Cisco NCS 5500 Series Configuration Manual page 149

Implementing BGP
Information about Implementing BGP
Router A, it advertises them to Router C, and vice versa. This scheme eliminates the need for the iBGP session
between routers A and C.
Figure 3: Simple BGP Model with a Route Reflector
The internal peers of the route reflector are divided into two groups: client peers and all other routers in the
autonomous system (nonclient peers). A route reflector reflects routes between these two groups. The route
reflector and its client peers form a cluster. The nonclient peers must be fully meshed with each other, but the
BGP Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
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