From: kasturi cisco (kasturi_cisco@hotmail.com)
Date: Mon Oct 27 2003 - 13:36:55 GMT-3
Ken,
Looks like you got the solution but have a Q which i want to clarify. To
prevent the aggregate address from coming back in,why do u want to use a
route-map. It will work.But wont aggregate-address as-set do the same
thing.
Good Luck,
Kasturi.
>From: Ken.Farrington@barclayscapital.com >Reply-To:
Ken.Farrington@barclayscapital.com >To: ccielab@groupstudy.com >Subject:
RE: BGP Quickie :) >Date: Fri, 24 Oct 2003 19:02:08 +0100 > >thx - that
is what I am currently doing to form the aggregate. > >If thats the only
way, so be it :)) > >thx for your help Guy > >-----Original Message-----
>From: Lupi, Guy [mailto:Guy.Lupi@eurekanetworks.net] >Sent: 24 October
2003 18:13 >To: 'Ken.Farrington@barclayscapital.com';
ccielab@groupstudy.com >Subject: RE: BGP Quickie :) > > >So you don't
have a route to the aggregate in the table, and you have no >more
specific routes. > >Option 1 > >You can inject a more specific route into
bgp from another router in the AS >and use the aggregate-address command.
> >Option 2 > >You can assign a loopback interface on the router with an
IP address in the >156.155.x.x range with the same subnet mask as the
aggregate, you can then >use a network statement to inject this into bgp.
> > >-----Original Message----- >From: Ken.Farrington@barclayscapital.com
>[mailto:Ken.Farrington@barclayscapital.com] >Sent: Friday, October 24,
2003 12:38 PM >To: Ken.Farrington@barclayscapital.com; Lupi, Guy;
ccielab@groupstudy.com >Subject: RE: BGP Quickie :) > >sorry, CANT use
static route :) > >-----Original Message----- >From: Farrington, Ken: IT
(LDN) >Sent: 24 October 2003 17:37 >To: 'Lupi, Guy'; Farrington, Ken: IT
(LDN); ccielab@groupstudy.com >Subject: RE: BGP Quickie :) > > >Its not a
lab requirement, it's a ken requirement. just looking at >different way
to potential advertise summaries. > >oh, btw, i can use any static routes
> > >many thx indeed :) > >-----Original Message----- >From: Lupi, Guy
[mailto:Guy.Lupi@eurekanetworks.net] >Sent: 24 October 2003 17:34 >To:
'Ken.Farrington@barclayscapital.com'; ccielab@groupstudy.com >Subject:
RE: BGP Quickie :) > > >I'm not sure that I understand the issue, you
want to announce 155.156.x.x >without having a more specific route in the
table? Is this a lab >requirement? If so what exactly does it say? >
>-----Original Message----- >From: Ken.Farrington@barclayscapital.com
>[mailto:Ken.Farrington@barclayscapital.com] >Sent: Friday, October 24,
2003 11:37 AM >To: ccielab@groupstudy.com >Subject: BGP Quickie :) >
>Hello, I have a BGP Question. > >I want to summarise my network to an
external peer, but I dont have any >subnets >of my network 155.156.x.x in
the BGP forwarding table. > >For me to aggregate an address to pass to my
external peer, I must have at >lease one >155.156.x.x subnet in my BGP
table. or that is what i understand. As you >can see, I am >also stopping
the agg route being pumped back into AS 65001 via a neighbor >route-map.
> >I there a cleaner way to do this, rather than me just selcting a
155.156.x.x >network and pumping into >BGP table via a network statement
on one of my IBGP peers within my AS65001? > >Many thx to all :) >Ken > >
>! >router bgp 65001 > no synchronization > bgp log-neighbor-changes >
aggregate-address 155.156.0.0 255.255.0.0 summary-only > neighbor
19.19.19.19 remote-as 65001 > neighbor 19.19.19.19 ebgp-multihop 255 >
neighbor 19.19.19.19 update-source Loopback111 > neighbor 19.19.19.19
route-map filter out > neighbor 20.20.20.20 remote-as 500 >! >access-list
99 permit 155.156.0.0 >! >route-map filter deny 10 > match ip address 99
>! >route-map filter permit 20 >! > >
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