Confederation - Juniper ACX1000 Configuration Manual

ACX Series Universal Access Router Configuration Guide

confederation

Syntax
Hierarchy Level
Release Information
Description
Options
1472
confederation confederation-autonomous-system members [ autonomous-systems ];
[edit logical-systems logical-system-name routing-options],
[edit routing-options]
Statement introduced before Junos OS Release 7.4.
Statement introduced in Junos OS Release 9.0 for EX Series switches.
Statement introduced in Junos OS Release 11.3 for the QFX Series.
Statement introduced in Junos OS Release 12.3 for ACX Series routers.
Statement introduced in Junos OS Release 14.1X53-D20 for the OCX Series.
Specify the routing device's confederation AS number.
If you administer multiple ASs that contain a very large number of BGP systems, you can
group them into one or more confederations. Each confederation is identified by its own
AS number, which is called a confederation AS number. To external ASs, a confederation
appears to be a single AS. Thus, the internal topology of the ASs making up the
confederation is hidden.
The BGP path attributes
NEXT_HOP
are restricted to a single AS, are allowed to be propagated throughout the ASs that are
members of the same confederation.
Because each confederation is treated as if it were a single AS, you can apply the same
routing policy to all the ASs that make up the confederation.
Grouping ASs into confederations reduces the number of BGP connections required to
interconnect ASs.
If you are using BGP, you can enable the local routing device to participate as a member
of an AS confederation. To do this, include the
Specify the AS confederation identifier, along with the peer AS numbers that are members
of the confederation.
Note that peer adjacencies do not form if two BGP neighbors disagree about whether
an adjacency falls within a particular confederation.
autonomous-systems —AS numbers of the confederation members.
Range: 1 through 65,535
confederation-autonomous-system
assigned to you by the NIC.
Range: 1 through 65,535
, , and
LOCAL_PREF MULTI_EXIT_DISC
confederation
—Confederation AS number. Use one of the numbers
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, which normally
statement.