Chapter 16 - BGP | 275 |
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Subnet Mask
The optional mask parameter tells the router how many bits of the IP routing table entry to match against the IP address listed in the BGP Network. If a mask is not provided, an all 255’s mask will be assumed.
ϖNote: This is not necessarily the actual mask of the network you wish to advertise because subnet masks more specific than Class C are automatically truncated. This truncation is not the same as aggregation, and only applies to internal networks, and only to masks more specific than Class C.
