Re: Query BGP Community Config

From: garry baker <baker.garry_at_gmail.com>
Date: Sun, 15 Aug 2010 19:58:42 +0300

wouldn't it be that you are permitting the even routes and tagging them with
no advertise and then you have and implied deny after that in your
route-map? at what point do you let the odd routes out?

--
Garry L. Baker
"There is no 'patch' for stupidity." - www.sqlsecurity.com
On Sun, Aug 15, 2010 at 6:27 PM, Vibeesh S <vibselva_at_gmail.com> wrote:
> Hi,
>
> I have a setup with SW --- R1 --- R2
>
> Initially SW is advertising the follwoing to R1
>
> R1#show ip bgp
> *> 9.9.1.0/24       112.10.112.1             0             0 100 i
> *> 9.9.2.0/24       112.10.112.1             0             0 100 i
> *> 9.9.3.0/24       112.10.112.1             0             0 100 i
> *> 9.9.4.0/24       112.10.112.1             0             0 100 i
> *> 9.9.5.0/24       112.10.112.1             0             0 100 i
>
> now we need only routes with odd number is 3rd octet to be propagated to R2
> without configuring R1(meaning configure in sw)
>
> I configured:
> access-list 1 permit 0.0.0.0 255.255.254.255
> route-map BGP permit 10
>  match ip address 1
>  set community no-advertise
> neighbor 112.10.101.1 send-community
>  neighbor 112.10.101.1 route-map BGP out
>
> I get
>
> R1#sh ip bgp
>   Network          Next Hop            Metric LocPrf Weight Path
> *> 9.9.2.0/24       112.10.112.1             0             0 100 i
> *> 9.9.4.0/24       112.10.112.1             0             0 100 i
>
> In R2
> R2#sh ip route bgp
>
> R2#
>
> What is wrong ? Even the answer key looks similar excep for the last octet
> mask in the access list even wen modified does gives the same output. Why
> are we not seein te routes in R1
> what am i missing
> Eventually it I got to work by adding the follwing config on SW
>
> access-list 2 permit 0.0.1.0 255.255.254.255
> route-map BGP permit 5
>  match ip address 2
>
>
> R2#sh ip bgp
>   Network          Next Hop            Metric LocPrf Weight Path
> *> 9.9.1.0/24       112.10.101.1                           0 1000 100 i
> *> 9.9.3.0/24       112.10.101.1                           0 1000 100 i
> *> 9.9.5.0/24       112.10.101.1                           0 1000 100 i
> R2#
>
>
>
> Thanks,
> Vibs
>
>
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Received on Sun Aug 15 2010 - 19:58:42 ART

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