From: shahid Ansari (shahid1357@gmail.com)
Date: Sun Dec 09 2007 - 09:21:22 ART
Hi Phillip,,
Distance command is only effect on Local router .so it will not effect to
R4 at all and in OSPF as you know routes can not be control by using OUT
keyword due to its way of LSA working.
*Inter-Area Filtering*
**
1)OSPF summary-prefixes on ABRs
Area X filter-list ( called by prefix list) - Between two Areas
2)Filter OSPF summary-prefixes using network ranges
Area X range a.a.a.a b.b.b.b not- advertise (keyword)
not-adv keyword use to block propagation of summary .
3)Ingress Filtering with Distribute-list (egress doesn`t work)
note that distribute list only block route from entering local RIB, and does
not stop LSA propagation
distribute-list X in (called by access-list)
In your case you can use distribute-list with access-list to block routes
but it will enter to your database.
Thanks
Shahid
On Dec 8, 2007 7:55 PM, Kim teu <kim.teu@gmail.com> wrote:
> Distance is locally significant. You have to use distance 255 on all
> router
> to prevent the route from entering the routing table, but it will still
> show
> up in the OSPF database.
>
> Regards,
> Kim
>
>
> On 12/8/07, Darren Johnson <dazza_johnson@yahoo.co.uk> wrote:
> >
> > I don't believe the distance command will work here. My understanding of
> > the
> > OSPF distance command is, there are two options:
> >
> > 1) Distance command is used to change OSPF admin distances received from
> > ANY/ALL routers.
> > 2) Distance command can be configured to change admin distance for
> > specific
> > routes (reference in an ACL) from specific routers (specified as
> > RouterID).
> >
> > In both cases, this is required on the 'local' router. In this task, its
> > states that you cannot touch R4 to achieve this.
> >
> > Any other ideas guys?
> >
> > Dazzler
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > itsfortarget iwillgetit
> > Sent: 08 December 2007 06:41
> > To: Phillip.McCollum@ins.com
> > Cc: ccielab@groupstudy.com
> > Subject: Re: ospf intra are route filtering
> >
> > Hi Phillip,
> >
> > Can u give some inputs how distance works in this scenario?
> >
> > On Dec 8, 2007 1:52 AM, <Phillip.McCollum@ins.com> wrote:
> >
> > > That 'distance' command could be useful here:
> > >
> > >
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hi
> > > rp_r/rte_pih.htm#wp1134155
> > >
> > > Phillip
> > >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > > itsfortarget iwillgetit
> > > Sent: Friday, December 07, 2007 10:33 AM
> > > To: ccielab@groupstudy.com
> > > Subject: ospf intra are route filtering
> > >
> > > Dear Group,
> > >
> > > Pls listen this.....
> > > I have Three Routers say R1, R2 , and R3 are connected in a
> > > triangle topology and all are in OSPF area 0. now R3 is connoted with
> R4
> > > with a serial link which is also part of area 0.In R1 have some net
> > > works
> > > say, 192.168.1.0, 2.0 and 3.0 which is published in OSPF domain.My
> > > policy
> > > strict that the 192.168.3.0 network should not appear in R4's routing
> > > table,
> > > but I have only access to R1 and R2 to achieve this task.
> > >
> > > could you please throw some inputs to filter this OSPF route in this
> > > single
> > > area?.
> > >
> > > Regards.
> > >
> > >
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