H3C SecPath F1800-A Operation Manual page 321

Operation Manual - Network and Routing Protocol
H3C SecPath F1800-A Firewall
6.2.18 Configuring BGP Route Reflector
To ensure the interconnection between IBGP peers, it is necessary to establish fully
meshed network. However, it will cost a lot in the case there are large numbers of
IBGP peers.
Thus, route reflector can be adopted to solve the problem. Route reflector acts as the
center of the network, and other routers act as the clients. A peer relation is set up
between the client and the route. The route reflector transmits (reflects) information
between clients.
EBGP
Figure 6-2 The route reflector diagram
In Figure
Router B as two clients. Router A receives an update route from the external peer and
sends it to Router C, and then Router C reflects it to the client Router B. Under this
configuration, peer session between Router A and Router B is virtually unnecessary,
and they need only establish peer session with Router C respectively.
The BGP router which is neither router reflector nor client is called a non-client. Fully
meshed connection must be established between a non-client and the route reflector
or between non-clients.
The route reflection function is only configured on the route reflector, and the clients
should be specified at the same time.
I. Configuring Route Reflection Between Clients
Do as follows in BGP view, multicast sub-address family view or VPNv4 sub-address
family view.
Route reflector
Update route
Router A
6-2, Router C serves as a route reflector, with two clients, Router A and
Chapter 6 BGP/MBGP Configuration
Router C
Reflected route
Router B
5-104
EBGP