Huawei Quidway S3500 Series Operation Manual page 238

Operation Manual - Routing Protocol
Quidway S3500 Series Ethernet Switches
on route reflector, and all client peers and non-client peers are routine BGP peers. The
client peers are client peers just because the route reflector lists them as client peers.
I. Configure the route reflection between clients
Perform the following configurations in BGP view.
Table 5-33 Configuring the route reflection between clients
Enable route reflection between clients
Disable route reflection between clients
By default, the reflection between clients is enabled.
II. Configuring the cluster ID
Generally, there is only one route reflector in a cluster.
Perform the following configurations in BGP view.
Table 5-34 Configuring the Cluster_ID of the route reflector
Configure the Cluster_ID of the route reflector
Canceling the Cluster_ID of the route reflector
By default, the router ID of the route reflector is used as the cluster ID.
III. Two kinds of measures to avoid looping inside AS
As route reflector is imported, it is possible that path looping will be generated in AS.
Path update packets already left the cluster may attempt to return to the cluster. The
conventional AS path method can't detect the internal AS looping, because the path
update packet hasn't left AS. Upon configuring route reflector, BGP provides the
following measures to avoid internal AS looping:
1) Configure the Originator_ID of the route reflector
The Originator_ID is established by route reflector. The originator will drop the update
packet returning to the originator should it be improper configuration.
The parameter is not necessarily configured, and it will automatically function upon
enabling BGP.
2) Configure the Cluster_ID of the route reflector
Operation
Operation
Huawei Technologies Proprietary
5-20
Chapter 5 BGP Configuration
Command
reflect between-clients
undo reflect between-clients
Command
reflector cluster-id { cluster-id
| address }
undo reflector cluster-id