Huawei Quidway NetEngine80E Configuration Manual page 770

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
Table 8-3 Solutions to configuring and managing a large-scale BGP network
Solution
Peer group
Route reflector
(RR)
Confederation
Issue 02 (2014-09-30)
Main Objectives
To improve
configuration
efficiency and route
advertisement
efficiency.
To simplify network
configurations and
improve configuration
efficiency by
minimizing full-mesh
IBGP connections
within an AS.
To simplify network
configurations and
improve configuration
efficiency by
minimizing full-mesh
IBGP connections
within an AS.
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Feature
A peer group is a group
of peers with the same
routing policies. After
a peer is added to a peer
group, it inherits the
configurations of this
peer group. When the
configurations of the
peer group are
changed, the
configurations of peers
in this group are
changed accordingly.
In an AS, one device
functions as a route
reflector and other
devices function as
clients. The clients
establish IBGP
connections with the
RR. The RR reflects
routes among the
clients, and therefore
BGP connections do
not need to be
established between
the clients.
It divides an AS into
several sub-ASs. A
full-mesh connection is
established between
every two IBGP peers
in each sub-AS, and an
EBGP connection is
established between
every two sub-ASs.
8 BGP Configuration
Defect
-
-
The device needs to be
reconfigured when the
network deployment
mode is switched from
non-confederation to
confederation. After
the reconfiguration, the
logical topology
changes accordingly.
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