Ccna routing and Switching Complete Study Guide

neighbor 192.168.1.2 remote-as 100

ISP(config-router)#

neighbor 192.168.2.2 remote-as 200

Be sure to understand that the above command is the neighbor’s IP address and neigh-

bor’s AS number.

Advertise the Local Networks Into BGP

To specify your local networks and advertise them into BGP, you use the 

network

 com-

mand with the 

mask

 keyword and then the subnet mask:

ISP(config-router)#

network 10.0.0.0 mask 255.255.255.0

These network numbers must match what is found on the local router’s forwarding table 

exactly, which can be seen with the 

show ip route

 or 

show ip int brief

 command. For 

other routing protocols, the network command has a different meaning. For OSPF and 

EIGRP, for example, the network command indicates the interfaces for which the rout-

ing protocol will send and receive route updates. In BGP, the network command indicates 

which routes should be injected into the BGP table on the local router.

Figure 21.25 displays the BGP routing configuration for the R1 and R2 routers:

R1#