Task 2.6 BGP Summarization

According to the SG there are two ROUTE-MAPs.

But i think so one will do the same because we are mapping same prefix-list to two route-maps.

 

Please correct me if i am wrong.

 

Mani

Comments

  • Yes it is correct.

    Good luck with your studies!

  • I also use single route-map for both BGP neighbors :)

  • Instead of redistribution, could we have just added a network statement?  What in the task wording leads us to believe that the static route needs to be redistributed?

     

    router bgp 65145

    network 174.1.0.0 mask 255.255.0.0

     

    Thanks

  •  

    Yes you inedeed can. Actually, the SG mentioned that both way ways work, but using network statement or "controlled redistribution with tage based route-maps" is preferred in real world scenarios. The SG used uncontrolled redistribution which is simple & valid solution.

  • Agreed with Bassam!

    I always use the network statement on production networks as it is more elegant. In the lab you can choose whatever you want, as long as it does not violate any restrictions.

    Just my 2 cents

  • I created an Aggregate and it seemed to work ok, Any thoughts on doing it this way?

     

     

    R5

    !

    conf t

    !

    ip route 174.8.0.0 255.255.0.0 null0

    !

    ip prefix-list DENY_SUMMARY seq 5 deny 174.8.0.0/16

    ip prefix-list DENY_SUMMARY seq 10 permit 0.0.0.0/0 le 32

    !

    route-map DENY_SUMMARY permit 10 

     match ip address prefix-list DENY_SUMMARY

     set ip next-hop peer-address

    !

    router bgp 65145

     network 174.8.0.0 mask 255.255.0.0

     neighbor 150.8.4.4 route-map DENY_SUMMARY out

     neighbor 150.8.1.1 route-map DENY_SUMMARY out

     aggregate-address 174.8.0.0 255.255.0.0

    end

     

     

     

    R6

    !

    conf t

    !

    ip route 174.8.0.0 255.255.0.0 null0

    !

    ip prefix-list DENY_SUMMARY seq 5 deny 174.8.0.0/16

    ip prefix-list DENY_SUMMARY seq 10 permit 0.0.0.0/0 le 32

    !

    route-map DENY_SUMMARY permit 10 

     match ip address prefix-list DENY_SUMMARY

     set ip next-hop peer-address

    !

    router bgp 65267

     network 174.8.0.0 mask 255.255.0.0

     aggregate-address 174.8.0.0 255.255.0.0

     neighbor 174.8.26.2 route-map DENY_SUMMARY out

     neighbor 174.8.67.7 route-map DENY_SUMMARY out

    end


    Marc

     

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