Getting Networks into BGP

Two ways to get networks into BGP

  • Network Commandrouter bgp 6500
    network 50.0.0.0By default and based on the config above, BGP will send out a classful advertisement  i.e. Class A.  This is worked around by using the “mask” parameter but the mask must match exactly what is configured on the interface – it cannot be used for summarisation etc.

    router bgp 6500
    network 50.1.1.0 mask 255.255.255.0

  • RedistributionBy default, BGP auto-summarisation is turned on when using redistribution with IOS prior to 12.2(8)T. From this version onwards, it is turned off by default.

 

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