From: Tarun Pahuja (pahujat@gmail.com)
Date: Sun Jun 17 2007 - 23:47:50 ART
Alan,
When the aggregate-address command is used with the
summary-only option, the more-specific routes of the aggregate are
suppressed. The aggregate-address summary-only command suppresses the
more-specific routes to all neighbors. You can use an unsuppress map to
selectively leak more-specific routes to a particular neighbor.
Please take a look at the following link for the correct syntax:
http://cisco.iphelp.ru/faq/25/ch08lev1sec32.html
HTH,
Tarun
On 6/18/07, Alan Ewer <acewer64@gmail.com> wrote:
>
> Hi Tarun.
> Thanks for the response.
>
> This example specifically talsk about aggregates and suppress-maps.. I
> have seen something "weird" with an unsupress map in combination with an
> outbound route-map as a prefix filter..
>
> specifically
>
> if i have on R1
> router bgp 100
> aggregate address 1.0.0.0 255.0.0.0 summary-only
> nei 1.1.1.2 unsuppress-map UNSUPRESS
> nei 1.1.1.2 route-map TO-R2 out
>
> route-map UNSUPRESS permit 10
> route-map TO-R2 deny 10
> match ip address prefix VLAN3
> route-map TO-R2 permit 100
> ip prefix-list VLAN3 permit 1.1.3.0/24
>
>
> i am still seeing 1.1.3.0/24 appear on R2 ??
> so it seems that the route-map is over-riden by the supress map...
> How i got around it was to add the "deny vlan3" configuration to the
> unsupress map
> ...
>
> which made the UNSUPRESS route map look like
> route-map UNSUPRESS deny 5
> match ip add pref VLAN3
> route-map UNSUPRESS permit 100
>
> Regds
> Alan E
> Brisbane Oztralia
>
>
> On 6/18/07, Tarun Pahuja <pahujat@gmail.com> wrote:
> >
> > Alan,
> > The following Link talks about the impact of supress map on
> > other configurations.
> >
> > http://www.cisco.com/warp/public/459/aggregation.html#suppmap
> >
> > Thanks,
> > Tarun
> >
> >
> > On 6/17/07, Alan Ewer < acewer64@gmail.com> wrote:
> >
> > > Hi .
> > > Sorry if this has been asked before. But !!
> > > Is there some reason why a Unsupress map will overrode an outbound
> > > router
> > > map when applied to a neighbour ?
> > >
> > > Regds
> > > Alan E
> > > Brisbane Oztralia
> > >
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
> > >
> >
> >
> >
> > --
> > Tarun Pahuja
> > CCIE#7707(R&S,Security,SP,Voice,Storage),CCSI
>
>
>
-- Tarun Pahuja CCIE#7707(R&S,Security,SP,Voice,Storage),CCSI
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