Which command is used to advertise networks to inject routes from the IPv4 routing table into the BGP table?

• A. Network network-number mask network-mask router config command
• B. Network 10.0.0.0 255.0.0.0
• C. Advertise network command
• D. Neighbor network command

Answer: (A)

In BGP, to bring networks from the router’s IPv4 routing table into BGP, you use the network command. This command tells BGP which local networks to originate and advertise, but only if those networks exist in the router’s routing table. The syntax is network mask , meaning you specify the network address and the corresponding mask that defines the exact prefix to inject. For example, network 10.0.0.0 255.0.0.0 will advertise 10.0.0.0/8 if that prefix is present in the RIB. This is the mechanism BGP uses to originate locally learned routes into BGP, rather than redistributing routes from another protocol.