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Forum Replies

  1. Hi Rene,
    Just to be confirm , If we put the command aggregate-address 172.16.0.0 255.255.0.0 summary-only as-set on R1 then R2/R3 also get the prefix & discard based on as path , right ?Thanks

    br//zaman

  2. Hi Rene
    is there a incorrect that is the As name.
    where is the AS 3 ,in my opinion R3 will be in the AS 3

  3. Hello Laz
    thanks all
    i m lucky because if laz is here no problem

  4. Hello Juan

    In order to use the aggregate-address command to send an aggregate of 10.10.10.0/24, the corresponding loopback with an IP address within that range must be configured on the same router itself. The router will check your command against the IP addresses on the interfaces on the device and not against the BGP table. The problem is not the subnet mask, but the IP address that is not on a local interface.

    Without having actually implemented the lab, my feeling is that If you want to issue the aggregate command, do so in R1. Try it out and let us know your results!

    Laz

  5. Hello Stefanita,

    The aggregate-address command can summarize anything that is in the BGP table. The summary-only option defines whether you advertise the summary route next to the regular route or only the summary route. Quick example:

    R4#show run int l4
    Building configuration...
    
    Current configuration : 69 bytes
    !
    interface Loopback4
     ip address 123.123.123.123 255.255.255.0
    end
    R4#show run | section bgp
    router bgp 4
     bgp log-neighbor-changes
     network 123.123.123.0 mask 255.255.255.0
     neighbor 192.168.14.1 remote-as 1

    123.123.123.0/24 shows up on R1 like this:

    ... Continue reading in our forum

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