Re: advertise a BGP aggregated prefix only without summary and

From: KSGoh (kianseng.goh@gmail.com)
Date: Mon Sep 12 2005 - 10:21:04 GMT-3


any comment on the following config ?

router bgp 12
 no synchronization
 bgp log-neighbor-changes
 network 192.168.2.0
 aggregate-address 100.0.0.0 255.0.0.0 as-set attribute-map TEST
 aggregate-address 200.0.0.0 255.0.0.0 as-set
 neighbor 10.10.1.1 remote-as 12
 neighbor 10.10.1.1 send-community extended
 neighbor 10.10.2.2 remote-as 254
 neighbor 10.10.2.2 send-community extended
 neighbor 10.10.2.2 soft-reconfiguration inbound
 neighbor 10.10.2.2 route-map FROM_AS2 in
!
ip classless
ip route 200.100.200.0 255.255.255.0 Null0
ip http server
!
no cdp run
route-map TEST permit 10
 set community none
!
route-map FROM_AS2 permit 10
 set community no-advertise
!

----- Original Message -----
From: "Rajib Khan" <rajib56666@yahoo.com>
To: "Zouta oxpf" <zouta.oxpf@gmail.com>; <nhqky888@ybb.ne.jp>
Cc: <ccielab@groupstudy.com>
Sent: Sunday, September 04, 2005 10:36 PM
Subject: Re: advertise a BGP aggregated prefix only without summary and
suppress key word

>I don't think it's possible
>
> If you are not allowed to use summary-only or suppress key word then only
> option left is filtering like distribute-list, route-map or prefix-list.
>
> HTH
>
> Raj
>
> Zouta oxpf <zouta.oxpf@gmail.com> wrote:
> If you are allowed to use route-maps for this task, you can point a
> route-map to R1 matching only the aggregate, and ignore the second
> instance
> of the route-map.
> Regards
> Z
>
> On 9/3/05, nhqky888@ybb.ne.jp wrote:
>>
>> Hi,
>>
>> Here is a BGP task.
>>
>>
>> (AS12)[ R1------R2 ]------BB1(AS254)
>>
>> R2 aggregates prefixes which BB1 advertises to eBGP router R2 on AS12.
>> R2 should advertise only the aggregated prefix to iBGP router R1.
>> You should not use any filtering tools and summary or suppress key word.
>>
>> How can I accomplish this task?
>> Please give me any comment.
>>
>>
>> KY
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>
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>
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----- Original Message -----
From: "Imal kalutotage" <imal.kalutotage@gmail.com>
To: <nhqky888@ybb.ne.jp>
Cc: <ccielab@groupstudy.com>
Sent: Saturday, September 03, 2005 10:40 PM
Subject: Re: advertise a BGP aggregated prefix only without summary and
suppress key word

> Hi Ky,
> Try to maatch those specific routes & apply an input route-map on R2 for
> BB
> neighboship to set the bgp community "no-advertise "
> This will prevent the R2 from advertising this to any peer
> Cheers,
> Imal
>
>
> On 9/3/05, nhqky888@ybb.ne.jp <nhqky888@ybb.ne.jp> wrote:
>>
>> Hi,
>>
>> Here is a BGP task.
>>
>>
>> (AS12)[ R1---<iBGP>---R2 ]----<eBGP>--BB1(AS254)
>>
>> R2 aggregates prefixes which BB1 advertises to eBGP router R2 on AS12.
>> R2 should advertise only the aggregated prefix to iBGP router R1.
>> You should not use any filtering tools and summary or suppress key word.
>>
>> How can I accomplish this task?
>> Please give me any comment.
>>
>>
>> KY
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html



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