Similar to neighbor adjacency establishment, route advertisement issues are commonly due to simple device misconfigurations. In Cisco IOS software, there are 3 (three) ways that can be used to advertise networks when using Border Gateway Protocol. These ways or methods include using the network [network] mask [mask] command, using the aggregate-addresscommand, and using the redistribute [protocol] command. The first two methods are discussed in this section; however, redistribution will be discussed in the following section. In addition, this section will also discuss route advertisement following BGP policy changes.
Route Advertisement with . . .
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