D-Link DI-1750 Reference Manual page 264

......
(09)route-map
......
Please Input the code of command to be excute(0-17): 9
input 9，Select route-map option ，prompt is as below:
(00)WORD
Please Input the code of command to be excute(0-0): 0
input 0，Select WORD option ，prompt is as below:
Please input a string:
input string ，then prompt is as below:
(00)in
(01)out
Please Input the code of command to be excute(0-1):
Select parameter .
See the "BGP Community Attribute Route Mapping Example" section for examples of BGP community
attribute.
6.12.18 Configure Autonomous System Confederation
One way to reduce the IBGP mesh is to divide an autonomous system into multiple sub-autonomous
systems and group them into a single confederation. To the outside world, the confederation looks like
a single autonomous system. Each sub-autonomous system is fully meshed within itself, and has a few
connections to other sub-autonomous systems in the same confederation. Even though the peers in
different autonomous systems have EBGP sessions, they exchange routing information as if they were
IBGP peers. Specifically, the next-hop, MED, and local preference information is preserved.
To configure a BGP autonomous system confederation, you must specify a confederation identifier. A
confederation identifier is a number of autonomous system. To the outside world, the group of
autonomous systems will look like a single autonomous system with the confederation identifier as the
autonomous system number.
To configure an autonomous system confederation identifier, use the following BGP configuration
command in router configuration mode:
bgp confederation0 identifier autonomous-system
In the prompt Select 1 option ，prompt is as below:
(00)always-compare-med
......
(04)confederation
......
Please Input the code of command to be excute(0-8): 4
input 4，Select confederation option ，prompt is as below:
(00)identifier
(01)peers
Please Input the code of command to be excute(0-1): 0
input 0，Select identifier option ，prompt is as below:
(00)<1-65535>
Please Input the code of command to be excute(0-0): 0
Select 0，then prompt is as below:
Please input a digital number:Please input a string:
input autonomous-system value
To specify the autonomous system number that belong to an autonomous system confederation, use
the following BGP configuration command:
Apply route map to the neighbor
Name of route-map
Map incoming routes
Map outgoing routes
Command
Always compare MED
AS confederation
AS number of AS confederation
AS confederation members
AS number
Command
Model Name
Configure
confederation identifier.
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Purpose
an autonomous system
Purpose