ip-address— Neighbor's IP address.
peer-group-name— Name of the peer group. See section 8-19.
number— Neighbor's autonomous system number (1 to 65534).
Purpose: This form of the neighbor command is the most important. This command is used to configure an internal BGP (IBGP) or external BGP (EBGP) TCP session with another router. Routing information cannot be exchanged without a proper neighbor configuration. When configuring BGP, either in a customer's network or on the CCIE exam, we suggest that you first establish and verify that the neighbor relationships have been established. A common mistake is to attempt to enter a complete BGP configuration, which might include ...