Query BGP Community Config

From: Vibeesh S <vibselva_at_gmail.com>
Date: Sun, 15 Aug 2010 20:57:14 +0530

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 - 20:57:14 ART

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