From: Bob Sinclair (bsin@cox.net)
Date: Sat Jan 17 2004 - 00:29:39 GMT-3
Alec,
I tried the prepend in a route-map referenced by the attribute-map keyword,
and that did not work. So I kept it simple. As shown below, I was able to
prepend a locally made aggregate using normal route-map methods. Is this what
you are trying to do?
!
router bgp 2
network 192.168.0.0
aggregate-address 192.168.0.0 255.255.254.0 summary-only
neighbor 172.16.7.1 remote-as 1
neighbor 172.16.7.1 route-map PREPEND out
!
R2#sh route-map
route-map PREPEND, permit, sequence 10
Match clauses:
ip address (access-lists): 1
Set clauses:
as-path prepend 2 2 2
Policy routing matches: 0 packets, 0 bytes
route-map PREPEND, permit, sequence 20
Match clauses:
Set clauses:
Policy routing matches: 0 packets, 0 bytes
!
R2#sh access-l
Standard IP access list 1
permit 192.168.0.0, wildcard bits 0.0.1.255 (9 matches) check=9
R2#
R1#sh ip b
BGP table version is 38, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 172.16.0.0 172.16.7.2 0 0 2 ?
*> 172.16.1.0/24 0.0.0.0 0 32768 ?
*> 172.16.2.0/24 172.16.7.2 0 0 2 i
*> 172.16.7.0/24 172.16.7.2 0 0 2 i
*> 172.16.8.0/24 0.0.0.0 0 32768 ?
*> 172.16.14.0/24 172.16.7.2 0 0 2 i
*> 192.168.0.0/23 172.16.7.2 0 2 2 2 2 i
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: "Alec" <clapun@graduate.hku.hk>
To: "Bob Sinclair" <bsin@cox.net>; <ccielab@groupstudy.com>
Sent: Friday, January 16, 2004 9:48 PM
Subject: Re: BGP question
> Bob,
>
> I think attribute-map and route-map achieve the same result. Seems can not
> prepend ASN to prefix ORIGINATED from itself.
>
> rgds,
> alec
>
> ----- Original Message -----
> From: "Bob Sinclair" <bsin@cox.net>
> To: "Alec" <clapun@graduate.hku.hk>; <ccielab@groupstudy.com>
> Sent: Saturday, January 17, 2004 9:41 AM
> Subject: Re: BGP question
>
>
> > Alec,
> >
> > Have you tried applying the route by using the attribute-map keyword on
> the
> > aggregate-address command?
> >
> >
> > Bob Sinclair
> > CCIE #10427, CISSP, MCSE
> > www.netmasterclass.net
> >
> >
> >
> > ----- Original Message -----
> > From: "Alec" <clapun@graduate.hku.hk>
> > To: <ccielab@groupstudy.com>
> > Sent: Friday, January 16, 2004 8:16 PM
> > Subject: BGP question
> >
> >
> > > How can I prepend AS number to an aggregate route originating from
> itself
> > ?
> > > I've used a route-map with prepend command but it doesn't work.
> > >
> > > thanks
> > > alec
> > >
> > > _______________________________________________________________________
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