Huawei Quidway S3500 Series User Manual

Operation Manual - Routing Protocol
Quidway S3500 Series Ethernet Switches Chapter 5 BGP Configuration
Huawei Technologies Proprietary
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5.2.16 Configuring BGP AS Confederation Attribute
Confederation provides the method to handle the booming IBGP network connections
inside AS. It divides the AS into multiple sub-AS, in each of which all IBGP peers are
fully connected, and are connected with other sub-AS of the confederation.
The shortcomings of confederation: it is required that the route be re-configured upon
switching from non-confederation to confederation solution, and that the logic topology
be basically changed. Furthermore, the path selected via confederation may not be the
best path if there is no manually-set BGP policy.
I. Configuring confederation_ID
In the eye of the BGP speakers that are not included in the confederation, multiple
sub-ASs that belong to the same confederation are a whole. The external network does
not need to know the status of internal sub-ASs, and the confederation ID is the AS
number identifying the confederation as a whole.
Perform the following configurations in BGP view.
Table 5-35 Configuring confederation_ID
Operation Command
Configure confederation_ID
confederation id as-number
Canceling confederation_ID
undo confederation id
By default, the confederation_ID is not configured.
II. Configuring sub-AS belonging to the confederation
Configure confederation_ID first, and then configure the sub-AS belonging to the
confederation. One confederation includes up to 32 sub-AS. The as-number used upon
configuring sub-AS belonging to the confederation is valid within the confederation.
Perform the following configurations in BGP view.
Table 5-36 Configuring sub-AS belonging to the confederation
Operation Command
Configure a confederation
consisting of which sub-ASs
confederation peer-as as-number-1 [ ...
as-number-n ]
Cancel the specified sub-AS in
the confederation
undo confederation peer-as [ as-number-1 ]
[ ...as-number-n ]
By default, no autonomous system is configured as a member of the confederation.

Huawei Quidway S3500 Series Specifications

General

Brand	Huawei
Model	Quidway S3500 Series
Category	Network Router
Language	English