From: Richard Davidson (rich@myhomemail.net)
Date: Sat Dec 13 2003 - 17:23:35 GMT-3
At first I didn't see the deny in your m2 route-map.
"route-map m2 deny 10
match ip address 2"
It appears that you are trying to negate the
non-exist-map. Is that possible? I have tried it and
it doesn't work.
Also, I think your access-lists 1 should read as
follows.
access-list 1 permit 199.10.111.0 0.0.0.0
!
!Not this:
access-list 1 permit 199.10.111.0 0.0.0.255
^
I think yours tells the router to send any
199.10.111.0-255 prefix.
regardless, I have tried both.
Rich
--- Richard Davidson <rich@myhomemail.net> wrote:
> All, thanks for the response.
>
> Arivnd
> Yes, that was my original question. Correct me if I
> am wrong. the neighbor x.x.x.x advertise-map m1
> non-exist-map m2; command is used to advertise the
> route in the advertise map if all of the routes in
> the
> non-exist-map are not in the routing table.
>
> I need to only advertise the summary if I have all
> of
> the 199.10.125.xxx prefixes.
>
> Rich
>
> Resources:
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fiprrp_r/bgp_r/1rfbgp1.htm#1166728
>
> --- Arvinb@comcast.net wrote:
> > Richard
> >
> > I think original question was to advertise the
> > summary address only when
> > both the longer prefixes exists. By default router
> > keep on advertising the
> > summary address until it has a single longer
> prefix
> > route in the routing
> > table. It stops advertising summary-address by
> > defualt if it doesn't have
> > any longer prefix in routing table.
> >
> > Conditional advetisement is BGP will advertise the
> > summary-address when
> > router looses some prefix specified in non-exist
> > map. How about to use this.
> >
> > router bgp xxxx
> > aggregate-address 199.10.111.0 255.255.255.0
> > summary-only
> > !
> > neighbor x.x.x.x advertise-map m1 non-exist-map m2
> >
> > route-map m1 permit 10
> > match ip address 1
> >
> > route-map m2 deny 10
> > match ip address 2
> >
> > access-list 1 permit 199.10.111.0 0.0.0.255
> > access-list 2 permit 199.10.111.160 0.0.0.7
> > access-list 2 permit 199.10.111.168 0.0.0.7
> >
> >
> > Arivnd
> >
> >
> > ----- Original Message -----
> > From: <vdadlaney@comcast.net>
> > To: "Richard Davidson" <rich@myhomemail.net>
> > Cc: "groupstudy" <ccielab@groupstudy.com>
> > Sent: Saturday, December 13, 2003 11:12 AM
> > Subject: Re: BGP summary address
> >
> >
> > > Hi Richard,
> > >
> > > Are you sure you want to advertise a /24 for
> these
> > routes. I personally
> > would aggregate to 199.10.111.160 255.255.255.240.
> > Than as per your
> > requirements you can do a aggregate-address
> > 199.10.111.160 255.255.255.240
> > summary-only or if you want the more specifics
> than
> > remove the summary-only.
> > Once that is done than u can use a distribute-list
> > on the neighbor statement
> > to the ebgp peers to deny the more specific routes
> > if you have not used the
> > summary-only option and allow only the summary to
> > your ebgp peers. Ofcourse
> > if you want to send a /24 than you can aggregate
> to
> > that and follow the same
> > method. I think that would work. If anyone thinks
> > this might not work than
> > please do correct me. Thanks
> > >
> > > Regards,
> > >
> > > Vikram
> > > > I need to send a summary address from two bgp
> > routers
> > > > in one as to two other AS numbers. I need to
> > only
> > > > send the summary to the remote AS numbers if
> the
> > local
> > > > router knows about all of the local routes
> that
> > fall
> > > > under the summary. Is this possible.
> > Basically, send
> > > > 199.10.111.0/24 if; 199.10.111.160/29 and
> > > > 199.10.111.168/29 exists.
> > > >
> > > > Thanks for the support
> > > > Rich
> > > >
> > > > =====
> > > > Richard Davidson
> > > > Yahoo IM: r1davidson
> > > > e-mail rich@myhomemail.net
> > > >
> > > >
> >
>
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