Operation Manual – Routing Protocol
H3C S5600 Series Ethernet Switches
Chapter 5 BGP Configuration
5-31
5.7 Configuring a Large-Scale BGP Network
In large-scale network, there are large quantities of peers. Configuring and
maintaining the peer becomes a big problem. Using peer group can ease the
management and improve the routes sending efficiency. According to the different
ASs where peers reside, the peer groups fall into IBGP peer groups and EBGP peer
groups. For the EBGP peer group, it can also be divided into pure EBGP peer group
and hybrid EBGP peer group according to whether the peers in the EBGP group
belong to the same exterior AS or not.
Community can also be used to ease the routing policy management. And its
management range is much wider than that of the peer group. It is AS-independent. It
controls the routing policy of multiple BGP routers.
In an AS, to ensure the connectivity among IBGP peers, you need to set up full
connection among them. When there are too many IBGP peers, it will cost a lot in
establishing a full connection network. Using RR or confederation can solve the
problem. In a large AS, RR and confederation can be used simultaneously.
5.7.1 Configuration Prerequisites
Before configuring a large-scale BGP network, ensure network layer connectivity
between adjacent nodes.
Before configuring a large-scale BGP network, you need to prepare the following
data:
z
Peer group type, name, and the peers included.
z
If you want to use community, the name of the applied routing policy is needed.
z
If you want to use RR, you need to determine the roles (client, non-client) of
routers.
z
If you want to use confederation, you need to determine the confederation ID and
the sub-AS number.
5.7.2 Configuring BGP Peer Group
Follow these steps to configure a BGP peer group:
To do...
Use the command...
Remarks
Enter system view
system-view
—
Enter BGP view
bgp
as-number
—