DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide
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7-14 bgp confederation identifier
This command is used to specify the BGP confederation identifier. Use the no form of this command to remove the
confederation identifier.
bgp confederation identifier
AS-NUMBER
no bgp confederation identifier
Parameters
7-15 bgp confederation peers
This command is used to add BGP confederation peers. Use the no form of this command to delete the confederation
peers.
bgp confederation peers
ASPATH-LIST
no bgp confederation peers
ASPATH-LIST
Parameters
AS-NUMBER
Specifies the Autonomous System number, used to specify the BGP confederation.
This value must be between 1 and 4294967295. The AS TRANS value is 23456.
Default
None.
Command Mode
Router Configuration Mode.
Command Default Level
Level: 8. (
EI Mode Only Command
)
Usage Guideline
A confederation can be used to reduce the internal BGP (iBGP) mesh by dividing a
large single AS into multiple subs-ASs. External peers interact with the
confederation as if it is a single AS.
Each subs-AS is fully meshed within itself and it has connections to other sub-ASs
within the confederation. The next-hop, Multi Exit Discriminator (MED), and local
preference information is preserved throughout the confederation, allowing users to
retain a single Interior Gateway Protocol (IGP) for all the autonomous systems.
Use the
show ip bgp confederation
command to verify your settings.
Example
This example shows how to create a confederation in which the AS number is 20.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#router bgp 100
DXS-3600-32S(config-router)#bgp confederation identifier 20
DXS-3600-32S(config-router)#
ASPATH-LIST
Specifies one or multiple AS number partitions, separated by a comma. This value
must be between 1 and 4294967295, however, for the AS TRANS, this value must
be 23456. This parameter specifies Autonomous System numbers for BGP peers
that will belong to the confederation.
Default
None.
Command Mode
Router Configuration Mode.
Command Default Level
Level: 8. (
EI Mode Only Command
)
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