17:00:36 ARST
I remember this scenario from IE. There are two points of mutual
redistribution between RIP and OSPF. Did you tag the routes being
redistributed on both R1 and R3? I know the solution guide just tagged them
"110" and "120", but I tagged them 1110, 1120, 3110, and 3120, so I could jump
on SW2 and do a show ip route x.x.x.x and see the tag nice and easily. It
helps track down if you have leakage where you don't expect it.
With a few exceptions, secrecy is deeply incompatible with democracy and with
science.
--Carl Sagan
> From: huan.pham@valuenet.com.au
> To: nhatphuc@gmail.com
> CC: ccielab@groupstudy.com
> Subject: RE: Can't filter prefix longer than 24 from OSPF to RIP
> Date: Tue, 1 Jan 2008 01:45:05 +1100
>
> Hi,
>
> It looks like that R1 already learnt about those subnets via RIP as well.
> (including the one with subnets more than 25).
>
> Your config tells that R1 can only advertise RIP routes via Fa0/0, all
other
> interfaces are passive, this does not prevent R1 from receiving RIP routes
> from other passive interfaces.
>
> > > router rip
> > > version 2
> > > redistribute ospf 1 metric 1 route-map OSPF->RIP
> > > passive-interface default
> > > no passive-interface FastEthernet0/0
>
> Could you pls disable redistribution from OSPF to RIP, and do show ip
route,
> or show ip rip database, and see if those routes you want to filter already
> exist in your RIP table.
>
> router rip
> version 2
> no redistribute ospf 1 metric 1 route-map OSPF->RIP
>
> Cheers,
>
> Huan
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> nhatphuc
> Sent: Monday, 31 December 2007 11:24 PM
> To: Gary Duncanson
> Cc: ccielab@groupstudy.com
> Subject: Re: Can't filter prefix longer than 24 from OSPF to RIP
>
> See my answer below
>
> Thanks
> Phuc
>
> On Dec 31, 2007 5:51 PM, Gary Duncanson <gary.duncanson@googlemail.com>
> wrote:
>
> > Hi Phuc,
> >
> > Have you tried restarting the ospf process or clear ip route on SW2?
>
>
> SW2 and R1 run RIP and I tried "clear ip route *" on SW2
>
> >
> >
> > Can SW2 receive these routes from somewhere other than R1 perhaps?
>
>
> I don't think so because the next hop is from 163.1.18.1
>
>
> >
> >
> > Gary
> >
> > ----- Original Message -----
> > From: "nhatphuc" <nhatphuc@gmail.com>
> > To: "Cisco certification" <ccielab@groupstudy.com>
> > Sent: Monday, December 31, 2007 10:08 AM
> > Subject: Can't filter prefix longer than 24 from OSPF to RIP
> >
> >
> > > HI Group,
> > >
> > > Please help why I can't filter prefix longer than 24 redistributed into
> > > RIP
> > > from OSPF:
> > >
> > > This is my config:
> > >
> > > R1
> > >
> > > router rip
> > > version 2
> > > redistribute ospf 1 metric 1 route-map OSPF->RIP
> > > passive-interface default
> > > no passive-interface FastEthernet0/0
> > > network 163.1.0.0
> > > no auto-summary
> > > !
> > > ip forward-protocol nd
> > > !
> > > ip http server
> > > no ip http secure-server
> > > !
> > > ip prefix-list NOT_LONGER24 seq 5 permit 0.0.0.0/0 le 24
> > > !
> > > route-map OSPF->RIP permit 10
> > > match ip address prefix-list NOT_LONGER24
> > >
> > > DEBUG IP RIP on R1:
> > >
> > > *Dec 31 17:42:39.209: RIP: sending v2 update to 224.0.0.9 via
> > > FastEthernet0/0 (163.1.18.1)
> > > *Dec 31 17:42:39.209: RIP: build update entries
> > > *Dec 31 17:42:39.209: 10.0.0.0/8 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 150.1.2.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 150.1.3.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 150.1.4.0/23 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 150.1.4.4/32 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 150.1.5.5/32 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 150.1.6.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 150.1.7.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 150.1.8.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.0.0/25 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.0.128/25 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.3.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.4.0/24 via 0.0.0.0, metric 1, tag 0
> > > Rack1R1#
> > > *Dec 31 17:42:39.209: 163.1.5.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.6.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.7.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.12.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.13.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.13.3/32 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.15.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.35.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.38.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.45.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.45.5/32 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 163.1.54.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: RIP: build update entries
> > > *Dec 31 17:42:39.209: 163.1.57.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 192.10.1.0/24 via 0.0.0.0, metric 1, tag 0
> > > *Dec 31 17:42:39.209: 204.12.1.0/24 via 0.0.0.0, metric 1, tag 0
> > >
> > > SW2 still see route longer than 24 from R1 (163.1.18.1)
> > > SW2#
> > > R 204.12.1.0/24 [120/1] via 163.1.18.1, 00:00:04, FastEthernet0/21
> > > R 163.1.0.0/25 [120/4] via 163.1.18.1, 00:00:04, FastEthernet0/21
> > > R 163.1.6.0/24 [120/1] via 163.1.18.1, 00:00:04, FastEthernet0/21
> > > R 163.1.13.3/32 [120/4] via 163.1.18.1, 00:00:04,
FastEthernet0/21
> > > R 163.1.12.0/24 [120/1] via 163.1.18.1, 00:00:04,
FastEthernet0/21
> > > R 150.1.6.0/24 [120/4] via 163.1.18.1, 00:00:04, FastEthernet0/21
> > > R 150.1.3.0/24 [120/4] via 163.1.18.1, 00:00:04, FastEthernet0/21
> > > R 150.1.2.0/24 [120/1] via 163.1.18.1, 00:00:04, FastEthernet0/21
> > > R 150.1.5.5/32 [120/4] via 163.1.18.1, 00:00:05, FastEthernet0/21
> > > R 150.1.4.4/32 [120/4] via 163.1.18.1, 00:00:05, FastEthernet0/21
> > >
> > > Thanks
> > >
> > > Phuc
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Tue Jan 01 2008 - 12:04:32 ARST